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以实际刊发为准
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XIAO Gao, ZHENG Mingzhu, LI Xiaohui
2025,42(2), DOI:
Abstract:
Agricultural and forestry biomass, as a cheap and easily available renewable resource, is naturally rich in carbon sources and porous channels. New porous chemical materials with excellent properties can be obtained by car-bonization, activation and other composite modification methods, which has broad application prospects in energy storage. Especially in the application of lithium-ion batteries, biomass-derived porous carbon can improve the cycle performance, capacity and rate performance of batteries. The latest research progress and development status of bio-mass-based anode materials for lithium-ion batteries at home and abroad are reviewed, and the electrochemical per-formance of biomass-based (rice husks, corn stalks, cotton and fruit husks, et al.) anode materials for lithium-ion bat-teries is mainly introduced. In addition, the existing problems of biomass-based anode materials are also discussed, and the future development direction of biomass in the field of energy storage is prospected, which provides new ways and strategies for the synthesis of new carbon materials in chemical industry and the sustainable development of lithium-ion batteries.
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HU Shukang, ZHAO Bingtao, FAN Zhibin, SU Ya-xin
2025,42(2), DOI:
Abstract:
CO2 capture, utilization and sequestration technology is an effective solution to achieve carbon neutralization, and the development of high-tech and economical enhanced absorption is the prerequisite for carbon capture. Due to the limitation of monoamine solution, the multi-component mixed solvents based on the coupling strategy can enhance the absorption of CO2, especially the CO2 emitted during the energy utilization process, which can achieve the coordination of functional groups, enhance the absorption performance and reduce the energy consumption of regeneration. In this paper, the performance characteristics and process mechanism of enhanced absorption of CO2 by the latest multicomponent complex based on MEA, anhydrous, ionic liquids and phase change absorbents are discussed. The quantitative effects of important operating parameters such as CO2 partial pressure, temperature, solution ratio and gas-liquid flow rate on the absorption properties are analyzed, and its technical and economic properties are analyzed and evaluated. Finally, the problems to be solved in the development of CO2 absorption by multi-component mixed solvents based on MEA are summarized and the future development direction is prospected, in order to provide reference for the development of new composite MEA solutions to absorb CO2.
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DIAO Kunlan, DU Jingyu, ZHAN Xiao, ZHANG Daohai
2025,42(2), DOI:
Abstract:
Lithium air batteries have high energy density and low reduction potential. They are a green energy storage battery needed by modern society and have a wide range of applications. Because the traditional organic electrolytic has problems such as combustible, decomposition, the formation of lithium dendrites and the formation of a passivation layer that hinders the diffusion of O2, solid electrolytes need to be developed to improve the performance of lithium air batteries. This article first introduces the construction and working mechanism of lithium air batteries, and then summarizes the regulation strategy of the classic all-solid lithium air battery (ASSLAB), including the positive control strategy and electrolyte control strategy. At the same time, it summarizes the integrated design strategy of positive/electrolyte. Finally, it looks forward to the development direction of solid electrolyte, interface modification (i.e., the improvement of electrolyte and electrode interface resistance) and the optimization of air cathode design of lithium air batteries.
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CHEN Xiuqiong, WANG Hongcai, BU Yanan, WU Ting, YAN Huiqiong, LIN Qiang
2025,42(2), DOI:
Abstract:
Alginate electrospun composite nanofibers combine the material characteristics of alginate with the structural characteristics of electrospun nanofibers, which makes them be widely used in regenerative medicine fields such as tissue engineering, drug delivery and medical dressings. Alginate electrospun nanofibers with the characteristics of porosity, pore connectivity, large specific surface area, air permeability, liquid absorption, etc., are able to maintain the wet microenvironment of wound healing, and their chemical structures are similar to that of the natural cytoplasmic matrix, which can support cell adhesion, proliferation and differentiation, so they become the ideal cell growth matrixes that can be used in the development of functional biomedical materials. In order to develop the ideal multi-functional biomedical materials by electrospinning technology with the alginate, in this review, the shortcomings of alginate electrospinning and the methods to overcome these problems were introduced in detail, and the application trend of alginate electrospun composite nanofibers in biomedical materials were prospected. The objective of this review is to provide theoretical basis for the development and sustainable application of alginate based functional biomedical materials.
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DU Jiajia, ZHAN Xiao, DU Jingyu, ZOU Kaixiang, ZHANG Daohai
2025,42(2), DOI:
Abstract:
Carbon materials possess excellent conductivity, chemical stability, and high surface area, which facilitate effective charge storage and release. They also provide good cycle stability and energy storage capabilities. However, pure carbon materials suffer from limitations in energy storage capacity due to poor surface wettability, uniform charge distribution, and a lack of active sites. These limitations have restricted their applications in energy, catalysis, and other fields. The doping of heteroatoms has great potential for enhancing the energy storage properties of carbon materials. The co-doping of N and B can create a unique electronic structure that greatly improves the catalytic properties of carbon materials. This allows N and B co-doped carbon materials to be widely used in applications such as sensors, energy storage, electrocatalysis, and hydrogen storage. This article summarizes the synthesis strategies for preparing N and B co-doped carbon materials and their applications in energy storage (batteries and capacitors). This provides opportunities for exploring new energy materials and efficient storage materials, opening up broader avenues for the development of more high-performance doped materials.
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ZHAO Wenhao, WANG Qi, WANG Kaihua, CHEN Yang, LI Jinping, LI Libo
2025,42(2), DOI:
Abstract:
Metal-organic frameworks(MOF), as a new type of crystalline porous material, has been widely explored in the fields of catalysis, gas separation, sensing, and drug delivery, and as an important new type of porous material, it has great application value in the field of fine chemicals. The premise of MOF’s application is that it can be prepared on a large scale at low cost. However, the traditional solvothermal synthesis method needs to consume more organic solvents, which has the disadvantages of low output, high energy consumption and difficult waste liquid treatment, and does not meet the requirements of green chemical industry development. Nowadays, the green preparation method of MOF is gradually moving towards solventless, in order to realize the balanced development of economic benefits and environmental benefits of industrial production. In this paper, the solvent-free green synthesis of MOF is the theme, and several strategies, such as steam-assisted synthesis, mechanochemical synthesis, solvent-free direct conversion and accelerated aging synthesis, are successively reviewed from less solvent and green solvent synthesis to trace or even solvent-free synthesis. The advantages and dis- advantages of different methods are evaluated, the necessity of realizing scale-up synthesis is pointed out, and the development prospect of MOF in large-scale commercial applications in the future is prospected.
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FAN Qian-qian, LIU Mi, LI Xingyao, MA Jianzhong
2025,42(2), DOI:
Abstract:
Halide perovskite nanocrystals are widely used in fields such as photocatalytic reduction, light-emitting diodes, and fluorescence anti-counterfeiting due to their tunable bandgap, strong light absorption ability, and high carrier mobility. However, their stability is greatly affected by environmental factors such as moisture, oxygen, and light, which severely limits their commercial applications. Therefore, how to improve the stability of perovskite has become a research hotspot in recent years. The encapsulation of halide perovskite nanocrystals using porous material pore structures is considered an effective method to improve their stability. In this article, the structure and characteristics of halide perovskite nanocrystals@porous materials are introduced. In addition, the preparation methods and application research of perovskite nanocrystals coated with MOFs, COFs, and porous SiO2 are summarized . Finally, the existing problems and further research directions in the current research of halide perovskite nanocrystals @ porous materials are put forward.
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YANG Xubing, ZHANG Jin, LIU Wei, QIN Ziyu, LIU Zhongxin, JI Xiangyang, WANG Dun, YIN Xueqiong
2025,42(2), DOI:
Abstract:
On the premise of ensuring the excellent transparency of polycarbonate (PC) film, the improvement of UV resistance and abrasion resistance can greatly expand its application range. In this paper, a PA-nano TiO2/PC composite film was prepared by coating the PC film with polyacrylate/nano TiO2 blended emulsion (PA-nano TiO2) through spin coating process. The results of scanning electron microscopy and ultraviolet test showed that the nanoparticles in the PA-nano TiO2/PC composite film distributed uniformly, the surface of the film was uniform and dense, and the ultraviolet absorption was enhanced. The transmittance of the composite film was still the same as that of the high-transmittance PC film, with the highest light transmittance of 90%, maintaining excellent transparency. From the friction and wear test results, it could be seen that the friction coefficient of the composite film decreased, and the surface hardness increased from B to 2H after modification, showing better wear resistance ability. The results of ultraviolet aging test showed that the PA-nano TiO2/PC composite film had a lower aging degree, a lower degree of discoloration, and better anti-ultraviolet aging performance at the same aging time.
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ZHANG Qun, GUO Ye-yang, ZHENG Yu-tao, PAN Shi-yin, LIU-Rui, HUANG Sai-peng, GUO peng-qi, XUE Wei-ming
2025,42(2), DOI:
Abstract:
In response to the demand for dry eye treatment by lacrimal duct embolization, this paper prepared the oxidized Pululan polysaccharide (OPL) by the Dess-Martin oxidation method, while ensuring the integrity of the sugar ring structure. A thermosensitive hydrogel OPL-HPCS-GP with interpenetrating structure by Schiff-base bond and hydrogen bond was prepared based on hydroxypropyl chitosan (HPCS) and sodium glycerophosphate (GP). Structure and morphology of hydrogels were characterized using 1HNMR, FTIR, SEM. Other properties such as mechanical properties, rheology properties, swelling properties, degradation properties, drug load and release, hemocompatibility, and cytotoxicity were also analyzed. The effect on lacrimal embolism of OPL-HPCS-GP hydrogel was evaluated by rabbit dry eye models. The results showed that OPL-HPCS-GP sol can rapidly transfer to gel with dense and uniform network structure at physiological temperature (37 ℃). The maximum stress (1.96±0.12) N and compression modulus (30.22±2.27) kPa of OPL-HPCS-GP hydrogel showed good mechanical properties. In simulated tear fluid, the equilibrium swelling rate of OPL-HPCS-GP was (209.50%±5.75%), the degradation rate was (25.18%±1.47%) within 60 d. The hemolysis rate of OPL-HPCS-GP hydrogel on sheep erythrocytes was (1.95%±0.11%), and the cell viability of L929 cells was (112.97%±2.64%), which indicating excellent biocompatibility. Compared with the New Zealand white rabbit autogenous dry eye group, the treated one injected with OPL-HPCS-GP was still able to maintain the TMH with 325 μm at 30 d which can improved the symptoms of dry eye.
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LI, Wanshen, YAO, Hongrui, WANG na
2025,42(2), DOI:
Abstract:
Titanium dioxide (TiO2) was prepared on the surface of hexagonal boron nitride (h-BN) by in-situ hydrolysis of titanium tetrachloride. TiO2 modified h-BN nanocomposite filler (h-BN@TiO2) was obtained and added to water-based epoxy coating (WEC) to prepare h-BN@TiO2 /WEC composite coating. FTIR, XRD and SEM tests show that TiO2 is successfully supported on h-BN nanosheets, which is conducive to increasing h-BN layer spacing and reducing accumulation. The corrosion behavior of h-BN@TiO2/WEC composite coating was studied by electrochemical impedance spectroscopy (EIS) and salt spray experiment. The results show that after soaking NaCl solution with a mass fraction of 3.5% for 600 h, the coating resistance of h-BN@TiO2 /WEC composite coating increases from 9.884×105 Ω·cm2 to 5.055×106 Ω·cm2 compared with pure WEC. And its low-frequency impedance (Zf= 0.01Hz) is always the highest and most stable. Meanwhile, the 600 h salt spray test results prove that the addition of h-BN@TiO2 to the waterborne epoxy coating can effectively slow down the diffusion rate of corrosive medium to the coating, and improve the shielding and anti-corrosion properties of the coating.
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WANG Li-sheng, SONG Tao, CEN Yu, QI Hai-song, HAN Tingting
2025,42(2), DOI:
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Carbon nanotubes (CNTs) have a strong tendency to entangle and aggregate each other, which is the key problem for them to achieve excellent performance in conductive composites. Therefore, the objective of this study is to modulate the aspect ratios and -COOH content of cellulose nanocrystals (CNCs) and use CNCs with different aspect ratios and -COOH content as a new type dispersant to enhance the dispersibility of CNTs in aqueous phase as well as the properties of CNTs-CNCs composite nano-membranes (CNMs). It was found that the addition of CNCs as well as their reduction in aspect ratio and the increase in -COOH content, significantly improved the CNTs dispersion as well as the mechanical and electrical properties of CNMs. Among them, the dispersibility of CNTs, the tensile and sensing performance of CNMs were more affected by the aspect ratio of CNCs. The highest tensile strength, toughness and resistance change rate of the CNMs were 73.2 MPa, 2.5 J/m3, and 33.3%, respectively. On the other hand, the conductivity of CNMs was jointly affected by the aspect ratio and -COOH content of CNCs, but the influence of -COOH content was more direct. When the aspect ratio of CNCs was below 50 and the -COOH content was above 0.65 mmol/g, the conductivity of CNMs reached over 20 S/cm.
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FU Yuanfeng, FAN Zhenzhong, LIU Qingwang, TONG Qilei, CAI Li, ZHANG Xuesong
2025,42(2), DOI:
Abstract:
To improve the water stability of copper-based metal-organic framework materials (HKUST-1) for the selective adsorption of organic solvents and oil phases in oil-water mixtures, hydrophobic modification of HKUST-1 crystals with stearic acid (SA), which has a long carbon chain structure, was used as a modifier to prepare hydrophobic/lipophilic HKUST-1@SA crystals. The chemical structure, microscopic morphology, thermal stability, water stability and wettability of the crystals before and after modification were characterized by FTIR, XRD, SEM, TGA and contact angle analysis. The selective adsorption oil phase performance of HKUST-1@SA was tested through oil-water separation, oil absorption performance and recycling experiments. The mechanism of hydrophobic modification and oil-water separation has also been suggested from a molecular perspective. The results showed that the hydrophobically modified HKUST-1@SA crystals reacted at 90 °C for 2 h using a 1.5% stearic acid-ethanol solution, the water contact angle on the surface of the hydrophobically modified HKUST-1@SA crystals was 135° and the oil contact angle was 0°. The water contact angle of the HKUST-1@SA crystals remained at 120.4° at 300 °C, and there was no obvious change in crystal structure and wettability after being exposed to water for 14 days. The crystals showed some thermal and water stability. The adsorption amounts of HKUST-1@SA crystals on crude oil, gasoline, kerosene, diesel oil, and n-hexane were 5.54, 8.11, 7.68, 7.22, and 8.32 g/g, respectively. Treatment at 250 °C removed adsorbed light oils (gasoline, hexane) from inside the crystals. After repeating the adsorption-desorption 20 times, the attenuation of the n-hexane adsorption amount was less than 10.2%. The long-chain alkyl groups provided by stearic acid significantly improved the water stability of HKUST-1@SA crystals and enabled them to selectively adsorb tiny oil droplets in the aqueous phase.
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ZENG Xiao-hui, YANG Jie, CHEN Hong-wei, YANG Hao-yu, XIE Juan, WANG Hu
2025,42(2), DOI:
Abstract:
Using hydrothermal method, adjust n(Co)∶n(Ni) in the precursor, load two kinds of bimetallic sulfides (NiCo2S4 and Ni2CoS4), and preparation of oxygen evolution catalysts NiCo2S4/NF and Ni2CoS4/NF.Based on SEM，XRD andXPS characterization, and electrochemical performance testing were conducted to investigate the effects of n(Co)∶n(Ni) (1:2~3:2) on the structural morphology, elemental composition, and oxygen evolution performance of the catalyst.When n(Co)∶n(Ni)=1:2, the obtained metal sulfide is cubic phase Ni2CoS4; When n(Co)∶n(Ni)≥1, the obtained metal sulfide is cubic phase NiCo2S4. When n(Co)∶n(Ni)=1:1, the prepared NiCo2S4/NF exhibits superior OER performance. Compared to Ni2CoS4/NF, when the current density is 20 mA/cm2, its overpotential is only 216 mV, The Tafel slope is 72 mV/dec, which has a larger electrochemical active area and lower charge transfer resistance. During the OER process, MOOH (M=Co，Ni) forms on the surface of the catalyst is conducive to the progress of OER; According to density functional theory (DFT) calculations, The Gibbs free energy required for OER in NiCo2S4 is lower.
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ZHANG Jin-jin, ZHANG Xu-bin, WANG Fu-min, BING Chang-hao, QI Zhi-qiang
2025,42(2), DOI:
Abstract:
Vanadium-based ultra-stable Y zeolite loaded with phosphotungstic acid (V-HUSY/HPW) was prepared by the demetalation-metalation method using H-type ultra-stable Y zeolite (HUSY) as the support, and ammonium metavanadate and phosphotungstic acid hydrate (HPW) as raw materials. The structure, morphology, and elemental content were studied by XRD, FTIR, UV-vis, TEM, SEM, N2 adsorption-desorption and ICP-OES. The V-HUSY/HPW was employed in the oxidative desulfurization reaction of dibenzothiophene (DBT) model oil to investigate the effects of V and HPW additions on the desulfurization rate and to test the cycling stability of the catalysts and speculate on the mechanism of the oxidative desulfurization reaction. The results showed that V species were introduced into the framework of the HUSY by the demetalation-metalation method, while HPW was loaded on the surface of HUSY by the impregnation method. V-HUSY0.1/HPW0.5 prepared at the additions of V and HPW of 0.1 mmol and 0.5% (in percent by mass of V-HUSY), respectively, had the best performance. The desulfurization rate of the model oil was 99.5% at a reaction temperature of 60 ℃ and a reaction time of 20 min under the conditions of 0.1 g of V-HUSY0.1/HPW0.5, 20 mL of DBT model oil (DBT mass concentration of 360 mg/L), and 15.8 μL of tert-butyl hydroperoxide (TBHP) as oxidant. After 6 cycles, the desulfurization rate of DBT model oil was still up to 98.3%. During the oxidative desulfurization process, the hydroxyl radical (?OH) was the main active species, which could convert DBT into more polar sulfone and then retained in the pore structure of the catalyst, so that a one-step in-depth desulfurization could be achieved without the need of extraction.
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2025,42(2), DOI:
Abstract:
Ultrasound-assisted ionic liquid (1-alkyl-3-methylimidazole bromide salt, EADS) was used to extract the polysaccharides of Stropharia rugosoannulata, and the extraction process was optimized by one-factor and response surface method. A DEAE-100 cellulose column and a Sephadex G-100 gel column were used to purify the crude polysaccharide (SRP) of Stropharia rugosoannulata to obtain SRP-I. The structural properties of SRP-I were explored by UV, FTIR, GC-MS, XRD, SEM, EDS, Congo red, thermogravimetric analysis, acid hydrolysis, Smith degradation, and NMR, and the structural properties of SRP-I were evaluated. antioxidant and hypoglycemic activities. The results showed that the optimal extraction process for SRP was 106 min extraction time, 51°C extraction temperature, 4.3 mg/mL EADS mass concentration, 0.52 g cellulase addition, and the extraction rate reached (32.54±0.12)% under these conditions; SRP-I is a neutral polysaccharide with triple helical conformation of α-D-pyran conformation, with a flat and smooth surface, amorphous and crystals coexist, with good thermal stability and a residual carbon rate of 26.34% at 550 °C; the average molecular weight is 24.321 KDa, mainly composed of fucose (53.31 %), glucose (43.32 %) and galactose (3.37 %), where fucose is mainly present in the side chain, while glucose and galactose are more homogeneously distributed in both the main chain and the side chain, and the monosaccharides are mainly distributed among each other in the form of [→3)-Glcp(1→] and [→6)-Galp(1→] structures, while the branched chain structure of [→3,6)-Glcp(1→] also existed; the scavenging rate of SRP-I for DPPH radicals, ABTS radicals, and hydroxyl radicals was up to 82.54%, 51.62%, and 51.57% at the mass concentration of 2.5 mg/mL, respectively, and its The IC50 values were 0.127 mg/mL, 2.438 mg/mL, and 2.446 mg/mL, respectively. α-Amylase and α-glucosidase inhibition rates were 61.2% and 71.4%, respectively, and the IC50 values were 0.97 mg/mL and 0.24 mg/mL.
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Biological activity evaluation and identification of polyphenols from Yunnan Coffea Arabica pericarp
DONG Shi-hao, XU Ning-meng, ZI Lu-xi, YANG Jing-jing, QIN Fen, GUO Lei
2025,42(2), DOI:
Abstract:
In order to evaluate the bioactivity of polyphenols from Yunnan Coffee Arabica Pericarp (PYCAP), using purified polyphenols by macroporous resin as raw material, and the inhibitory mechanisms of PYCAP on α-amylase, α-glucosidase were analyzed by Lineweaver-Burk equation and Dixon equation, respectively. The Inhibitory effect of pancreatic lipase and xanthine oxidase were also determined. Finally, the chemical composition was identified by the Ultra Performance Liquid Chromatography-Quadrupole Time of Flight Mass Spectrometry (UPLC-QTOF-MS/MS). The results showed that the PYCAP had strong antihyperglycemic, hypolipidemic and uric-acid-lowering effect, and the inhibitory ability exhibited a certain dose effect. The IC50 value of α-amylase and α-glucosidase inhibition were (0.056±0.005) and (0.073±0.002) mg/mL, respectively. Further the inhibition type of α-amylase and α-glucosidase were also competitive-noncompetitive mixed inhibition. In addition, the IC50 value of pancreatic lipase and xanthine oxidase inhibition were (0.034 ± 0.003) and (0.251 ± 0.011) mg/mL, respectively. A total of 27 chemical components were identified, including flavonoids, pyrans, and phenolic acids. These results confirmed the good biological activity of the PYCAP, and provided a scientific foundation for the comprehensive development and utilization of Yunnan Coffee Arabica pericarp.
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QIN Jiawei, CHENG Qiao, WANG Yaosong
2025,42(2), DOI:
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The ginkgo seed protein isolate (GSPI) solution and pullulan (PULL) solution were mixed to obtain a final GSPI concentration at 120 g/L, which contains 25, 50, and 100 g/L PULL, respectively. Following lyophilization of the mixed solutions, the GSPI-PULL conjugates were incubated at 70°C and 63% relative humidity for 1-7 d. The effect of conjugation on the heat-induced gel texture softening was investigated by characterizing the physicochemical properties of the GSPI-PULL conjugations, along with the physiochemical properties and microstructure of the GSPI-PULL gels. It was demonstrated that PULL is capable of conjugating with GSPI, and their grafting degree depends on both PULL concentration and reaction time. A heating effect promoted the unfolding of the protein structure, and conjugation reactions brought hydrophilic groups into the protein. The unfolding of the protein structure was facilitated by a heating effect, and hydrophilic groups were introduced to the protein through conjugation reactions. Heating and conjugation both attenuate GSPI gelation, and were of composite effects, resulted in GSPI gels changing from a "standing solid" to a "semisolid/sol", achieved the heat-induced protein gels with tunable textural properties.
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ZHANG Yuyuan, HONG Liu, YANG Cheng
2025,42(2), DOI:
Abstract:
Dental plaque biofilm is one of the main factors that induce oral diseases. Due to the continuous fluidity of saliva and poor permeability of drug in the biofilm, the effect of traditional oral antibacterial agents is limited. In this work, nanogel CSN has been prepared via the physical crosslinking of carboxymethyl starch (CMS) and stannous ion (Sn2+), of which the adhesion to caries-induced Streptococcus mutans (S. mutans) biofilm was enhanced by further complexing chitosan (CS). Structure and morphology of all above materials have been characterized by 1H-NMR, FT-IR, Zeta potential and TEM measurements. As a novel drug delivery system, CS/CSN@MH was finally formed by encapsulating minocycline (MH) in the gel, while the drug encapsulation efficiency and loading rate was estimated as 76.48% and 10.64%, respectively. Different from the sudden release effect of free MH in simulated oral environment, the cumulative release of CS/CSN@MH within 48 h was 47.46%. The residual S. mutans biofilm after CS/CSN@MH treatment was only 13.76%. The removal of biofilm was also confirmed by live/dead bacterial staining assay and bacterial morphology after treatment.
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GAO Dang-ge, ZHANG Ai-lin, BAO Xin, CHEN Zhi-xin, LI Yun, LV Bin
2025,42(2), DOI:
Abstract:
Hydroxypropyl chitosan passivated Cs3Bi2Cl9 quantum dots (HPCS-PQDs) were prepared using ligand assisted reprecipitation method. The morphology and optical properties of HPCS-PQDs were characterized by TEM, XRD, PL, and UV-Vis. And it was loaded onto cellulose filter paper to obtain an HPCS-PQDs sensor, and the selectivity, anti-interference ability, and sensitivity of the sensor for detecting UO22+ were studied. The results showed that HPCS-PQDs were spherical with an average particle size of 3.21 nm, emitting blue fluorescence. The emission peak was located at 440 nm, and the half maximum width of the emission peak was about 50 nm. When the UO22+ concentration is between 0 and 100 μmol/L, as the concentration of UO22+ increases, the blue fluorescence of the sensor gradually decreases. The quenching efficiency (F0-F)/F0 of HPCS-PQDs sensor has a good linear relationship with UO22+ concentration, with a detection limit of 0.23 nmol/L. In addition, HPCS-PQDs have good selectivity and anti-interference ability, which can be used for rapid detection in actual water samples. The spiked recovery rate of actual samples is 90.0%~99.8%, and the relative standard deviation is less than 5%. This method has the advantages of simplicity, speed, and efficiency, and can achieve visual detection of UO22+ in environmental water samples.
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WANG Hanrui, DU Chenyang, WANG Qiang, WANG Cong, LIU Yuqing, LI Chunguang
2025,42(2), DOI:
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Using hydrothermal synthesis method, the HPW@UiO-66(Ce) composite materials was prepared by loading phosphotungstic acid (HPW) on the cerium-based metal organic framework materials UiO-66(Ce). And then HPW@UiO-66(Ce) was characterized by SEM, XRD, FT-IR, BET, UV-DRS, XPS methods. The photocatalytic degradation performance of HPW@UiO-66(Ce) on tetracycline degradation was evaluated, and the photocatalytic mechanism was discussed. The results showed that the HPW@UiO-66(Ce) composites enhanced the photocatalytic degradation of tetracycline by broaden the visible light absorption range of UiO-66(Ce). The HPW@UiO-66(Ce)-0.7 had the best activity for photocatalytic degradation of TC, and the degradation efficiency of TC at 60 mg/L could reach 96.43% when the material dosage was 0.5 g/L in visible light for 90 min. The hole (h+), superoxide radical (?O2?) and hydroxyl radical (.OH) play a major role in the photocatalytic degradation of tetracycline.
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LU Xingyu, DENG Xiaoye, LI Yingjie, SHEN Hangyu, CHEN Congjin[]?, Tong Zhangfa
2025,42(2), DOI:
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Magnetic activated carbon based on oily sludge was prepared by one step method from the mixture of oily sludge rich in iron and eucalyptus sawdust. The magnetic activated carbon was characterized by SEM, BET, FTIR, XPS, XRD and VSM. The prepared activated carbon was used to adsorb ciprofloxacin hydrochloride (CIP) in the aqueous phase. The results show that there are more pores and collapse on the surface of the oil sludge based magnetic activated carbon after adding eucalyptus sawdust (MAC850). The specific surface area is 6.65 times that of single raw material oily sludge based activated carbon (OAC), which is 782.432 m2/g. In the batch adsorption experiments, the influence factors of CIP concentration, adsorbent dosage, contact time, solution pH value and coexisting ions on CIP adsorption were investigated. MAC850 has good anti-interference ability. In the solution pH range of 4-8, the CIP removal rate of MAC850 is above 85%. pH=5 is the most favorable for adsorption, and the adsorption capacity is 232.56 mg/g. The adsorption kinetics of CIP on MAC850 is consistent with the pseudo-second-order kinetic model, the adsorption isotherm model is consistent with the Langmuir model, and the maximum adsorption capacity reaches 302.11 mg/g, which is a single surface chemical adsorption. The adsorption process is a spontaneous endothermic process. MAC850 has good adsorption capacity and reusability, and the removal rate of CIP is 89.38% after seven cycles on the conditions of the temperature of 308 K, the initial CIP concentration of 150 mg/L, the amount of activated carbon of 0.6 g/L, the adsorption time of 420 min, and the liquid nature pH (4.6). The results of this work provide a theoretical basis for the harmlessness and reduction of oily sludge, and also provide a reference for CIP wastewater treatment. The adsorption of CIP on MAC850 is based on electrostatic interaction, hydrogen bonding and π-π interaction.
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GONG Li-hao, YU Can-Yi, ZHANG Xue-jun, SUN Jia-long, WANG Liang-bin, ZHANG Hong-ji
2025,42(2), DOI:
Abstract:
In order to overcome the shortcomings of the existing photonic crystal solution with low solid content and complex and numerous processes in the preparation of thin films, the simple preparation of large-area solve-responsive photonic crystal films is achieved to meet the requirements of industrial production. Styrene (St), n-butyl acrylate (BA) and allyl methacrylate (AMA) are used as monomers. The colloidal microspheres P(St-BA-AMA) were prepared by semi-stepwise emulsion polymerization, and then the photonic crystal (PCs) films were prepared by thermal assisted self-assembly. The structural morphologies of P(St-BA-AMA) and PCs films were characterized by FTIR and SEM, and the PCs films were tested by DSC and reflectance spectroscopy. The effects of different P(St-BA-AMA) particle size, film forming temperature and response solvent on the structural color of PCs films were investigated. To explore the application of PCs film in patterned anti-counterfeiting and water-responsive paper preparation. The results showed that P(St-BA-AMA) with an average particle size of 198-306 nm could be prepared by adjusting the amount of seed emulsion, and the particle size of each microsphere was uniform. The structural colors of PCs films with P(St-BA-AMA) particle size from 185 nm to 272 nm were purple, blue, green, orange and red, respectively. The PCs films prepared by 210 nm P(St-BA-AMA) were infiltrated by water, ethanol and acetic acid, and showed structural colors of purple, blue and green, respectively. When the film forming temperature is 40~120 ℃, the periodic arrangement of colloidal microspheres on the surface of PCs film remains unchanged and has its own stability. The structural color response of PCs film to solvent can be applied to patterned anti-counterfeiting and water-responsive paper preparation, which can prevent the problem that the structural color rendering is the same as the background color and the anti-counterfeiting effect is not obvious. PCs film can be repeatedly written and erased. The structural color response of PCs film to solvent is due to the interaction between polar solvent and shell monomer, resulting in refractive index difference between polymer microsphere core layer and shell layer, resulting in bright structural color of originally colorless photonic crystal film.
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ZHENG Xi-xi, FEI Gui-qiang, DUAN Yi-hao, ZHENG Yong-jia, Wang Zhi-dong, BAI Yang
2025,42(2), DOI:
Abstract:
In order to improve the heat resistance and coating adhesion of waterborne varnish, butyl acrylate (BA) and methyl methacrylate (MMA) were used to design emulsion particles for soft and hard monomers, respectively, low Tg and high Tg acrylate emulsions with different glass transition temperature (Tg) values were prepared by adjusting the addition ratio of BA and MMA, and low Tg and high Tg silicon-acrylic emulsions were prepared by using γ-methacryloyloxypropyltrimethoxysilane (KH570) as cross-linked monomer modified acrylate emulsions. The compound emulsion was prepared by hard emulsion compounding, and finally the low-Tg, high-Tg silicon-acrylic emulsion and compound emulsion were used as water-based varnish binders to prepare water-based varnish. Based on SEM, TGA, DSC and tensile experiments, the effects of KH570 dosage (the mass percentage based on the total mass of polymeric monomer, the same below) on the properties of soft and hard silicon acrylic emulsions and water-based varnishes were investigated. The results showed that the average particle size of the low-Tg silicon-acrylic emulsion (dSiPA-3) prepared with KH570 dosage of 3% was 116.5 nm, the minimum film-forming temperature (MFT) was 16.6 °C, the water contact angle of the latex film was 68.6°, Tg=14.25 °C, the water resistance of water-based varnish was up to 50 times, the coating adhesion was grade 0, and the high temperature and anti-adhesion resistance could reach 150 °C. When dSiPA-3 is mixed with gSiPA-3 at the mass ratio of 0.8∶1, the MFT of the mixed emulsion is 33.8 ℃, the Tg of the latex film is 14.19 and 63.54 ℃, the water contact Angle is 77.9°, and the water-based gloss oil is resistant to friction for 500 times and water for 50 times. High temperature resistance and anti-adhesion temperature can reach 210 ℃, coating adhesion level 0.
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LI Bin, JIANG Borui, JIANG Shuang, ZHANG Tianyong
2025,42(2), DOI:
Abstract:
In order to further improve the technological level of domestic erasable pen color paste, a wide temperature range color changing paste with large delay capability was developed. Using crystal violet lactone (CVL) as leucochroma, bisphenol AF(BPAF) as chromogenic agent and 4-benzoxy phenyl ethyl caprate (DPE) as solid solvent, the most suitable core material ratio for erasable inks was m(CVL): m(BPAF): m(DPE)=1:2:50, so that the core material achromatic temperature is greater than 55 ℃ and has a good color-changing lag ability. Using urea-formaldehyde resin as the wall material, the core material was microencapsulated by in-situ polymerization, and the emulsifier concentration, emulsifying stirring speed and time during the microencapsulated process were studied. The microcapsules with particle size ranging from 500 nm to 1300 nm were obtained at 8% emulsifier concentration and a stirring speed of 10,000 rpm for 1 h. The coating rate was 82.4%, the achromatic temperature of the paste was 55~60 ℃, and the color developing temperature was -15~-20 ℃. The color properties of the prepared paste are good, and the erasability meets the requirements of use.
