文章摘要
孙琳,刘志雄.Mn3O4@SiO2核壳磁性复合材料对钼(VI)的吸附性能[J].精细化工,2019,36(8):0
Mn3O4@SiO2核壳磁性复合材料对钼(VI)的吸附性能
Adsorption properties of Mn3O4@SiO2 core-shell magnetic composite for of Mo (VI)
投稿时间:2018-12-20  修订日期:2019-02-27
DOI:
中文关键词: Mn3O4@SiO2  核壳结构  复合材料  纳米粒子  吸附  去除钼(VI)
英文关键词: Mn3O4@SiO2  core-shell structure  composite  nanoparticles  adsorption  Mo (VI) removal
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
作者单位E-mail
孙琳 吉首大学 317972151@sina.com 
刘志雄 吉首大学 liuzhxi@sina.com 
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中文摘要:
      采用氧化法和正硅酸乙酯水解法制备了Mn3O4@SiO2核壳结构磁性纳米材料,研究了其对水溶液中Mo(VI)离子的吸附效果。运用X射线衍射仪(XRD)、扫描电镜(SEM)、透射电镜(TEM)、红外光谱仪(IR)及磁强计(VSM) 等多种手段对Mn3O4@SiO2核壳磁性复合材料进行了表征,并研究了溶液的初始pH、Mo(VI)离子初始浓度和温度对Mo(VI)吸附量的影响。结果表明:在298 K条件下Mn3O4@SiO2核壳结构磁性复合材料对Mo (VI)的饱和吸附量为145.35 mg/g; Mn3O4@SiO2对Mo (VI)的吸附过程符合Langmuir等温吸附模型,吸附动力学符合准二级动力学模型;吸附热力学分析表明Mn3O4@SiO2复合材料对Mo (VI) 的吸附行为是自发的、放热过程。
英文摘要:
      The core-shell magnetic nano-composite Mn3O4@SiO2 was prepared by oxidation and hydrolysis of tetraethyl orthosilicate (TEOS), and the adsorption performance of Mn3O4@SiO2 nanocomposite was explored for the adsorption of Mo (VI) ions from aqueous solutions. The core-shell magnetic nano-composite Mn3O4@SiO2 was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), infrared spectroscopy and magnetmeter (VSM) et al various methods. The effects of solution initial pH, Mo (VI) ion initial concentration and temperature on the amount of Mo (VI) adsorbed were studied. The results showed that the maximum adsorption capacity of the Mn3O4@SiO2 composite for Mo (VI) is 145.35 mg/g at 298 K. The adsorption process of Mn3O4@SiO2 composite is agreed well with Langmuir adsorption isotherm models and pseudo second-order kinetics. The thermodynamic analysis revealed that the adsorption process of Mn3O4@SiO2 composite for Mo (VI) was spontaneous and endothermic.
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