Page 162 - 精细化工2019年第8期

第 36 卷第 8 期 精 细 化 工 Vol.36, No.8
201 9 年 8 月 FINE CHEMICALS Aug. 2019

水处理技术与环境保护
单宁为模板水热合成纳米 TiO 及其对铀的吸附
2

1
范圣茜 ，骆 微 1,2 ，周建飞 2,3 ，廖学品 1,2,3* ，石 碧 1,2,3
（1. 四川大学 生物质科学与工程系，四川 成都 610065；2. 制革清洁技术国家工程实验室，四川 成都
610065；3. 皮革化学与工程教育部重点实验室，四川 成都 610065）

摘要：利用单宁可与金属离子形成稳定配合物的性质，以不同的单宁为模板，水热合成了纳米二氧化钛（T-NTO），
用 FTIR、XRD、BET、SEM、TEM 对合成的 T-NTO 的结构及形貌进行表征，并考察其对铀的吸附性能。结果
表明：以单宁为模板水热法合成可以明显提高纳米二氧化钛的比表面积，从而提高其吸附容量；T-NTO 对铀有
2+
较强的吸附能力，并且以不同单宁为模板制备的 T-NTO 对铀（UO 2 ）的吸附容量存在明显差异，杨梅单宁为模
2
板合成的纳米二氧化钛（BT-NTO）粒径最小，比表面积达到 96.61 m /g；T-NTO 对铀的吸附等温线符合 Langmuir
方程，BT-NTO 在 318 K 时对铀的吸附容量高达 0.7054 mmol/g；而吸附动力学符合准二级动力学方程，吸附速
2+
+
2+
2+
2
2+

2
率较快；共存阳离子 Zn 、Mg 、Pb 、Mn 、Na 及共存阴离子 Cl 、SO 4 、CO 3 对 BT-NTO 吸附铀的影响很
–
–
3+
小，而 F 的影响较大，但可通过引入 Al 来减小 F 的影响。解吸实验表明：0.1 mol/L 的 HNO 3 溶液可使吸附的
铀解吸下来，BT-NTO 可多次重复使用。
关键词：纳米二氧化钛；铀；吸附；单宁；水热合成；水处理技术
中图分类号：TQ134.11；TB383.1 文献标识码：A 文章编号：1003-5214 (2019) 08-1650-10
Hydrothermal Synthesis of Nano-TiO 2 Using Tannins as Templates and
Its Adsorption Performance for Uranium
1,2
1
2,3
FAN Sheng-qian , LUO Wei , ZHOU Jian-fei , LIAO Xue-pin 1,2,3* , SHI Bi 1,2,3
（1. Department of Biomass Science and Engineering, Sichuan University, Chengdu 610065, Sichuan, China; 2. National
Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu 610065, Sichuan,
China; 3. Key Laboratory of Leather Chemistry and Engineering of Ministry of Education, Sichuan University, Chengdu
610065, Sichuan, China）

Abstract: Nano-titanium dioxide (T-NTO) was prepared by hydrothermal synthesis using different tannins
as templates. The structure and morphology of the samples were characterized by FTIR, XRD, BET, SEM
and TEM. Its adsorption performances for uranium were investigated. The results showed hydrothermal
synthesis using tannin as template obviously improved the specific surface area and adsorption capacity of
T-NTO. It was found that T-NTO had a strong adsorption capacity for uranium, and the adsorption capacity
2+
of the T-NTO samples prepared using different tannins as templates for uranium (UO 2 ) was significantly
different. The nano-titanium dioxide (BT-NTO) prepared using bayberry tannin as template had the smallest
2
particle size and its specific surface area was up to 96.61 m /g. Further more, the adsorption process of
uranium by T-NTO was described by Langmuir isothermal model, and the adsorption capacity of BT-NTO
to uranium reached 0.7054 mmol/g at 318 K. The adsorption kinetics followed the pseudo-second-order
2+
–
+
2–
2–
2+
2+
2+
kinetic equation. In addition, coexisting ions, including Zn , Mg , Pb , Mn , Na , Cl , SO 4 and CO 3
–
had little effect on the adsorption capacity of uranium by BT-NTO, while F had greater effect. However,
3+
–
the influence of F could be reduced by introducing Al . The BT-NTO could be regenerated with 0.1 mol/L
HNO 3 solution, and it could be reused many times without obvious decrease of adsorption capacity.
Key words: nano-titanium dioxide; uranium; adsorption; tannin; hydrothermal synthesis; water treatment

收稿日期：2019-01-10; 定用日期：2019-03-25; DOI: 10.13550/j.jxhg.20190035
基金项目：国家重点研发计划（2017YFB0308500）
作者简介：范圣茜（1992—），女，硕士生。联系人：廖学品（1963—），教授，E-mail：xpliao@scu.edu.cn。