采用琼脂包覆法制备TiO<sub>2</sub>纳米薄膜及其光催化性能研究

董虹星; 刘秋平; 刘永锋

doi:10.7513/j.issn.1004-7638.2020.04.004

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采用琼脂包覆法制备TiO₂纳米薄膜及其光催化性能研究

doi: 10.7513/j.issn.1004-7638.2020.04.004

1. 杭州科技职业技术学院机电工程学院, 浙江杭州 311402;
2. 浙江工业大学化学工程学院, 浙江杭州 310014;
3. 浙江大学材料科学与工程学院, 浙江杭州 310013

基金项目:

浙江省自然科学基金(LQ16E020002)；浙江省高等学校访问学者课题(FX2018141)；浙江省教育厅课题(Y201840142)；杭州市131人才项目基金

详细信息

作者简介:
董虹星(1981-),女,博士研究生,副教授,研究方向为新材料制备与改性研究,E-mail:donghx20004@163.com

中图分类号: TF823
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- 被引次数: 0
出版历程
- 收稿日期: 2020-03-19

Preparation of Nano-TiO₂ Thin Film by Agar Coating Method and Its Photocatalytic Degradation Performances

1. College of Electromechanical Engineering, Hangzhou Polytechnic, Hangzhou 311402, Zhejiang, China;
2. College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, Zhejiang, China;
3. School of Materials Science and Engineering, Zhejiang University, Hangzhou 310013, Zhejiang, China

摘要

摘要: 采用琼脂包覆法制备TiO₂纳米薄膜,并研究所制备的TiO₂纳米薄膜的光催化性能。用XRD、BET、FESEM、FTIR、EDX和紫外—可见漫反射光谱等方法对薄膜进行了表征。结果表明,采用琼脂包覆法可以减小TiO₂的粒径到20 nm,而采用一般溶胶凝胶法制备的TiO₂晶粒尺寸为30 nm左右。琼脂包覆法制备的TiO₂薄膜粒子均匀分布,无裂纹。紫外—可见漫反射光谱的结果分析表明,采用琼脂包覆法制备的TiO₂纳米薄膜具有更小的带隙,120 min内对亚甲基蓝的去除率达到71%。且在5次循环处理之后,琼脂包覆法制备的TiO₂纳米薄膜仍然保持很高的活性。依据反应特性对添加了琼脂的TiO₂形成薄膜的机理进行了探讨。
- TiO₂ /
- 纳米薄膜 /
- 琼脂包覆法 /
- 光催化性能 /
- 亚甲基蓝 /
- 降解率
Abstract: Nano-TiO₂ thin films were prepared by agar coating method,and the photocatalytic properties of the prepared TiO₂ thin films were studied.The thin films were characterized by XRD,BET,FESEM,FTIR,EDX and UV-Vis DRS.The results show that the crystal size of TiO₂ prepared by agar coating can be reduced to 20 nm,while the crystal size of TiO₂ prepared by common sol-gel method is about 30 nm.The surface images show that the nano-TiO₂ thin films prepared by agar coating are uniformly distributed and have uniform morphology without crack.The results of UV-Vis DRS show that the bandgap of TiO₂ is reduced by adding agar,and the removal efficiency of methylene blue by the prepared TiO₂ is 71% in 120 min.The activity of TiO₂ remains at high level after 5 cycles of methylene blue treatment.The formation mechanisms of coating of nano-TiO₂ are also discussed based on the reaction characteristics.
- TiO₂ /
- nano thin films /
- agar coating method /
- photocatalysis /
- methylene blue /
- removal rate