脉冲沉积制备Cu2O/TiO2纳米管异质结的可见光光催化性能

doi:10.3866/PKU.WHXB201405221

Acta Phys. -Chim. Sin. ›› 2014, Vol. 30 ›› Issue (8): 1535-1542.doi: 10.3866/PKU.WHXB201405221

• CATALYSIS AND SURFACE SCIENCE • Previous Articles Next Articles

Visible Light Photocatalytic Performance of Cu₂O/TiO₂ Nanotube Heterojunction Composites Prepared by Pulse Deposition

ZHANG Jian-Fang^1,3, WANG Yan^2,3, SHEN Tian-Kuo^2,3, SHU Xia^2,3, CUI Jie-Wu^2,3, CHEN Zhong^2,4, WU Yu-Cheng^2,3

1. School of Chemical Engineering, Hefei University of Technology, Hefei 230009, P. R. China;
2. School of Materials Science & Engineering, Hefei University of Technology, Hefei 230009, P. R. China;
3. Key Laboratory of Advanced Functional Materials and Devices of Anhui Province, Hefei 230009, P. R. China;
4. School of Materials Science & Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore

Received:2014-03-21 Revised:2014-05-22 Published:2014-07-18
Contact: WANG Yan, WU Yu-Cheng E-mail:stone@hfut.edu.cn;ycwu@hfut.edu.cn
Supported by:
The project was supported by the National Natural Science Foundation of China (51302060, 51128201, 51272062, 51311130317), Specialized Research Fund for the Doctoral Program of Higher Education, China (20130111120019), Natural Science Foundation of Anhui Province, China (1308085QE74), and Fundamental Research Funds for the Central Universities, China (2012HGBZ0648).

Abstract

Abstract:

Highly ordered TiO₂ nanotube arrays (TNAs) were fabricated by an electrochemical anodization process and Cu₂O nanoparticles were subsequently deposited onto these TNAs via pulse deposition to form Cu₂O/TiO₂ nanotube heterojunction composite materials. Samples were characterized by field emission scanning electron microscopy (FESEM), field emission transmission electron microscopy (FETEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and UV-Vis diffusion reflection spectroscopy (DRS). The photocatalytic performances of the Cu₂O/TiO₂ composites were investigated by following the visible-light induced photocatalytic decomposition of methyl orange (MO). The results indicated that the inner surfaces and interfaces of the TNAs had been successfully modified with uniformly distributed Cu₂O nanoparticles, and that these composites could effectively improve the visible light photocatalytic performance. The Cu₂O/TiO₂ nanotube composite obtained using 0.01 mol·L^-1 CuSO₄ solution exhibited the best photocurrent and photocatalytic performance. Based on the results obtained, a possible photocatalytic mechanism is also discussed.

Key words: TiO₂ nanotube array, Pulse deposition, Cu₂O/TiO₂ nanotube heterojunction, Photoelectrochemical property, Photocatalysis

ZHANG Jian-Fang, WANG Yan, SHEN Tian-Kuo, SHU Xia, CUI Jie-Wu, CHEN Zhong, WU Yu-Cheng. Visible Light Photocatalytic Performance of Cu₂O/TiO₂ Nanotube Heterojunction Composites Prepared by Pulse Deposition[J].Acta Phys. -Chim. Sin., 2014, 30(8): 1535-1542.

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Visible Light Photocatalytic Performance of Cu₂O/TiO₂ Nanotube Heterojunction Composites Prepared by Pulse Deposition

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