物理化学学报 >> 2014, Vol. 30 >> Issue (8): 1535-1542.doi: 10.3866/PKU.WHXB201405221

催化和表面科学 上一篇    下一篇

脉冲沉积制备Cu2O/TiO2纳米管异质结的可见光光催化性能

张剑芳1,3, 王岩2,3, 沈天阔2,3, 舒霞2,3, 崔接武2,3, 陈忠2,4, 吴玉程2,3   

  1. 1. 合肥工业大学化学工程学院, 合肥 230009;
    2. 合肥工业大学材料科学与工程学院, 合肥 230009;
    3. 先进功能材料与器件安徽省重点实验室, 合肥 230009;
    4. 南洋理工大学材料科学与工程学院, 新加坡 639798
  • 收稿日期:2014-03-21 修回日期:2014-05-22 发布日期:2014-07-18
  • 通讯作者: 王岩, 吴玉程 E-mail:stone@hfut.edu.cn;ycwu@hfut.edu.cn
  • 基金资助:

    国家自然科学基金(51302060,51128201,51272062,51311130317),高等学校博士学科点专项科研基金(20130111120019),安徽省自然科学基金(1308085QE74)和中央高校基本科研业务费专项资金(2012HGBZ0648)资助项目

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

ZHANG Jian-Fang1,3, WANG Yan2,3, SHEN Tian-Kuo2,3, SHU Xia2,3, CUI Jie-Wu2,3, CHEN Zhong2,4, WU Yu-Cheng2,3   

  1. 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).

摘要:

在用阳极氧化法制备有序排列TiO2纳米管阵列薄膜的基础上,引入脉冲沉积工艺,成功实现了均匀、弥散分布的Cu2O纳米颗粒修饰改性TiO2纳米管阵列,形成Cu2O/TiO2 纳米管异质结复合材料. 利用场发射扫描电镜(FESEM)、场发射透射电镜(FETEM)、X射线衍射(XRD)、X射线光电子能谱(XPS)和紫外-可见漫反射光谱(UV-Vis DRS)对样品进行表征,重点研究了Cu2O/TiO2 纳米管异质结的光电化学特性和对甲基橙(MO)的可见光催化降解性能. 结果表明,Cu2O纳米颗粒均匀附着在TiO2纳米管阵列的管口和中部位置,所制备的Cu2O/TiO2 纳米管异质结具有高效的可见光光催化性能;在浓度为0.01 mol·L-1的CuSO4溶液中制得的Cu2O/TiO2纳米管异质结表现出最好的电化学特性和光催化性能;另外,对Cu2O纳米颗粒影响光催化活性的机理进行了讨论.

关键词: TiO2纳米管阵列, 脉冲沉积, Cu2O/TiO2纳米管异质结, 光电化学性能, 光催化

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

MSC2000: 

  • O648