航空学报 > 2014, Vol. 35 Issue (10): 2865-2872   doi: 10.7527/S1000-6893.2014.0148

ZnO/Ni-Bi复合光阳极的制备及其光电催化氧化水性能

于浩, 谢永红, 许頔, 项民, 刁鹏   

  1. 北京航空航天大学 材料科学与工程学院, 北京 100191
  • 收稿日期:2014-04-22 修回日期:2014-07-09 出版日期:2014-10-25 发布日期:2014-07-11
  • 通讯作者: 刁鹏,Tel.:010-82339562 E-mail:pdiao@buaa.edu.cn E-mail:pdiao@buaa.edu.cn
  • 作者简介:于浩 男,硕士研究生。主要研究方向:光电催化材料。 Tel:010-82316841 E-mail:yoho1989@163.com;刁鹏 男,博士,教授,博士生导师。主要研究方向:能源材料、太阳能转化与存储、电池材料、电化学与光电化学、纳米材料技术。 Tel:010-82339562 E-mail:pdiao@buaa.edu.cn
  • 基金资助:

    国家自然科学基金(21173016,20973020);北京自然科学基金(2142020);国家教育部博士点专项基金(20101102110002)

Preparation and Photoelectrochemical Water Oxidation Properties of ZnO/Ni-Bi Composite Photoanodes

YU Hao, XIE Yonghong, XU Di, XIANG Min, DIAO Peng   

  1. School of Materials Science and Engineering, Beihang University, Beijing 100191, China
  • Received:2014-04-22 Revised:2014-07-09 Online:2014-10-25 Published:2014-07-11
  • Supported by:

    National Natural Science Foundation of China (201173016, 20973020);Beijing Natural Science Foundation (2142020);Doctoral Fund of Ministry of Education of China (20101102110002)

摘要:

利用沉淀预处理在基底上生长晶种的方法,在氧化铟锡(ITO)导电玻璃表面水热生长出分布均匀、与基底结合牢固、具有较高光电催化分解水制氧性能的ZnO纳米棒。用电助光沉积的方法将电催化剂Ni-Bi与ZnO复合,用扫描电子显微镜(SEM)、X射线衍射(XRD)及紫外可见漫反射光谱对ZnO/Ni-Bi复合光阳极的结构进行了表征,并采用电化学和光电化学技术研究了ZnO/Ni-Bi复合光阳极的光电催化分解水性能,对不同的复合方式、复合时间以及热处理对复合结构催化活性的影响进行了研究。复合Ni-Bi后,ZnO的性能获得了最高40%的提升。光阳极表面沉积的Ni-Bi分离电子空穴抑制其复合,有效地利用了ZnO产生的光生空穴,将水氧化形成氧气,从而显著提高了光照条件下ZnO催化氧化水的效率。

关键词: 水热合成, ZnO纳米棒, 电助光沉积Ni-Bi, 分解水, 制氧

Abstract:

ZnO nanorods were hydrothermally synthesized on the surface of indium tin oxide glass using precipitate pre-treating method. The ZnO nanorods were uniformly and firmly grown on the indium tin oxide glass and possesed high photoelectrochemical oxygen evolution performance. Then electriocatalysis Nickel-borate were deposited onto the surface of ZnO with electro-assisted photodeposition method. The composite photoanodes were characterized by scanning electron microscopy (SEM), X-ray diffraction(XRD) and the UV-vis diffuse reflection spectroscopy, and the photoelectrochemical water oxidation properties of ZnO/Ni-Bi composite photoanodes were investigated by electrochemical and photoelectrochemical methods. The effect of deposition methods, deposition time and heat treatment progress to the photoelectrochemical oxygen evolution performance of the ZnO/Ni-Bi composited photoanodes were invesigated. The performance of ZnO is improved for as high as 40% after coupling with Ni-Bi. The high oxygen evolution activity of the composite photoanodes can be attributed to seperation and inhibit of hole-electron recombination by Ni-Bi through facilitating the transfer of photon-induced holes from ZnO for water oxidation.

Key words: hydrothermal synthesis, zinc oxide nanorods, electro-assisted photodeposition of Ni-Bi, watersplitting, oxygen evolution

中图分类号: