YANG Dequan, YANG Rui, TANG Dafu, LIU Bingxin, DUAN Junyuan

(School of Mechanical Engineering, Qinghai University, Xining 810016, China)

Abstract: The principle of photocatalytic water splitting, the concept of Schottky junction and surface plasmon resonance, and the working mechanisms of plasmonic metal over water splitting were described. The research progress of Au and Ag based semiconductor photocatalysts, series of silver compounds and non-noble metal based semiconductor photocatlysts were systematically introduced. The improved photocatalytic performance for the metal nanoparticles can be attributed to the following two issues. First, the work function of metal is larger than that of semiconductor, and the formation of Schottky junction can realize the spatial transfer of photo-excited-charge carriers. Second, the local surface plasmon resonance effect can expand the spectral absorption, enhance the charge separation efficiency by means of plasmon induced resonance energy transfer, enlarged local electromagnetic field, and the energetic hot electrons injection mechanism, and so on. Although much progress has been reported, plasmonic photocatalysis is still in an early stage. There are still some unsolved problems in this field. It mainly focuses on the precious metals Au and Ag and so forth. Their working principle needs to be further studied. The combination of theory and experiment, the development of cheap non-precious metal substitutes are of the urgent expectation.

Keywords: photocatalytic water splitting; surface plasmon resonance; Schottky junction; plasmonic photocatalysis; nobel metal

中图分类号：TK91

文献标志码：A

文章编号：1008-5548(2019)01-0007-07

DOI:10.13732/j.issn.1008-5548.2019.01.002

收稿日期： 2018-09-20，修回日期：2018-11-07，在线出版时间：2018-12-23 07:00。

基金项目：国家自然科学基金项目，编号：21804078；教育部春晖计划项目，编号：Z2015040；青海省自然科学基金项目，编号：2015-ZJ-946Q，2017-ZJ-924Q。

第一作者简介：杨德权(1993—)，男，硕士研究生，研究方向为纳米催化材料。E-mail：dequanyang@sina.cn。

通信作者简介：段君元(1983—)，男，博士，副教授，硕士生导师，研究方向为光解水。E-mail：junyuanduan@sina.com。刘秉鑫(1987—)，男，博士，副教授，研究方向为光电功能材料。E-mail：liubx408@nenu.edu.cn。