光催化
硫化镉
纳米棒
光致发光
制氢
分解水
光催化分解水
材料科学
量子产额
可见光谱
氢
铜
光化学
硫化铜
无机化学
化学工程
化学
纳米技术
催化作用
光电子学
光学
有机化学
物理
荧光
工程类
冶金
作者
Zijun Sun,Xiang Liu,Qiudi Yue,Hongxing Jia,Pingwu Du
出处
期刊:Chemcatchem
[Wiley]
日期:2015-10-16
卷期号:8 (1): 157-162
被引量:42
标识
DOI:10.1002/cctc.201500789
摘要
Abstract Photocatalytic hydrogen production by means of water splitting has attracted significant attention to convert solar energy into chemical energy. In this present study, a facile one‐step cation exchange approach was used to prepare Cu x S decorated on CdS nanorods (Cu x S/CdS NRs, x =1–2) for enhanced photocatalytic hydrogen production in water under visible light irradiation ( λ >420 nm). Under optimal conditions, the highest H 2 production rate achieved was ≈111 μmol h −1 and the apparent quantum yield reached ≈7 %. Efficient transfer processes of photogenerated charge carriers from CdS to Cu x S, which can be attributed to the uniform distribution of Cu x S on the CdS surface, were confirmed by steady‐state photoluminescence (PL) spectra and time‐resolved photoluminescence spectra. All the results indicate that this low‐cost cation exchange reaction is a promising method to construct an efficient system for photocatalytic hydrogen evolution.
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