光催化
贵金属
材料科学
分解水
三元运算
制氢
纳米结构
化学工程
金属
过渡金属
异质结
氢
纳米技术
催化作用
化学
冶金
光电子学
有机化学
程序设计语言
工程类
计算机科学
作者
Mingmei Wu,Jin Zhang,Chunxiao Liu,Yansheng Gong,Rui Wang,Beibei He,Huanwen Wang
出处
期刊:Chemcatchem
[Wiley]
日期:2018-05-16
卷期号:10 (14): 3069-3077
被引量:81
标识
DOI:10.1002/cctc.201800197
摘要
Abstract Developing low‐cost and efficient noble‐metal‐free photocatalytic materials is crucial for the hydrogen production through water splitting. Herein, N ‐TiO 2 /g‐C 3 N 4 heterostructure loaded with a noble‐metal‐free Ni x P cocatalyst was prepared by the combination of ammonia etching and photo‐reduction deposition method. The results demonstrated that N‐doped TiO 2 ( N ‐TiO 2 ) nanosheets were formed and stood upright on the surfaces of g‐C 3 N 4 nanosheets, forming a 3D structure. The ternary hybridization of N ‐TiO 2 /g‐C 3 N 4 @Ni x P hierarchical nanostructure was a promising strategy to achieve highly efficient photocatalytic H 2 evolution, showing an optimized hydrogen evolution rate of 5438 μmol g −1 ⋅h −1 using 300 W Xe lamp as irradiation source, which was 7.5 times higher than that of N ‐TiO 2 /g‐C 3 N 4 . The enhanced photocatalytic activity was ascribed to the combined effects of Ni x P cocatalyst loading and the formation of the intimate nanoheterojunctions between TiO 2 nanosheets and g‐C 3 N 4 nanosheets, which were favorable for promoting charge transfer. The present work would provide a novel facile preparation and practical application of many other noble‐metal‐free metal phosphides as a highly efficient cocatalyst for hydrogen production through water splitting.
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