Z-scheme heterojunction through interface engineering for broad spectrum photocatalytic water splitting

被引:80
作者
Xu, Shu [1 ]
Gong, Shuaiqi [1 ]
Jiang, Hua [1 ]
Shi, Penghui [1 ]
Fan, Jinchen [1 ]
Xu, QunJie [1 ,2 ]
Min, YuLin [1 ,2 ]
机构
[1] Shanghai Univ Elect Power, Shanghai Key Lab Mat Protect & Adv Mat Elect Powe, Shanghai 200090, Peoples R China
[2] Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China
基金
中国国家自然科学基金;
关键词
Photocatalyst; Z-type heterojunction; NIR light; TUNGSTEN NITRIDE NANOSHEETS; BLACK PHOSPHORUS; HYDROGEN EVOLUTION; CARBON DOTS; ELECTROCATALYST; DEGRADATION; PERFORMANCE; GRAPHENE; OXIDE; WN;
D O I
10.1016/j.apcatb.2020.118661
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
In this paper, we have designed the composite material of black phosphorus/tungsten nitride (BP/WN) with near-infrared light (NIR light) response as a noble-metal free photocatalyst for the first time. Modification of bulk BP by ball milling can control the band gap of the composite material to achieve efficient photocatalytic hydrogen evolution in the near-infrared region. At wider than 420 nm, and with illumination wider than 700 nm, a certain amount of hydrogen can be produced without any hole quencher. The rate of photocatalytic hydrogen evolution from pure water reaches 10.77 mu molg(-1)h(-1) under NIR light without any cocatalyst. The presence of a Z-type heterojunction effectively separates photogenerated carriers and prolongs the lifetime of photogenerated carriers, thereby enhancing the photocatalytic performance. The results indicate that BP/WN photocatalysts can provide a new approach to artificial photosynthesis and renewable energy conversion.
引用
收藏
页数:12
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