标题:WS2/Graphitic Carbon Nitride Heterojunction Nanosheets Decorated with CdS Quantum Dots for Photocatalytic Hydrogen Production
作者:Zou, Yajun; Shi, Jian-Wen; Ma, Dandan; Fan, Zhaoyang; Cheng, Linhao; Sun, Diankun; Wang, Zeyan; Niu, Chunming
作者机构:[Zou, Yajun; Shi, Jian-Wen; Ma, Dandan; Fan, Zhaoyang; Cheng, Linhao; Sun, Diankun; Niu, Chunming] Xi An Jiao Tong Univ, Sch Elect Engn, Ctr Nanomat R 更多
通讯作者:Shi, JianWen
通讯作者地址:[Shi, JW]Xi An Jiao Tong Univ, Sch Elect Engn, Ctr Nanomat Renewable Energy, State Key Lab Elect Insulat & Power Equipment, Xian 710049, Shaanxi, Peop 更多
来源:CHEMSUSCHEM
出版年:2018
卷:11
期:7
页码:1187-1197
DOI:10.1002/cssc.201800053
关键词:interfaces; photochemistry; quantum dots; semiconductors; water; splitting
摘要:Two-dimensional/two-dimensional (2D/2D) stacking heterostructures are highly desirable in fabricating efficient photocatalysts because face-to-face contact can provide a maximized interfacial region between the two semiconductors; this largely facilitates the migration of charge carriers. Herein, a WS2/graphitic carbon nitride (CN) 2D/2D nanosheet heterostructure decorated with CdS quantum dots (QDs) has been designed, for the first time. Optimized CdS/WS2/CN without another cocatalyst exhibits a significantly enhanced photocatalytic H-2 evolution rate of 1174.5 mu molh(-1)g(-1) under visible-light irradiation (lambda > 420 nm), which is nearly 67 times higher than that of the pure CN nanosheets. The improved photocatalytic activity can be primarily attributed to the highly efficient charge-transfer pathways built among the three components, which effectively accelerate the separation and transfer of photogenerated electrons and holes, and thus, inhibit their recombination. Moreover, the extended light-absorption range also contributes to excellent photocatalytic efficiency. In addition, the CdS/WS2/CN photocatalyst shows excellent stability and reusability without apparent decay in the photocatalytic H-2 evolution within 4 cycles in 20 h. It is believed that this work may shed light on specifically designed 2D/2D nanosheet heterostructures for more efficient visible-light-driven photocatalysts.
收录类别:EI;SCOPUS;SCIE
WOS核心被引频次:3
Scopus被引频次:4
资源类型:期刊论文
原文链接:https://www.scopus.com/inward/record.uri?eid=2-s2.0-85043354906&doi=10.1002%2fcssc.201800053&partnerID=40&md5=831971bf2a3c05aac1c5003da03a74c0
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