Facile synthesis of high quality Z-scheme W18O49 nanowire-g-C3N4 photocatalyst for the enhanced visible light-driven photocatalytic hydrogen evolution

被引:38
作者
Zhang, Jinhong [1 ]
Liu, Jincheng [1 ]
Zhao, Wei [1 ]
Ding, Zhongxiang [1 ]
Mai, Jijin [1 ]
Fang, Yanxiong [1 ]
机构
[1] Guangdong Univ Technol, Sch Chem Engn & Light Ind, Guangzhou, Guangdong, Peoples R China
基金
中国国家自然科学基金;
关键词
W18O49; nanowire; Z-scheme; Graphitic carbon nitride; Photocatalytic hydrogen evolution; TUNGSTEN-OXIDE NANOWIRES; NEAR-INFRARED ABSORPTION; WATER; WO3; REDUCTION; G-C3N4; OXYGEN; NANOPARTICLES; GENERATION; TIO2;
D O I
10.1016/j.jallcom.2018.06.045
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
Novel Z-scheme W18O49 nanowire-g-C3N4 nanosheet composite photocatalysts were prepared by a facile solvothermal process. The morphology of W18O49 nanocrystals was significantly changed from urchin sphere to nanowire bundles with the increase of C3N4 quantity. The W18O49-g-C3N4 composites enhance the ability of harvesting visible light, and promote the charge transfer across the composite interface. All the as-prepared composites show higher photocatalytic activity of hydrogen production than that of pure W18O49 and g-C3N4. And the WCN50 composite with 50 mg of g-C3N4 displays the optimal photocatalytic activity with the highest hydrogen production rate of 1.700 mmol g(-1) h(-1) under visible light-irradiation. The improved photocatalytic activity is due to the stronger light harvesting ability, the Z-scheme charge transfer mechanism to promote the interface charge transfer, and the prolonged lifetime of photogenerated electrons. Our work will provide a valuable reference for the design of highly efficient Zscheme photocatalysts for efficiently converting solar energy into chemical fuels. (C) 2018 Elsevier B.V. All rights reserved.
引用
收藏
页码:1 / 9
页数:9
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