Noble-metal-free nickel phosphide modified CdS/C3N4 nanorods for dramatically enhanced photocatalytic hydrogen evolution under visible light irradiation

被引:116
作者
Wu, Tengfei [1 ]
Wang, Peifang [1 ]
Qian, Jin [1 ]
Ao, Yanhui [1 ]
Wang, Chao [1 ]
Hou, Jun [1 ]
机构
[1] Hohai Univ, Coll Environm, Minist Educ, Key Lab Integrated Regulat & Resource Dev Shallow, 1 Xikang Rd, Nanjing 210098, Jiangsu, Peoples R China
基金
美国国家科学基金会; 中国国家自然科学基金;
关键词
HIGHLY EFFICIENT; CARBON NITRIDE; H-2; EVOLUTION; G-C3N4; NANOSHEETS; NI2P COCATALYST; WATER; CDS; GENERATION; GRAPHENE; TIO2;
D O I
10.1039/c7dt02929b
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Photocatalytic hydrogen evolution is a promising technology in solving the global energy and environment issues. Therefore, it is urgent to develop highly efficient, nonprecious metal and stable photocatalysts. In this work, we synthesized a highly efficient Ni2P-CdS/g-C3N4 composite based on the concept of combining heterojunction engineering with co-catalyst modification. When employed as a photocatalyst for water splitting, the obtained best composite (5% Ni2P-CdS/g-C3N4) displayed dramatically enhanced hydrogen evolution activity at the rate of 44 450 mu mol h(-1) g(-1), which was about 27 times higher than that of pure CdS (1668 mu mol h(-1) g(-1)). The apparent quantum yield at 420 nm reaches 46.3%. The excellent photocatalytic activity and stability can be ascribed to the synergistic effect of the intimate contact between CdS and g-C3N4 and the surface co-catalyst modification. Specifically, the g-C3N4 coated on the CdS nanorods can effectively promote the electron-hole pair separation spatially and Ni2P can lower the overpotential of H+ reduction.
引用
收藏
页码:13793 / 13801
页数:9
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