g-C3N4-CdS-NiS2 composite nanotube: synthesis and its photocatalytic activity for H2 generation under visible light

被引：0
|
作者：
Chen K. [1 ]
Huang J. [1 ]
机构：
[1] Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, 310018, Zhejiang
来源：
Huagong Xuebao/CIESC Journal | 2020年 / 71卷 / 01期
关键词：
Cadmium sulfide; Catalysis; G-C[!sub]3[!/sub]N[!sub]4[!/sub; Heterojunction; Hydrogen production; Nanotube; Nickel sulfide; Photochemistry; Visible light catalysis;
D O I：
10.11949/0438-1157.20191249
中图分类号：
学科分类号：
摘要：
Rapid recombination of photogenerated electron-hole pairs is one of important factors leading to poor performance of semiconductor photocatalysts. Constructing a heterojunction is an effective method for separation of photogenerated electron-hole pairs. In the present work, g-C3N4-CdS-NiS2 composite nanotube was synthesized via thermal condensation using urea and thiourea as precursors, and subsequent two-step hydrothermal reactions. The photocatalytic activity of g-C3N4-CdS-NiS2 composite was investigated for H2 generation from water using triethanolamine as sacrificial agent under visible light irradiation. The optimal g-C3N4-CdS-NiS2 composite with the content of CdS 10%(mass) produced H2 at a rate of 50.9 μmol•h-1, which is 25 times and 11 times of that of pure g-C3N4 nanotube and g-C3N4-CdS (NiS2) binary composite, respectively. Moreover, cyclic photocatalytic experiments demonstrated the high stability of g-C3N4-CdS-NiS2 composite. The improvement in the photocatalytic performance for H2 production can be mainly attributed to the formation of heterojunction between CdS, NiS2 and g-C3N4 nanotubes, which is beneficial to the separation of photogenerated electron-hole pairs. © All Right Reserved.
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页码：397 / 408
页数：11
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