Construction of Au/CuO/Co3O4 Tricomponent Heterojunction Nanotubes for Enhanced Photocatalytic Oxygen Evolution under Visible Light Irradiation

被引：34

作者：

Hu, Guowen ^{[1
]}

Hu, Chen-Xia ^{[1
]}

Zhu, Zhi-Yuan ^{[1
]}

Zhang, Lei ^{[1
]}

Wang, Qiang ^{[1
]}

Zhang, Hao-Li ^{[1
]}

机构：

[1] Lanzhou Univ, State Key Lab Appl Organ Chem, Coll Chem & Chem Engn, Key Lab Special Funct Mat & Struct Design,MOE, Lanzhou 730000, Gansu, Peoples R China

来源：

ACS SUSTAINABLE CHEMISTRY & ENGINEERING | 2018年 / 6卷 / 07期

基金：

中国国家自然科学基金;

关键词：

Heterojunction; Nanotube; Photocatalysis; Oxygen evolution; Visible light irradiation; FERMI-LEVEL EQUILIBRATION; WATER OXIDATION; HYDROGEN-GENERATION; CHARGE SEPARATION; QUANTUM DOTS; Z-SCHEME; EFFICIENT; SOLAR; OXIDE; NANOCRYSTALS;

D O I：

10.1021/acssuschemeng.8b01153

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Semiconductor-metal heterojunctions are widely used in the design of photocatalyst for water splitting and organic compound degradation. In this work we introduced the design and fabrication of Au/CuO/Co3O4 tricomponent heterojunction to produce oxygen efficiently through photocatalysis of water. A facile and universal strategy was employed to prepare Au/CuO/Co3O4 tricomponent nanotubes. The CuO/Co3O4 nanotubes were first synthesized by electrospinning technique and subsequent thermal treatment. Upon visible light excitation, the CuO/Co3O4 nanotubes in the presence of HAuCl4 center dot 4H(2)O readily transformed into Au/CuO/Co3O4 heterojunction nanotubes. These tricomponent heterostructures demonstrated high O-2 generation rate of 2.92 mmol h(-1)g(-1) during the photocatalytic process, a value much larger than that of CuO/Co3O4 nanotube control. The work suggests that the design of tricomponent heterojunctions integrating semiconductor-semiconductor and semiconductor-metal heterojunctions could be an effective route to raise photocatalytic oxygen production efficiency under solar light.

引用

页码：8801 / 8808

页数：15

共 69 条

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