Black single-crystal TiO2 nanosheet array films with oxygen vacancy on {001} facets for boosting photocatalytic CO2 reduction

被引：67

作者：

Zhang, Wei ^{[1
,2
]}

Xue, Jinbo ^{[1
,2
]}

Shen, Qianqian ^{[1
,2
]}

Jia, Shufang ^{[1
,2
]}

Gao, Jiaqi ^{[1
,2
]}

Liu, Xuguang ^{[1
,2
]}

Jia, Husheng ^{[1
,2
]}

机构：

[1] Taiyuan Univ Technol, Key Lab Interface Sci & Engn Adv Mat, Minist Educ, Taiyuan 030024, Peoples R China

[2] Taiyuan Univ Technol, Coll Mat Sci & Engn, Taiyuan 030024, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2021年 / 870卷

基金：

中国国家自然科学基金;

关键词：

Black TiO2 nanosheets; Oxygen vacancies; {001} facets; Photocatalytic CO2 reduction; Visible light; ANATASE TIO2; HYDROGEN-PRODUCTION; CARBON-DIOXIDE; PHOTOREDUCTION; NANOCRYSTALS; DEGRADATION; PERFORMANCE; RUTILE; H2O; H-2;

D O I：

10.1016/j.jallcom.2021.159400

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：

Black TiO2 nanosheet array films with oxygen vacancy on {001} facets were prepared by solid phase reaction with a mild aluminothermic reduction method. The oxygen vacancies increase the absorption of visible light and the separation efficiency of photogenerated electron-hole pairs. For the black TiO2 with oxygen vacancy prepared by annealing, only the oxygen vacancies on {001} facets boost the photocatalytic CO2 reduction, while these on {101} facets in a small number increase the recombination of photogenerated electrons and holes and inhibit the photocatalytic CO2 reduction performance. Meanwhile, the black TiO2 nanosheet array films with oxygen vacancy on {001} facets have a good photocatalytic CO2 reduction to CO with a reduction rate of 128.5 mu mol.g(-1).h(-1) under visible light irradiation, which is ascribed to the formation of oxygen vacancy and the synergistic effect of special unsaturated coordination Ti-5c atom improving the adsorption capacity of CO2 and increasing the reduction rate of CO2 to CO. (C) 2021 Elsevier B.V. All rights reserved.

引用

页数：10

共 52 条

[1] Facile cd-thiourea complex thermolysis synthesis of phase-controlled CdS nanocrystals for photocatalytic hydrogen production under visible light [J].