TiO2 modified g-C3N4 with enhanced photocatalytic CO2 reduction performance

被引：59

作者：

Wang, Huiqin ^{[1
]}

Li, Hongda ^{[1
]}

Chen, Zhuowen ^{[1
]}

Li, Jinze ^{[2
]}

Li, Xin ^{[2
]}

Huo, Pengwei ^{[2
]}

Wang, Qian ^{[1
]}

机构：

[1] Jiangsu Univ, Sch Energy & Power Engn, Zhenjiang 212013, Jiangsu, Peoples R China

[2] Jiangsu Univ, Sch Chem & Chem Engn, Inst Green Chem & Chem Technol, Zhenjiang 212013, Jiangsu, Peoples R China

来源：

SOLID STATE SCIENCES | 2020年 / 100卷

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

TiO2; C3N4; Ball-milling and calcination; Composite photocatalyst; Reduction of CO2; IN-SITU SYNTHESIS; COMPOSITE PHOTOCATALYST; EFFICIENT PHOTOCATALYST; CARBON-DIOXIDE; HETEROJUNCTION; PHOTOREDUCTION; DEGRADATION; HYBRID; NANOCOMPOSITES; PHOTODEGRADATION;

D O I：

10.1016/j.solidstatesciences.2019.106099

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Titanium dioxide (TiO2) modified g-C3N4 for composite photocatalysts were fabricated by using ball-milling and calcination. The physicochemical properties of as-obtained photocatalysts were characterized by XRD, XPS, SEM, TEM, UV-vis DRS, PL and Photocurrents. The results show that the heterostructure successfully formed between TiO2 and C3N4, and the heterostructure could effectively enhance the separation rate of the photogenerated electrons and holes. Also the positions of conduction band (CB) and valence band (VB) changed with improving the amount of TiO2 in the as-prepared photocatalysts. The photocatalytic activities of as-prepared photocatalysts were investigated by photoreduction of CO2, the results exhibit that the composite photocatalysts clearly improve the photoreduction of CO2 to CH4 and CO. The highest yields of CH4 and CO are of 72.2 and 56.2 mu mol g(-1) at an optimized modified amounts of TiO2 under 4 h irradiation of 8 W UV lamp, respectively. The strategy of TiO2 modified C3N4 could successfully obtain effective photocatalyst for CO2 conversion.

引用

页数：7