UV-vis light responsive Bi2WO6 nanosheet/TiO2 nanobelt heterojunction photo-catalyst for CO2 reduction

被引：33
作者：
Ahmadi, Maryam [1 ]
Alavi, Seyed Mehdi [1 ]
Larimi, Afsanehsadat [2 ]
机构：
[1] Iran Univ Sci & Technol, Sch Chem Petr & Gas Engn, Catalyst & Nanomat Res Lab CNMRL, Tehran, Iran
[2] Niroo Res Inst, Dept Chem & Proc Engn, Tehran, Iran
来源：
CATALYSIS COMMUNICATIONS | 2023年 / 179卷
关键词：
Bi2WO6; TiO2; Photocatalyst; CO2; conversion; ENHANCED PHOTOCATALYTIC ACTIVITY; OXYGEN VACANCY DEFECTS; HYDROTHERMAL SYNTHESIS; NANOSHEETS/TIO2; NANOBELTS; TIO2; DEGRADATION; HETEROSTRUCTURE; PHOTOREDUCTION; SURFACE; PERFORMANCE;
D O I：
10.1016/j.catcom.2023.106681
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：
A series of Bi2WO6/TiO2 composite photocatalysts with different ratios of Bi2WO6 nanosheets to TiO2 nanobelts (1,1/2, 1/3 and 1/4) were synthesized by hydrothermal method and evaluated for CO2 photoreduction. The struc-tural and optical properties of these photocatalysts were investigated by XRD, N2-physisorption, EDX, FESEM, Raman, TPD, DRS and PL. Bi2WO6/TiO2 composite photocatalysts show enhanced CO2 adsorption capacity and coversion performance compared to both pure TiO2 and bulk Bi2WO6. Loading Bi2WO6 nanosheets on TiO2 nanobelts leads to formation a heterojunction, which enhances the photocatalytic visible light performance by decreasing the recombination rate of photoinduced electron-hole pairs. The maximum CH4 production of 18.95 mu mol/gcat in 8 h has been reported for composite with Bi2WO6/TiO2 ratio of1/2, which is 3 times higher than that of bulk Bi2WO6 and pure TiO2.
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页数：13
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