Semimetal bismuth mediated UV-vis-IR driven photo-thermocatalysis of Bi4O5I2 for carbon dioxide to chemical energy

被引：48

作者：

Bai, Yang ^{[1
]}

Yang, Ping ^{[1
,3
]}

Wang, Pingquan ^{[1
]}

Xie, Haiquan ^{[2
]}

Dang, Haifeng ^{[4
]}

Ye, Liqun ^{[1
,2
]}

机构：

[1] Southwest Petr Univ, State Key Lab Oil & Gas Reservoir Geol & Exploita, Chengdu 610500, Sichuan, Peoples R China

[2] Nanyang Normal Univ, Coll Chem & Pharmaceut Engn, Engn Technol Res Ctr Henan Prov Solar Catalysis, Collaborat Innovat Ctr Water Secur Water Source R, Nanyang 473061, Peoples R China

[3] Southwest Petr Univ, Coll Chem & Chem Engn, Chengdu 610500, Sichuan, Peoples R China

[4] Dongguan Univ Technol, Environm & Civil Engn, Dongguan 523808, Peoples R China

来源：

JOURNAL OF CO2 UTILIZATION | 2018年 / 23卷

基金：

中国国家自然科学基金;

关键词：

Semimetal; Bismuth; Co-catalyst; Carbon dioxide reduction; Photo-thermocatalysis; MOLECULAR-OXYGEN ACTIVATION; PHOTOCATALYTIC REDUCTION; HYDROTHERMAL SYNTHESIS; INFRARED LIGHT; BISPHENOL-A; FACILE SYNTHESIS; CO2; NANOPARTICLES; FACETS; HETEROJUNCTION;

D O I：

10.1016/j.jcou.2017.11.007

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Semimetal bismuth has attracted extensive interests, which were ascribed to the photo-thermal effect and co-catalyst properties. In this paper, Bi/Bi4O5I2 composites were synthesized through a molecular precursor hydrolytic process, and the sunlight induced semimetal Bi mediated photo-thermocatalysis of Bi4O5I2 for carbon dioxide to chemical energy was studied. When the optimal mole ratio of Bi: I was selected at 1.95: 1, Bi/Bi4O5I2 displayed outstanding photo-thermocatalytic carbon dioxide to chemical energy (CO and CH4). Under simulate sunlight (UV-vis-IR) irradiation, the CO and CH4 generation over Bi/Bi4O5I2 enhanced to 40.02 mu mol h(-1) g(-1), and 7.19 mu mol h(-1) g(-1), respectively. The light to chemical energy (LTCE) conversion efficiency (80.2 x10(-6)) was about 6.47 times than Bi4O5I2 (12.4 x10(-6)), and 68.55 times than Bi4O5I2 without IR irradiation (1.17 x10(-6)). The dramatically enhanced photo-thermocatalysis activity of Bi/Bi4O5I2 can be attributed to the co-catalyst and photo-thermal effect of Bi nanoparticles, which prohibiting the electron-hole recombination and accelerating light to thermal energy conversion, respectively. Furthermore, the enhanced photo-induced carrier separation rate and reaction system temperature of Bi/Bi4O5I2 was testified.

引用

页码：51 / 60

页数：10

共 61 条

[1] Modified TiO2 photocatalyst for CO2 photocatalytic reduction: An overview [J].