材料科学
光催化
煅烧
吸附
可见光谱
制作
催化作用
多孔性
化学工程
分子
离子
纳米技术
光化学
光电子学
复合材料
有机化学
医学
化学
替代医学
病理
工程类
作者
Yanxia Wang,Hong Wang,Jianping Sheng,Fan Dong,Yanjuan Sun
标识
DOI:10.1016/j.surfin.2023.103551
摘要
Photocatalytic CO2 reduction is limited by high reaction barriers of CO2 activation, resulting in low conversion efficiency of light energy to chemical energy, especially within the visible light range. To enhance the performance of photocatalytic CO2 reduction, the rational design of the chemical environment on the catalyst surface is conducive to the activation of reactive molecules. Here, we prepared porous Bi5O7I with surface charge-rich Bi(3−x)+ ions by template calcination. The experimental results show that Bi ions accumulated charges on the surface of Bi5O7I have superior adsorption and activation abilities for CO2 molecules than the precursor BiOIO3. Besides, Bi5O7I exhibits better charge transfer capability and roughly double the catalytic activity under visible light irradiation for CO production. This work developed a new facile approach for fabrication of high-performance photocatalysts and provided new insight on the mechanism of CO2 photoreduction.
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