异质结
材料科学
制作
光催化
选择性
还原(数学)
光电子学
化学工程
纳米技术
金属有机骨架
催化作用
化学
工程类
替代医学
有机化学
吸附
病理
几何学
医学
生物化学
数学
作者
Chen Zhao,Awu Zhou,Yibo Dou,Jian Zhou,Junfeng Bai,Jiànróng Lǐ
标识
DOI:10.1016/j.cej.2021.129155
摘要
Developing efficient photocatalysts for CO2 reduction into value-added chemical feedstocks is of significance. Heterojunction photocatalysts are promising candidates but still suffering from the insufficient electron-hole pair separation issues. Herein, a strategy that dual metal–organic frameworks (MOFs) template-directed fabrication of carbon-supported heterojunction, C-In2O3@MO (MO = ZnO, Co3O4, and ZnCo2O4) with tunable band matching structure was developed. The resultant hollow- structured C-In2O3@ZnCo2O4 shows high CO2 reduction activity towards CO (44.1 μmol g1 h−1) with a selectivity of 66%. The superior performance of this material could be ascribed to the suitable energy band matching and efficient internal charge transfer on p-n heterojunction, which facilitates electron-hole separation. Meanwhile, the hollow cavity not only improved light-harvesting capability through multiple light reflection and scattering in the internal voids but also provided large surface area for exposing active sites to promoting the activation of CO2. This study thus proposes a feasible approach to adjust the heterojunction structure of photocatalysts to achieve efficient CO2 reduction reaction.
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