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首页> 外文期刊>Catalysis science & technology >Visible-light-driven photocatalytic CO2 reduction over ketoenamine-based covalent organic frameworks: role of the host functional groups
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Visible-light-driven photocatalytic CO2 reduction over ketoenamine-based covalent organic frameworks: role of the host functional groups

机译：Visible-light-driven二氧化碳光催化还原在ketoenamine-based共价有机框架:主机官能团的作用

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摘要

The photocatalytic conversion of CO2 into valuable chemicals is a promising and sustainable approach for solving the worldwide environmental and energy problems. In the current work, a series of ketoenamine-based covalent organic frameworks (COFs) with different functional groups in the same host framework, named TpBD-X [X = –H2, –(CH3)2, –(OCH3)2, and –(NO2)2], were synthesized to study how different functional groups affect the overall photocatalytic CO2 reduction for the first time. The differences in morphology, light-absorption intensity, and band gap among these functionalized COFs were also investigated. Compared to the electron-withdrawing groups, the electron-donating groups in TpBD can have a stronger conjugation effect and accelerate photogenerated charge separation and transfer, thereby improving the photocatalytic performance for CO2 reduction. This work is beneficial for the understanding of the effects of the functional groups on the light-absorption intensity, band gap, and charge transfer that are key parameters in photocatalysis, and therefore provides a new approach for designing efficient COF-based photocatalysts for CO2 reduction.
机译：二氧化碳的光催化转换成有价值的化学物质是一种很有前途的和可持续的方法为解决全球环境和能源问题。ketoenamine-based共价有机框架与不同的官能团(咖啡)同一主机框架,名叫TpBD-X [X = h2,——(CH3) 2、(甲基)2 - 2 (NO2)],是合成的研究不同的官能团的影响整个光催化二氧化碳的减少已经不是第一次了。光吸收强度,和带隙这些官能团咖啡也被调查。比吸电子集团在TpBD可以电子基组较强的共轭效应和加速photogenerated电荷分离和转移,从而提高光催化性能为减少二氧化碳。的影响的理解官能团的光吸收强度,带隙和电荷转移光催化的关键参数,因此设计有效的提供了一种新方法COF-based催化剂对二氧化碳减排。

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