堆积
光催化
超分子化学
共价键
卟啉
共价有机骨架
异质结
材料科学
可见光谱
多孔性
辐照
电子受体
载流子
纳米技术
电子转移
化学
光化学
化学工程
光电子学
结晶学
有机化学
催化作用
复合材料
晶体结构
工程类
物理
核物理学
作者
Shao–Shuai Zhao,Jun Liang,Duan‐Hui Si,Min‐Jie Mao,Yuan‐Biao Huang,Rong Cao
标识
DOI:10.1016/j.apcatb.2023.122782
摘要
Photocatalytic conversion of CO2 into value–added chemicals under visible light irradiation is very appealing but challenging due to the easy recombination of hole–electron pairs in traditional photocatalysts. π–π stacking interactions can be favorable for efficient separation and transfer of photo–irradiated charges to promote photocatalysis, but are rarely studied in crystalline porous frameworks like covalent organic frameworks (COFs). Herein, we report a series of thienothiophenes–porphyrin based 2D COFs, denoted as TT–Por(M)–COF (M = 2 H/Co/Cu/Ni), which show enhanced intralayer and interlayer charge separation and migration due to the donor-acceptor heterojunctions and π–stacked columns. The TT–Por(Co)–COF achieves enhanced CO evolution rate than COF–366–Co without the heterojunctions and π–columns (10.05 mmol g–1 h–1 versus 7.10 mmol g–1 h–1) under visible light irradiation. This work not only shows the important role of π–π stacking interactions of COFs for CO2 conversion, but also provides insight into the mechanistic aspect for photocatalysis.
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