Construction of TiO2-covalent organic framework Z-Scheme hybrid through coordination bond for photocatalytic CO2 conversion

• 作者: Lei Wang Guofang Huang Liang Zhang Rui Lian Jingwei Huang Houde She Chunli Liu Qizhao Wang
• 来源期刊: 能源化学
• 年，卷（期）: 2022,（1）
• 页码范围: 85-92
• 页数: 8页
• 语种: 英文

摘要

In this work,a covalent organic framework (COF),which is constructed by the building blocks of[5,10,15,20-tetrakis(4-aminophenyl)porphinato]copper(Ⅱ) (CuTAPP) and p-benzaldehyde,is employed to integrate with TiO2 for the purpose of establishing a Z-scheme hybrid.Within the system,isonicotinic acid performs the role of a bridge that connects the two components through a coordination bond.Further photocatalytic application reveals the hybrid framework is able to catalyze CO2 conversion under simulated solar light,resulting in CO production rate of 50.5 μtmol g-1 h-1,about 9.9 and 24.5 times that of COF and pristine TiO2,respectively.The ameliorated catalytic performance owes much to the por-phyrin block acting as photosensitizer that augments the light absorbance,and the establishment of Z-scheme system between the inorganic and organic components that enhances the separation of the car-riers.In addition,the chemical bridge also ensures a steady usage and stable charge delivery in the catal-ysis.Our study sheds light on the development of versatile approaches to covalently incorporate COFs with inorganic semiconductors.