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.

Key Laboratory of Eco-Environment-Related Polymer Materials,Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials,College of Chemistry and Chemical Engineering,Northwest Normal University,Lanzhou 730070,Gansu,China;Department of Physics,Oxide Research Center,and Memory and Catalyst Research Center,Hankuk University of Foreign Studies,Yongin 17035,Republic of Korea;Key Laboratory for Photonic and Electronic Bandgap Materials,Ministry of Education,School of Physics and Electronic Engineering,Harbin Normal University,Harbin 150025,Heilongjiang,China;School of Environmental Science and Engneering,Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of Ministry of Education,Chang'an University,Xi'an 710054,Shaanxi,China

[1]Lei Wang;Guofang Huang;Liang Zhang;Rui Lian;Jingwei Huang;Houde She;Chunli Liu;Qizhao Wang-.Construction of TiO2-covalent organic framework Z-Scheme hybrid through coordination bond for photocatalytic CO2 conversion)[J].能源化学,2022(01):85-92

porphinato,CuTAPP,isonicotinic,tmol,phyrin

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