A highly stable TiO2/covalent organic framework heterojunction photocatalyst boosting charge transfer for visible-light-driven CO2 reduction

In this study, we present a novel heterojunction photocatalyst (TiO2-TTCOF) boosting charge transfer for visible-light-driven CO2 to CO conversion without photosensitizer or sacrificial agents. The 10 % TiO2-TTCOF heterojunction photocatalyst is able to catalyze CO2 conversion, resulting in a highest CO production rate of 139.1 μmol g−1 with a selectivity of 96 % and O2 production rate of 73.1 μmol g−1. Additionally, time-resolved fluorescence decay spectra confirmed the heterostructure between TTCOF and TiO2 can promote photoelectron transfer. The ATR-IFTS spectra indicated the photocatalytic reaction pathway.