Preparation of Zn₃In₂S₆/TiO₂ for Enhanced CO₂ Photocatalytic Reduction Activity Via Z‐scheme Electron Transfer

Abstract

Abstract Photocatalytic reduction of CO 2 is increasingly attracting research interest for the growing concerns about climate change resulted from the greenhouse effect due to the industrial emission of CO 2 . In this paper, we report the synthesis of Zn 3 In 2 S 6 modified TiO 2 nanocomposite via a facial hydrothermal method. The samples were characterized by photoluminescence spectra (PL), UV‐vis diffuse reflectance spectra (DRS), X‐ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscope (TEM), X‐ray photoelectron spectroscopy (XPS) and energy dispersive X‐ray spectroscopy (EDS). The production rate of CO from CO 2 is dramatically improved over the obtained composite catalyst. The contact between Zn 3 In 2 S 6 and TiO 2 is responsible for this ameliorated photocatalytic activity because of the formation of the Z‐scheme charge transfer mechanism which favors the separation of photo‐induced charges.