Abstract:Photocatalytic reduction technology can convert CO₂ gas into high value-added organics and realize the resource utilization of CO₂.As a common photocatalytic material,titanium dioxide has the advantages of low price and high chemical stability.However,its own spectral response range is narrow,and its electron hole recombination rate is too high,which leads to its catalytic efficiency as a photocatalytic material is greatly reduced,and its photocatalytic performance can be improved by semiconductor recombination.In this paper,cuprous sulfide Cu₂S-TiO₂-X is prepared from thiourea and copper chloride dihydrate.It is compounded to the matrix by high temperature alcoholysis.Its physical properties are studied by means of X-ray diffraction,X-ray electron spectroscopy,scanning electron microscopy,ultraviolet visible light graduator and other characterization methods.The results show that:the photocatalytic reduction of Cu₂S-TiO₂-1.0 is the strongest and its CH₄ yield is 0.12 μmol/(g·h).With the decrease of Cu₂S content,The CH₄ yield increases first and then decreases.