In-situ synthesis method and application of bismuth oxychloride carbon-based composite material

The invention discloses an in-situ synthesis method of a bismuth oxychloride carbon-based composite material, which comprises the steps of (1) dissolving a bismuth source in an alcoholic solution, adding a carbon material, and carrying out ultrasonic dispersion to obtain a dispersion liquid A; and (2) dissolving vitamin B1 hydrochloride in water, then dropwise adding into the dispersion liquid A under stirring, and washing and drying after reaction to obtain the bismuth oxychloride carbon-based composite material. According to the preparation method, acid, alkali and a surfactant are not used in the preparation process, the bismuth oxychloride carbon-based composite material with the uniform petal-shaped structure can be obtained through a simple liquid phase synthesis method, degradation of dye and volatile organic pollutants (VOCs) can be efficiently catalyzed under the visible light condition, and the activity of the composite material is almost unchanged after the composite material is recycled for multip