The invention discloses a composite-photocatalyst-supported
silicon material preparation method, which specifically comprises: (1) pre-treating raw materials; (2) loading a
titanium dioxide carrier; (3) preparing an inner layer solution; (4) preparing an outer layer solution; (5) carrying out primary impregnation; and (6) carrying out secondary impregnation. According to the present invention, the
silicon material is subjected to the heat treatment by adding the strong alkali solution, such that the
controllability is strong, and the too low
surface energy of the
silicon material is easily increased; by using the Ti3+ in-situ assisted reduction method, the
noble metal nanoparticles are uniformly distributed on the carrier
titanium dioxide surface, such that the loading distribution is uniform, the interface binding is
solid, and the photo-oxidation reaction is efficiently and selectively performed; the
microwave radiation treatment is performed in the inner solution, such that the conditions are mild, the
reaction rate is rapid, and the yield is high; and the carbon atoms of the
graphene adopt the sp2 hybridization linkage, such that the good adsorption ability to pollutants is provided, the obtained silicon material loads the
graphene, the high
structural stability and the
thermal stability are provided, and the adsorption capacity of the material under the mild condition is effectively improved.