Photocatalytic material for oil field wastewater treatment as well as preparation method and application of photocatalytic material

The invention relates to a photocatalytic material for oil field wastewater treatment as well as a preparation method and application of the photocatalytic material, in particular to a light glass carrier material loaded nano SiO2 coated TiO2-Sb2O3-Ag2O-Li2O composite photocatalytic material as well as a preparation method and application thereof. The photocatalytic material comprises the following components in percentage by mass: 25%-7% of TiO2, 1.5%-5% of Sb2O5, 1%-3% of Ag2O, 0.3%-0.9% of Li2O, 2%-8% of P2O5 and C, 10%-20% of SiO2 and 60%-70% of a light glass carrier material. The specific gravity is 550-950 kg/m < 3 >, the specific surface area is 5-50 m < 2 >/g, the COD removal rate of simulated lithium-containing oilfield wastewater is 82-89%, the lithium recovery rate is 75-85%, and the lithium adsorption capacity is 1-1.5 mg/g. The preparation method comprises the following steps: forming a gel film from a photocatalytic material precursor hydrosol coated on the surface of a light glass carrier mater