▎ 摘　　要

NOVELTY - Preparing photodegradation catalyst comprises e.g. dissolving tungstate in deionized water, recording as liquid A, dissolving the nickel salt in deionized water, recording as liquid B, heating liquid A, dropping B into liquid A, stirring, filtering, washing the precipitate, drying, calcining to obtain nickel tungsten oxide, synthesizing bismuth oxide/nickel tungsten oxide, dispersing the nickel tungsten oxide in a mixed solution of organic solvent and deionized water, adding halogen salt, stirring, transferring the solution to a hydrothermal reaction kettle, crystallizing, centrifuging to obtain the precipitate, drying to obtain the composite material bismuth oxide/nickel tungsten oxide, dispersing the bismuth oxide/nickel tungsten oxide in an organic solvent, adding the freeze-dried graphene oxide, stirring, transferring the mixed solution into the reaction kettle, crystallizing to finally obtain graphene oxide/ bismuth oxide/nickel tungsten oxide. USE - The method is useful for preparing photodegradation catalyst, which is useful for organic pollutant. ADVANTAGE - The photodegradation catalyst: has strong photoelectron transmission capability and adsorption capacity to the organic pollutant; adopts the composite of the three materials, which can make the organic pollutant quickly adsorbed and removed by light degradation. DETAILED DESCRIPTION - Preparing photodegradation catalyst comprises (1) synthesizing nickel tungsten oxide, (a) dissolving tungstate in deionized water so that the mass concentration is between 0.1 and 10 g/l, recording as liquid A, (b) dissolving the nickel salt in the same molar amount as tungstate in deionized water so that the mass concentration is 0.1-10 g/l, recording as liquid B, (c) heating liquid A to 30-80degreesC under magnetic stirring, dropping B into liquid A, and stirring for 6-48 hours, (a) stirring, filtering and washing the precipitate for 3-5 times, drying at 60-90degreesC for 10-24 hours, calcining the dried sample at 400-700degreesC for 3-6 hours to obtain nickel tungsten oxide, (2) synthesizing bismuth oxide/ nickel tungsten oxide, dispersing the nickel tungsten oxide in a mixed solution of organic solvent and deionized water so that the mass solubility is 0.1 -10 g/l, adding halogen salt to the uniformly dispersed solution, stirring for 0.5-3 hours, adding bismuth salt in an equimolar amount with the halogen salt, stirring for 0.5-3 hours, transferring the solution to a hydrothermal reaction kettle, and crystallizing at 120-180degreesC for 12-48 hours, after the reaction, centrifuging to obtain the precipitate, washing with deionized water for 3-5 times, drying at 60-90degreesC for 10-24 hours to obtain the composite material bismuth oxide/nickel tungsten oxide, and (3) dispersing the bismuth oxide/nickel tungsten oxide in an organic solvent, adding the freeze-dried graphene oxide prepared by Hummers method, stirring under magnetic stirring for 0.5-10 hours, transferring the mixed solution into the reaction kettle, and crystallizing at 120-180degreesC for 12-48 hours to finally obtain graphene oxide/ bismuth oxide/nickel tungsten oxide. An INDEPENDENT CLAIM is also included for a method for using photodegradation catalyst comprising promoting the photodegradation of organic pollutants by using catalyst, where the organic pollutants are rhodamine B, methylene blue, methyl orange, phenol, bisphenol A, tetracycline, and antibiotics.