▎ 摘　　要

NOVELTY - Visible light catalyst is doped graphene-modified hexagonal crystal type tungsten trioxide nanocomposite photocatalyst having graphene content of 0.1-1.0 mass%. USE - Visible light catalyst used for oxidative degradation of industrial wastewater and industrial dye and photocatalytic decomposition of water into oxygen (all claimed). ADVANTAGE - The visible light catalyst has improved photocatalytic activity and good response in the visible light area and realizes efficient production of hydrogen. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of visible light catalyst by solvothermal one-step synthesis comprising preparing microemulsion using 9-12 wt.% ammonium m-tungstate dihydrate, 72-78 wt.% deionized water, 8-10 wt.% ethanol, 2-4 wt.% propanol and 1-2 wt.% acetone and strongly stirring, dropwise adding concentrated hydrochloric acid until precipitates are completely dissolved, adding 0.01-0.5 mass% graphene oxide solution, adding diluted hydrochloric acid to adjust the pH at 0.5-2, continuously stirring for 10-30 minutes, transferring to high temperature hydrothermal reaction kettle, heat preserving at 120-200 degrees C for 12-72 hours, naturally cooling to room temperature, centrifuging, water washing and alcohol washing, vacuum drying and grinding to obtain the product.