▎ 摘　　要

NOVELTY - A composite photocatalytic material comprises organic metal framework as carrier, nano tin dioxide dispersed on surface of organic metal framework, and graphene covered on organic metal framework/nano tin dioxide composite material. The organic metal framework is UiO66. USE - Composite photocatalytic material used for visible light catalysis and degradation of pollutants (claimed), particularly rhodamine B. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of composite photocatalytic material comprising: (A) adding anhydrous zirconium tetrachloride, terephthalic acid and acetic acid in N,N-dimethylamide, ultrasonically dispersing for 15-30 minutes, transferring to hydrothermal reaction kettle, standing at 100-150 degrees C for 12-36 hours, taking out, cooling to room temperature, centrifuging, removing solvent, washing for 3 times with dimethylformamide and methanol and vacuum-drying at room temperature to obtain white solid of organic metal framework UiO66; (B) dispersing stannic chloride pentahydrate in deionized water, adjusting pH to less than 7, stirring at 60-80 degrees C for 8-12 hours, adding UiO66, ultrasonically processing for 15-30 minutes, transferring to hydrothermal reaction kettle, standing at 100-150 degrees C for 10-18 hours, taking out, cooling to room temperature, centrifuging, washing and vacuum-drying at 40 degrees C to obtain white solid of organic metal framework/nano tin dioxide composite material; and (C) dispersing organic metal framework/nano tin dioxide composite material and graphene oxide in ethanol, ultrasonically processing for 15-30 minutes, transferring to hydrothermal reaction kettle, taking out, cooling to room temperature, standing at 100-150 degrees C for 12-24 hours, centrifuging, washing and vacuum-drying at 40 degrees C to obtain gray solid.