▎ 摘　　要

NOVELTY - Preparing tungsten doped titanium dioxide/graphene composite comprises e.g. dissolving graphene oxide in absolute ethanol, adding tetrabutyl titanate, stirring to obtain uniform suspension, adding sodium tungstate dihydrate aqueous solution into the above suspension, stirring, transferring obtained homogeneous suspension with stirring into a 100 ml high-pressure hydrothermal reaction vessel lined with polytetrafluoroethylene, allowing to stand, naturally cooling, washing with deionized water and ethanol for many times, centrifuging, drying under nitrogen atmosphere and then heating. USE - The method is useful for preparing tungsten doped titanium dioxide/graphene composite. ADVANTAGE - The composite: has high catalytic degradation activity under visible light; and enhances the ability of absorbing visible light. DETAILED DESCRIPTION - Preparing tungsten doped titanium dioxide/graphene composite comprises (i) dissolving 50-100 mg graphene oxide in 50 ml absolute ethanol for 1 hours, adding 7 ml tetrabutyl titanate, stirring for 10 minutes to obtain uniform suspension, adding 10 ml sodium tungstate dihydrate aqueous solution (5 g/l) into the above suspension, stirring for 1 hours, transferring obtained homogeneous suspension with stirring into a 100 ml high-pressure hydrothermal reaction vessel lined with polytetrafluoroethylene, allowing to stand at 160 degrees C for 10-15 hours, naturally cooling to room temperature, washing with deionized water and ethanol for many times, centrifuging, drying at 80 degrees C for 8 hours under nitrogen atmosphere, heating at 450-600 degrees C at a rate of 4 degrees C/minutes, calcining for 2-6 hours to obtain tungsten-doped titanium dioxide/graphene composites, and (ii) adding 50-100 mg tungsten-doped titanium dioxide/graphene composite into 500 ml methylene blue aqueous solution having a concentration of 10 mg/l, stirring in the dark for 60 minutes, carrying out photocatalytic degradation experiments under visible light for 120 minutes, adding 5 ml solution for every 30 minutes, centrifuging, subjecting supernatant to absorbance measurement to calculate the degradation effect.