ZnWO
4/graphene hybride (GZW-X) photocatalysts were synthesized via a facile in situ reduction of graphene oxide and ZnWO
4 in water. High efficiency for the degradation of methylene blue (MB) under both UV light and visible light was obtained for the GZW-X photocatalysts. The photocatalytic efficiency of ZnWO
4/graphene-0.2 wt % under visible-light and UV-light irradiation was 7.1 and 2.3 times that of pristine ZnWO
4, respectively. The visible photocatalytic activity originated from the
鈥?/sup>OH and O2鈥⑩€?/sup>, which were formed by photosensitization of graphene in ZnWO4/graphene. The enhancement of UV photocatalytic light activity in ZnWO4/graphene was attributed to the high separation efficiency of photoinduced electron鈥揾ole pairs resulting from the promotion of HOMO orbit of graphene in ZnWO4/graphene.
Keywords:
photocatalysis; ZnWO4; graphene; hybridization