Effects of sodium oleate on synthesis and photocatalytic activity of Bi_2WO_6/Bi_2O_3@RGO

摘要

In this study, the effects of sodium oleate on synthesis of Bi_2WO_6/Bi_2O_3 loaded reduced graphene oxide photocatalyst was studied. The as-prepared composites were characterized by X-ray diffraction, Fourier transform infrared, X-ray photoelectron spectroscopy, UV-visible diffuse reflectance and photoluminescence spectroscopy. The results suggested that addition of sodium oleate not only promoted synthesis of Bi_2O_3, but also enhanced the reduction of GO to graphene. When the amount of sodium oleate was 4 mol (Bi:SO= 1:1), Bi_2WO_6/Bi_2O_3@RGO to the best visible-light photocatalytic activity can be synthesized by a facile one-step solvothermal process without further reduction reaction. Hence, it indicated that sodium oleate could affect the synthesis of the as-prepared composites and the photocatalytic activity for degradation of RhB. This study did provide not only a facile method to synthesize Bi_2WO_6/ Bi_2O_3@RGO, but also a method to reduce graphene oxide to graphene.