▎ 摘　　要

Herein, we report the synthesis of RGO-beta-Bi2O3 nanocomposite for visible light driven efficient photocatalytic removal of wastewater pollutant. Improved oxidation of pristine graphite (PG) to graphene oxide (GO) was obtained by involving additional oxiding agent Na2S2O8 in Hummer's method. The as-synthesized reduced graphene oxide (RGO) was decorated with beta-bismuth oxide to develop RGO-beta-Bi2O3 nanocomposite via in-situ we processing method. The as-prepared nanocomposites were characterized by range of techniques. The photocatalytic activity of as-prepared RGO-beta-Bi2O3 nanocomposite was investigated for the degradation of commercially available dye Direct Yellow-27 (DY-27), which is extensively used in the textile industries. The as-syntesized RGO-beta-Bi2O3 nanocomposite's photocatalysis shows first order kinetic. Furthermore, effect of dye concentration, pH, catalyst loading and temperature were studied to optimize the photocatalytic performance. The enhanced photocatalytic efficiency of nanocomposite could be attributed to the greater surface area and reduction in recombination of excited electron and holes.