▎ 摘　　要

NOVELTY - A composite photocatalyst comprises 0.5-10.0 %mass reductive graphene oxide and remaining niobium hydroxide. The microstructure of niobium hydroxide nanowire is evenly distributed on the layered reductive graphene oxide. USE - Composite photocatalyst is used for removing phenolic pollutants and reducing hexavalent chromium in wastewater under visible light irradiation (claimed). ADVANTAGE - The composite photocatalyst is prepared by simple and economical method. The high toxic hexavalent chromium is reduced to trivalent chromium using prepared photocatalyst. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of composite photocatalyst.