▎ 摘　　要

NOVELTY - Synthesizing ternary composite visible light catalyst comprises preparing graphitic carbon nitride by calcining melamine method, preparing polyaniline/graphitic carbon nitride binary compound, mixing graphitic carbon nitride with n,n-dimethylformamide solution of polyaniline, stirring and dispersing uniformly, evaporating the solvent N,N-dimethylformamide to obtain polyaniline/ graphitic carbon nitridebinary composite, mixing with monolayer graphene oxide and ascorbic acid in deionized water, subjecting the mixture to hydrothermal treatment to prepare graphene/g graphitic carbon/polyaniline ternary composite as final product. USE - The catalyst is useful for treating hexavalent chromium waste water (claimed). ADVANTAGE - The method is simple and easy to implement, rich in raw materials, has no metals and metal compounds, and is low cost. The catalyst has reduced hexavalent chromium in decorative chromium plating baths, high visible light catalytic activity, excellent photocatalytic stability and reusable performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for ternary composite visible light catalyst obtained by above method.