▎ 摘　　要

In the present work, photocatalytic degradation of brilliant green has been carried out using graphene oxide/copper oxide (GO/CuO) composite as photocatalyst under visible light. GO/CuO composite has been prepared by hydrothermal method. It has been characterized by XRD, FESEM and FT-IR spectroscopy. The rate of degradation of dye has been monitored spectrophotometrically by measuring absorbance of dye after regular time intervals. The effect of various parameters such as pH, concentration of dye, photocatalyst dosage and light intensity on the rate of reaction has been studied. Various parameters like chemical oxygen demand (COD), conductance, pH, TDS, salinity and dissolved oxygen (DO) for the reaction mixture before and after photocatalytic degradation have been determined. Reusability of the synthesized catalyst has also been assessed.