▎ 摘　　要

NOVELTY - A nitrogen-modified graphene-supported copper oxide composite material comprises spindle-shaped and/or irregular block-shaped copper oxide which is uniformly loaded on the surface of nitrogen-modified graphene. The spindle-shaped or irregular block-shaped copper oxide is composed of assembled copper oxide nanosheets. USE - The nitrogen-modified graphene-supported copper oxide composite material is used for catalytically activate persulfate oxidation to remove organic matter in high-salt organic wastewater (claimed). ADVANTAGE - The composite material has double catalytic activation effect to the persulfate, greatly improves the catalytic activated persulfate oxidation organic matter degradation efficiency, and has high oxidation degradation efficiency, fast speed, simple process, convenient operation, and low waste water treatment cost. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparation of the composite material comprising mixing graphene oxide and the nitrogen source in a liquid phase to form a dispersion, adjusting the pH of the dispersion to alkaline, hydrothermal reacting to obtain a nitrogen-modified graphene gel, mixing the nitrogen-modified graphene gel with a copper salt, and hydrothermal reacting.