Reactive oxygen species (ROS) can be produced by interactions between sunlight and light-absorbing substances in natural water environments and can completely destroy various organic pollutants in waste water. In this study, we used graphene oxide modified Ag2Se nanoparticles to enhance photochemically generated oxygen (PGO) species activity. Surface area and pore volumes of the Ag2Se-graphene (Ag2Se-G) samples showed catastrophic decrease due to deposition of Ag2Se. The generation of reactive oxygen species was detected through the oxidation reaction of DPCI to DPCO. The photocurrent density and the PGO effect increase in the case of the use of modified graphene. The PGO effect of the graphene modified with Ag2Se composites increased significantly due to a synergetic effect between graphene and the Ag2Se nanoparticles. The photocatalytic activity of sample was evaluated by measuring the degradation of organic pollutants such as methylene blue (MB) and industrial dyes such as Texbrite BA-L (TBA) under visible light.

• Ze-Da Meng(Jiangsu Key Laboratory of Environmental Functional Materials, College of Chemistry and Bioengineering, Suzhou University of Science and Technology, Department of Advanced Materials Science & Engineering, Hanseo University) Corresponding author
• Won-Chun Oh(Department of Advanced Materials Science & Engineering, Hanseo University) Corresponding author