Graphene quantum dot @ Flower-like Bi2S3 composites for photodegradation of organic pollutants combined photosynthesis of H2 and H2O2 from treated water

In this work, flower-like Bi2S3 was prepared by hydrothermal method using different solvents, and materials with better performance were selected. Graphene quantum dots (GQD, which is rich in specific amino groups) was prepared by aqueous phase fusion technology. Ultimately, a straightforward one-step hydrothermal process was used to successfully manufacture composite materials in order to build GQD(4)/Bi2S3 heterostructures. The study results have shown that the H2 production efficiency of 2% GQD(4)/Bi2S3 is the best, and its photocatalytic hydrogen production efficiency within 3 h is 5.92 times that of GQD(4) and 3.03 times that of Bi2S3. The H2O2 production and tetracycline (TC) degradation efficiency of 2% GQD(4)/Bi2S3 are the best, while the methylene blue (MB) degradation efficiency of 1% GQD(4)/Bi2S3 is relatively better. The research results show that as a perfect combination of GQD(4)/Bi2S3 heterostructures, it offers a productive plan for eliminating organic pollutants in water and producing clean oxidant and hydrogen energy.