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 Bi 2 S 3 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)/Bi 2 S 3 heterostructures. The study results have shown that the H 2 production efficiency of 2% GQD(4)/Bi 2 S 3 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 Bi 2 S 3 . The H 2 O 2 production and tetracycline (TC) degradation efficiency of 2% GQD(4)/Bi 2 S 3 are the best, while the methylene blue (MB) degradation efficiency of 1% GQD(4)/Bi 2 S 3 is relatively better. The research results show that as a perfect combination of GQD(4)/Bi 2 S 3 heterostructures, it offers a productive plan for eliminating organic pollutants in water and producing clean oxidant and hydrogen energy.