▎ 摘　　要

NOVELTY - Sulfur-doped graphene foam comprises 15-40 %mass elemental sulfur, and carbon atoms and oxygen atoms (remainder) that combine to form carbon-carbon bond and carbon-oxygen bond, where mass ratio of the carbon atom and oxygen atom is 100:80-100:15, and the foam is sponge-like. USE - The sulfur-doped graphene foam is useful in sewage treatment that contains heavy metal salt, dye, antibiotic and pesticide (all claimed). ADVANTAGE - The preparation method of the sulfur-doped graphene foam and sewage treatment method is simple and convenient to operate, cost-effective, and rapid. The graphene foam is uniformly doped with sulfur and has efficient adsorption efficacy with respect to sewage. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) method for preparing the above-mentioned sulfur-doped graphene foam, involves (a) subjecting suitable amount of graphite powder to pre-oxidation and processing obtained pre-oxidized graphite powder to obtain graphene oxide, and (b) subjecting the graphene oxide to reduction reaction in presence of sulfur dopant such that the graphene oxide gets self-assembled into foam structure by undergoing hydrothermal reaction; and (2) use of the above-mentioned sulfur-doped graphene foam for sewage treatment, involves mixing suitable amount of the sulfur-doped grapheme foam with sewage to obtain liquid dispersion, placing the dispersion in thermostatic shaker, allowing adsorption to occur, filtering out the sulfur-doped graphene foam using filter material, washing the sulfur-doped graphene foam using detergent, and recycling and reusing washed sulfur-doped graphene foam.