Journal
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
Volume 27, Issue 21, Pages 26810-26816Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-020-09066-8
Keywords
Photocatalysis; Co-catalyst; Defected graphene; Hydrogen evolution; Nitroaromatic reduction
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Funding
- Foundation of Tianjin Educational Committee [2018KJ265]
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Synthesis of highly efficient photocatalysts for energy and environment catalysis is still a big challenge in the materials field. Cadmium sulfide (CdS) is a promising visible light-driven photocatalyst, which can be composited with co-catalysts to increase its photo-activity and stability. In this study, a kind of graphene material with abundant structure defects (D-rGO) is synthesized by a two-step annealing process with nitrogen-doped rGO (N-rGO) as an intermediate. The high-temperature annealing could remove the doped heteroatoms to form structure defects with five or seven carbon atoms. The D-rGO is then used as co-catalyst for the modification of CdS nanoparticles, and enhanced photocatalytic activities could be obtained. A large hydrogen evolution rate of 102.7 mu mol h(-1) g(-1) is achieved, which is also effective for 4-nitrophenol reduction with a rate constant of 0.168 min(-1). The novel CdS/D-rGO composite contains no noble metals and could be used as multi-functional photocatalysts, thus should has great potential in the photocatalysis field.
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