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Li, Yan; Li, Sen; Wang, Yingmin; Wang, Jun; Liu, Hui; Liu, Xinqian; Wang, Lifeng; Liu, Xiaoguang; Xue, Wendong; Ma, Ning
Physical chemistry chemical physics : PCCP, 2017, Letnik: 19, Številka: 18Journal Article
In this work, phosphorus-doped graphene quantum dots (P-GQDs) with a high phosphorus doping content (>7 at%) are synthesized via an electrochemical approach. Sodium phytate (C H Na O P ), a green food antioxidant additive, is used as the electrolyte for providing both a phosphorus source and an electrolysis environment. The obtained P-GQDs exhibit excellent scavenging activity of free radicals, such as hydroxyl radicals (˙OH) and 2,2-diphenyl-1-picrylhydrazyl (DPPH). Combined with Raman, FT-IR, and XPS spectral analyses, the reason for high phosphorus content and the mechanism of free radical scavenging of P-GQDs are investigated in our work.
