Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 19, Issue 18, Pages 11631-11638Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6cp06377b
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Funding
- National Natural Science Foundation of China [21674011, 21374009, 51202011]
- Beijing Natural Science Foundation [2172040]
- Beijing Organization Department Outstanding Talented Person Project [2013D009006000001]
- Fundamental Research Funds for the Central Universities [FRF-TP-15-005A3]
- China Scholarship Council (CSC)
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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 (C6H6Na12O24P6), 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)-O-center dot) 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.
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