Li Yan, Li Sen, Wang Yingmin, Wang Jun, Liu Hui, Liu Xinqian, Wang Lifeng, Liu Xiaoguang, Xue Wendong, Ma Ning
University of Science and Technology Beijing, Beijing 100083, China.
Phys Chem Chem Phys. 2017 May 10;19(18):11631-11638. doi: 10.1039/c6cp06377b.
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 (CHNaOP), 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.
在本工作中，通过电化学方法合成了具有高磷掺杂含量（>7 at%）的磷掺杂石墨烯量子点（P-GQDs）。植酸钠（CHNaOP），一种绿色食品抗氧化剂添加剂，用作电解质以提供磷源和电解环境。所获得的P-GQDs表现出优异的清除自由基活性，如羟基自由基（˙OH）和2,2-二苯基-1-苦基肼（DPPH）。结合拉曼光谱、傅里叶变换红外光谱和X射线光电子能谱分析，本工作研究了P-GQDs高磷含量的原因及其清除自由基的机制。
