摘要
以氧化石墨和氯铂酸作为初始反应物,采用环境友好型还原剂Vitamin C,绿色还原制备了石墨烯/Pt（GNS/Pt）纳米复合材料。采用X射线衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、傅里叶变换红外（FT-IR）光谱、X射线光电子能谱（XPS）和拉曼光谱（RS）等分析手段对石墨烯/Pt样品进行了表征。结果表明：氧化石墨还原彻底,铂离子和氧化石墨在反应过程中同时被Vitamin C还原,样品的无序度增加,平均晶粒尺寸逐渐减小,Pt粒子的大小和分布受氯铂酸用量的影响,在一定的铂离子浓度下,粒径为7-10 nm的铂纳米粒子均匀分布于石墨烯片层之间,有效地减少了石墨烯片层间的团聚现象。此外,GNS/Pt可稳定分散于水、N,N-二甲基甲酰胺（DMF）、N-甲基吡咯烷酮（NMP）等多种溶剂中,且导电率高达12630 S·m-1。
Graphene/Pt （GNS/Pt） nanocomposites were fabricated via a green and facile method, whichemployed graphene oxide （GO） as a precursor of graphene, HzPtC16 as a precursor of Pt nanoparticles, andVitamin C as an environmentally friendly reducing agent. The as-prepared GNS/Pt was characterized byX-ray diffraction （XRD）, Scanning electron microscopy （SEM）, Transmission electron microscopy （TEM）,Fourier transform infrared spectroscopy （FT-IR）, X-ray photoelectron spectroscopy （XPS） and RamanSpectra （RS）. The results indicate that graphite oxide is completely reduced to graphene, and platinum ionsare reduced by Vitamin C simultaneously. The average grain size of the sample decreases gradually and thedegree of sample disorder increases. The amount of HzPtC16 influences the size range of the Pt nanoparticles,and face-to-face aggregation of graphene sheets is arrested by 7-10 nm Pt crystallites on the graphenesurface under a eertain concentration of platinum ions. In addition, stable suspensions of GNS/Pt can beprepared in some solvents, such as water, N,N-dimethylformamide （DMF） or N-methyl-2-pyrrolidone （NMP）and the electrical conductivity of the GNS/Pt film is up to 12630 S.m-1.
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
2014年第2期258-263,共6页
Journal of Chemical Engineering of Chinese Universities
基金
国家自然科学基金(20976057)
广东省绿色精细化学品工程技术研究中心开放基金资助
