摘要
采用Hummers法合成氧化石墨并在水中超声分散获得氧化石墨烯水溶胶,通过真空辅助自组装法使氧化石墨烯片定向流动组装制得氧化石墨烯薄膜。进一步对氧化石墨烯薄膜进行真空低温热处理,并以傅立叶变换红外光谱仪、X射线衍射仪、拉曼光谱仪、扫描电子显微镜、透射电子显微镜等进行表征分析。结果表明:低温热处理使氧化石墨烯薄膜具有导电性,且其导电率可达到527S/m,并有利于进一步炭化。该法简单易行,避免了水合肼等有毒且污染环境的化学试剂的使用,有益于氧化石墨烯薄膜的批量制备。
Graphite oxide was synthesized by the Hummers and Offemann method,followed by ultrasonic delamination in water to produce a stable hydrosol of graphene oxide sheets.The graphene oxide films were prepared from the hydrosol by a vacuum-assisted self-assembly technique.These films were further treated in a vacuum oven at different temperatures,and characterized by Fourier transform infrared spectroscopy,X-ray diffraction,Raman spectroscopy,and scanning and transmission electron microscopy.Results indicate that the graphene oxide films exhibit good electrical conductivity up to 527 S/m after the thermal treatment at temperatures from 130 to 200 ℃.This environmentally friendly and easy approach is promising for the large scale preparation of graphene oxide films with no need of hydrazine and other toxic chemicals.
出处
《新型炭材料》
SCIE
EI
CAS
CSCD
北大核心
2011年第1期41-45,共5页
New Carbon Materials
关键词
氧化石墨烯
石墨烯
薄膜
低温热处理
Graphene oxide
Graphene
Film
Thermal treatment at low temperature
