作者：Tian, R;Yu, ZY;Xiang, D;Cheng, J;Wang, XB;You, HJ;Liu, FM;Li, MJ;Wan, L;Li, SQ;Li, Q;Xu, Y;

作者单位：Hubei Univ, Fac Mat Sci & Engn, Wuhan 430062, Peoples R China.;Hubei Univ, Fac Mat Sci & Engn, Wuhan 430062, Peoples R China.;Hubei Univ, Fac Mat Sci & Engn, Wuhan 430062, Peoples R China.;Cent China Normal Univ, Coll Chem, Key Lab Pesticide & Chem Biol E

刊名：Chemical vapor deposition

ISSN：0948-1907

出版年：2009-01-05

卷：15

期：40911

起页：53

止页：56

分类号：TQ175

语种：英文

关键词：Few-layered graphene;Nanostructures;

内容简介

Large-scale, substrate-free graphene, with few-layered sheets, is synthesized by the CVD of methane over cobalt supported on magnesium oxides at 1000 degrees C in a gas flow of argon. Typically, 50 mg of the few-layered graphene materials over 500 mg of the Co/MgO catalysts are synthesized under our experimental conditions. Randomly aggregated, thin, crumpled graphene sheets stacked closely together are produced. Both carbon (94.6 at.-%) and oxygen (5.4 at.-%) are present in the graphene sheets. The oxygen may originate from air adsorbed on the graphene sheets. Our results indicate the presence of localized sp(3) defects within the sp(2) carbon network and small sp(2) domains in the few-layered graphene particles.