文献类型：期刊文献

英文题名：Synthesis of thin-walled carbon nanocages and their application as a new kind of nanocontainer

作者：Teng, Shang Jun[2];Wang, Jian Nong[1];Wang, Xiao Xia[3]

机构：[1]E China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China;[2]Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai Key Lab Laser Proc & Mat Modificat, Shanghai 200240, Peoples R China;[3]Tongji Univ, Sch Mat Sci & Engn, Shanghai 200092, Peoples R China

年份：2011

卷号：21

期号：14

起止页码：5443

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY

收录：;EI(收录号：20111613927651);WOS:【SCI-EXPANDED(收录号:WOS:000288659500036)】；

基金：J. N. Wang is thankful to the research fund (project # 50871067) from The National Natural Science Foundation of China and the fund for the national 863 projects of 2007AA05Z128 and 2009AA034400 from The Ministry of Science and Technology of China.

语种：英文

外文关键词：Chlorination - Carbon - Nanotubes - Pyridine - Filtration - Heat treatment - Temperature - Iron compounds - Chlorine compounds

摘要：Carbon nanocages (CNCs) with a hollow core and a thin wall of a few graphitic layers have a wide range of applications. However, the preparation of such a material remains a great challenge. In this study, we report the preparation of thin-walled CNCs through the pyrolysis of a mixture composed of pyridine and liquid iron pentacarbonyl, subsequent heat treatment in the presence of NH4Cl at a low temperature, and finally washing and filtering in water. The finding that pyridine is completely mutually soluble with liquid iron pentacarbonyl in any proportion stands out to be a crucial advantage for reducing the thickness of the graphitic wall formed on a metal core. To obtain hollow CNCs, heat-treatment proves to be simple and effective in removing the metal core and, more importantly, maintaining the thin graphitic wall when compared with conventional boiling in a strong oxidant, such as HNO3. The thin-walled hollow CNCs are demonstrated to be suitable nanocontainers for encapsulating iodine, as iodine can easily get into and out of the CNCs when it is heated at a relatively low temperature. Considering the large internal space and thin graphitic wall, the hollow CNCs could be widely used in many fields, such as biology, medicine and chemistry.