文献类型：期刊文献

英文题名：Characterization of surface oxygen complexes on carbon nanofibers by TPD, XPS and FT-IR

作者：Zhou, Jing-Hong[1]; Sui, Zhi-Jun[1]; Zhu, Jun[1]; Li, Ping[1]; Chen, De[2]; Dai, Ying-Chun[1]; Yuan, Wei-Kang[1]

机构：[1]E China Univ Sci & Technol, UNILAB, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Norwegian Univ Sci & Technol, Dept Chem Engn, N-7491 Trondheim, Norway

年份：2007

卷号：45

期号：4

起止页码：785

外文期刊名：CARBON

收录：;EI(收录号：20070510398944);WOS:【SCI-EXPANDED(收录号:WOS:000245310100014)】；

语种：英文

外文关键词：Complexation - Fourier transform infrared spectroscopy - Oxidation - Oxygen - Surface properties - Temperature programmed desorption - X ray photoelectron spectroscopy

摘要：A fishbone type carbon nanofiber (CNF) is functionalized by different chemical and thermal treatments, and characterized by TPD, FT-IR and XPS. TPD is proved to be an effective technique to characterize surface oxygen complexes on carbon nanofibers, a novel type of mesoporous and highly graphitic carbon material. TPD spectra are analyzed by a modified deconvolution method with a multiple Gaussian function, allowing for more precise determination of each of the oxygen complexes on the surface than those reported in the literature. The surface properties of these modified CNFs measured by FT-IR and XPS are in good agreement with the TPD results. All the CNF surfaces possess more CO-producing oxygen complexes than CO2-producing ones. Different functionalization methods result in different types and distributions of oxygen complexes on the CNF surface. The. gas phase oxidation of the CNF mainly increases the number and concentration of carbonyl groups, while the oxidation in the liquid phase increases those of both carboxyl and anhydride groups. Moreover, thermal annealing of CNF in an inert gas at 1700 C strongly decreases the amount of surface oxygen complexes though CNF subsequently undergoes gas oxidation. (c) 2006 Elsevier Ltd. All rights reserved.