文献类型：期刊文献

英文题名：Electrochemical surface oxidation of carbon nanofibers

作者：Yoon, Chang-Min[2];Long, Donghui[3,4];Jang, Sang-Min[3];Qiao, Wenming[4];Ling, Licheng[4];Miyawaki, Jin[3];Rhee, Choong-Kyun[1];Mochida, Isao[3];Yoon, Seong-Ho[3]

机构：[1]Chungnam Natl Univ, Dept Chem, Dajeon 305764, South Korea;[2]Penn State Univ, Dept Chem Engn, University Pk, PA 16802 USA;[3]Kyushu Univ, Inst Mat Chem & Engn, Fukuoka 8168580, Japan;[4]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2011

卷号：49

期号：1

起止页码：96

外文期刊名：CARBON

收录：;EI(收录号：20104513366922);WOS:【SCI-EXPANDED(收录号:WOS:000284977500014)】；

基金：The authors thank Suntel Co Ltd for financial support and the G-COE Program of Kyushu University

语种：英文

外文关键词：Fourier transform infrared spectroscopy - Electrodes - Electrolytic reduction - Cyclic voltammetry - X ray photoelectron spectroscopy - Anodic oxidation - Oxygen - Carbon nanofibers - Atoms

摘要：Carbon nanofiber (CNF) surfaces were functionalized with oxygen bearing groups through electrochemical oxidation The electrode was prepared without a binder, allowing easy separation of the functionalized CNFs for subsequent applications The relationships between the applied potential and the CNF structure with the resulting O/C atomic ratio and the distribution of oxygen functional groups were investigated Surface groups were identified and characterized by elemental analyses X-ray photoelectron spectroscopy micro-attenuated total reflectance FTIR, and cyclic voltammetry The oxidation of herringbone CNFs was initiated at a relatively low potential at both the anodic and cathodic electrodes, while the O/C atomic ratio remained relatively constant within the range of potentials investigated The relative concentration of carbonyl and hydroxyl groups increased with increasing potential while the amount of carboxylic groups decreased The structure of the CNF was important in determining the O/C atomic ratio, which was especially dependent on the spatial arrangement of graphene layers Tubular CNFs exhibited low O/C atomic ratios while her ringbone CNFs, which have a higher surface area, exhibited the largest ratios The dispersion of the CNFs in water was much more homogeneous following electrochemical oxidation (C) 2010 Elsevier Ltd All rights reserved