电位质子滴定与NEXAFS和XPS表征功能化多壁碳纳米管比较(英文)  

Comparing characterization of functionalized multi-walled carbon nanotubes by potentiometric proton titration,NEXAFS,and XPS

作　　者：Zhiteng Zhang Lisa Pfefferle Gary L.Haller 

机构地区：[1]Department of Chemical and Environmental Engineering, School of Engineering and Applied Science, Yale University New Haven, CT 06520-8286, USA

出　　处：《催化学报》2014年第6期856-863,共8页

基　　金：the DOE, Office of Basic Energy Sciences, grant DE-FG02-01ER15183 for financial support

摘　　要：Since the discovery of carbon nanotubes (CNT), this material has been recognized as an attractive catalyst support. CNT must be functionalized before use as a catalyst support and typically this involves oxidation. However, the functional group distribution on the CNT is very complex mixture of groups and varies with oxidation agent used. Here a simple acid-base titration is introduced to characterize the oxygen functionalized CNT. By comparing characterization with near-edge X-ray absorption fine structure (NEXAFS) and X-ray photoelectron spectroscopy (XPS) for both at the C and O K-edges, it can be demonstrated that potentiometric proton titration can be a fast and quantitative analysis for Brnsted acid functional groups on CNT.Since the discovery of carbon nanotubes （CNT）, this material has been recognized as an attractive catalyst support. CNT must be functionalized before use as a catalyst support and typically this involves oxidation. However, the functional group distribution on the CNT is very complex mixture of groups and varies with oxidation agent used. Here a simple acid-base titration is introduced to characterize the oxygen functionalized CNT. By comparing characterization with near-edge X-ray absorption fine structure （NEXAFS） and X-ray photoelectron spectroscopy （XPS） for both at the C and O K-edges, it can be demonstrated that potentiometric proton titration can be a fast and quan-titative analysis for Br？nsted acid functional groups on CNT.

关 键 词：多壁碳纳米管 NEXAFS 电位滴定 官能化 XPS 表征 近边X射线吸收精细结构 质子 

分 类 号：O613.71[理学—无机化学]