Masters Theses
Abstract
"A range of methods for oxidation of CNT surfaces have been developed with varying success. A new sonochemical treatment method has recently been developed by Xing et al. [J. Phys. Chem. B 2004,108,19255] which yields a homogeneous, high-density oxidized CNT surface. X-ray photoelectron spectroscopy (XPS), Attenuated Total Reflection-Fourier Transform Infrared Spectroscopy (ATR-IR), Raman spectroscopy, transmission electron microscopy (TEM), cyclic voltammetry and settling speed measurements were used to characterize the oxidized surfaces at interval times of sonochemical treatment. Contained in this thesis are details and results of the XPS, Raman and ATR-IR spectroscopy investigations.
The XPS results showed that the CNT were populated with -C-O-/-C=O and -COO- groups along with weakly bound CO at longer treatment times. The integrated XPS C Is core level peak area ratios of the oxidized-to-graphitic C oxidation states, as well as the atom % oxygen from the O Is level, showed an increase in CNT oxidation (attributed to -COx) with increased sonication times from 1 to 8 h. The increase in C surface oxidation correlated well with the measured atom % oxygen. Most of the CNT surface oxidation occurred between 1 and 2 h.
ATR-IR and Raman spectroscopy studies supported the XPS results. Furthermore, it was additionally found that deposited Pt nanoparticles were attached to -C-O- and -C=0 binding sites, with the two hour treated CNTs becoming more evenly Pt loaded with respect to agglomeration and size variation"--Abstract, page iv.
Advisor(s)
Chusuei, Charles C.
Committee Member(s)
Woelk, Klaus
Xing, Yangchuan
Department(s)
Chemistry
Degree Name
M.S. in Chemistry
Sponsor(s)
Petroleum Research Fund
Foundation for Chemical Research
Missouri Research Board
Publisher
University of Missouri--Rolla
Publication Date
Spring 2006
Pagination
x, 59 pages
Note about bibliography
Includes bibliographical references (pages 53-58).
Rights
© 2006 Robert Victor Hull, All rights reserved.
Document Type
Thesis - Restricted Access
File Type
text
Language
English
Subject Headings
Carbon
Electron spectroscopy
Fourier transform infrared spectroscopy
Nanostructured materials
Raman spectroscopy
Tubes
Thesis Number
T 8953
Print OCLC #
82369324
Link to Catalog Record
Electronic access to the full-text of this document is restricted to Missouri S&T users. Otherwise, request this publication directly from Missouri S&T Library or contact your local library.
http://merlin.lib.umsystem.edu/record=b5771812~S5Recommended Citation
Hull, Robert V., "X-ray photoelectron, Raman and attenuated total reflection-infrared spectroscopy studies of sonochemically oxidized multiwalled carbon nanotubes" (2006). Masters Theses. 3857.
https://scholarsmine.mst.edu/masters_theses/3857
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Comments
Funding provided by the University of Missouri Research Board (1149), the American Chemical Society, the Petroleum Research Fund (39542-G2) and the Foundation for Chemical Research, Inc. is very much appreciated.