A comparison study of catalytic oxidation and acid oxidation to prepare carbon nanotubes for filling with Ru nanoparticles

Wang, Li and Ge, Lei and Rufford, Thomas E. and Chen, Jiuling and Zhou, Wei and Zhu, Zhonghua and Rudolph, Victor (2011) A comparison study of catalytic oxidation and acid oxidation to prepare carbon nanotubes for filling with Ru nanoparticles. Carbon, 49 (6). pp. 2022-2032. ISSN 0008-6223

Abstract

Ru catalyst confined within the channels of multiwall carbon nanotubes (MWCNTs) is prepared by opening tube ends via mixed concentrated acid oxidation or catalytic oxidation, followed by filling via wet impregnation. The catalyst filling ratio is characterized by X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM). The defects and functional groups are detected and quantified by Raman, fourier transformer infrared spectroscopy (FTIR) and XPS. The results show that high catalyst filling efficiency (∼80%) can be achieved with catalytic oxidation pre-treatment. The acid oxidation process can introduce more oxygen-containing functional groups such carboxyl and phenol groups. Both FTIR and XPS provide evidence for functional groups removal during thermal treatment. The effects of the nanotube length distributions, defects and functional groups on filling efficiency have been discussed intensively.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty / Department / School: No Faculty
Date Deposited: 26 May 2017 03:24
Last Modified: 30 May 2017 05:21
Uncontrolled Keywords: comparison study; filling ratio; fourier; FTIR; multi-wall carbon nanotubes; nanotube lengths; oxidation pre-treatment; oxidation process; phenol groups; Ru catalysts; Ru nanoparticles; TEM; thermal treatment; tube ends; wet impregnation; XPS; carbon nanotubes; catalysts; defects; filling; functional groups; infrared spectroscopy; multiwalled carbon nanotubes (MWCN); oxygen; phenols; transmission electron microscopy; x-ray photoelectron spectroscopy; catalytic oxidation
Fields of Research : 09 Engineering > 0904 Chemical Engineering > 090402 Catalytic Process Engineering
Identification Number or DOI: 10.1016/j.carbon.2011.01.028
URI: http://eprints.usq.edu.au/id/eprint/31154

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