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Structural characterization and effect of dehydration on the Ni-doped titanate nanotubes

Title
Structural characterization and effect of dehydration on the Ni-doped titanate nanotubes
Authors
Kim, DHJang, JSGoo, NHKwon, MSLee, JWChoi, SHShin, DWKim, SJLee, KSnull
Date Issued
2009-08
Publisher
ELSEVIER SCIENCE BV
Abstract
Titanate nanotubes and Ni-doped titanate nanotubes were synthesized by hydrothermal method and simple firing using rutile powders as starting materials. The hydrogen absorption of the nanotubes was investigated by the conventional volumetric pressure-composition (P-C) isothermal method using an automated Sivert's type apparatus. The microstructure and morphology of the synthesized nanotubes were characterized by X-ray diffraction (XRD), high resolution transmission electron microscopy (HR-TEM). Titanate nanotubes compose of H2Ti2O5 center dot H2O in accordance with DFT (Density Functional Theory) calculation and has outer and inner diameter of similar to 10 and 6 nm, and the interlayer spacing about 0.65-0.74 nm. The storage capacity of hydrogen in the Ni-doped nanotubes increased linearly with pressure and revealed reliable evidence of hydrogen sorption at room temperatures. (C) 2009 Elsevier B.V. All rights reserved.
Keywords
Titanate nanotubes; Hydrothermal method; Hydrogen storage; XFAS; Ni dopant; LITHIUM INTERCALATION; ANNEALING TEMPERATURE; TIO2 NANOTUBES; HYDROGEN; STORAGE; NANOWIRES; CAPACITY; NANORODS
URI
https://oasis.postech.ac.kr/handle/2014.oak/27863
DOI
10.1016/J.CATTOD.200
ISSN
0920-5861
Article Type
PROCEEDINGS PAPER
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