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The effect of heat treatment on phase transformation, morphology and photoelectrochemical response of short TiO2 nanotubes.

TiO2 nanotubes (TNT) have attracted considerable attention due to large specific surface area in a small geoetrical area and fewer interfacial grain boundaries. However, thermal stability and crystalline phase of TNT greatly affects their potential applications in the areas of photocatalysis, optoel...

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Main Authors: Lim, Ying Chin, Zainal, Zulkarnain, Hussein, Mohd. Zobir, Tan, Wee Tee
Format: Article
Language:English
English
Published: National Institute R and D of Materials Physics 2013
Online Access:http://psasir.upm.edu.my/id/eprint/30006/1/The%20effect%20of%20heat%20treatment%20on%20phase%20transformation.pdf
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spelling oai:psasir.upm.edu.my:30006 http://psasir.upm.edu.my/id/eprint/30006/ The effect of heat treatment on phase transformation, morphology and photoelectrochemical response of short TiO2 nanotubes. Lim, Ying Chin Zainal, Zulkarnain Hussein, Mohd. Zobir Tan, Wee Tee TiO2 nanotubes (TNT) have attracted considerable attention due to large specific surface area in a small geoetrical area and fewer interfacial grain boundaries. However, thermal stability and crystalline phase of TNT greatly affects their potential applications in the areas of photocatalysis, optoelectronics and gas sensing. Thus, thermal stability and phase transition of highly ordered TNT via calcination from 200-800 oC were studied in open air atmosphere. The results indicated that the as-anodized TNT is amorphous and transformed to anatase phase at 300 oC. Crystallization of anatase phase increases on elevating calcination temperature and rutile phase co-existed at 500 oC. No discernable changes in the nanotubes dimensions were found and TNT is thermally stable up to temperature lower than 600 oC, above which significant sintering of TNT occurred. At 800 oC, grain growth and oxidation of Ti resulted in completely collapsed of TNT to dense rutile crystallites. Photoelectrochemical response of calcined TNT enhanced substantially with respect to that of as-anodized samples and gradually increased with elevating temperature up to 500 oC after which they decreased, which was probably ascribed to changes in phase structural and morphological properties of TNT. National Institute R and D of Materials Physics 2013-01 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/30006/1/The%20effect%20of%20heat%20treatment%20on%20phase%20transformation.pdf Lim, Ying Chin and Zainal, Zulkarnain and Hussein, Mohd. Zobir and Tan, Wee Tee (2013) The effect of heat treatment on phase transformation, morphology and photoelectrochemical response of short TiO2 nanotubes. Digest Journal of Nanomaterials and Biostructures, 8 (1). pp. 167-176. ISSN 1842-3582 http://www.chalcogen.ro/digest.html English
institution UPM IR
collection UPM IR
language English
English
description TiO2 nanotubes (TNT) have attracted considerable attention due to large specific surface area in a small geoetrical area and fewer interfacial grain boundaries. However, thermal stability and crystalline phase of TNT greatly affects their potential applications in the areas of photocatalysis, optoelectronics and gas sensing. Thus, thermal stability and phase transition of highly ordered TNT via calcination from 200-800 oC were studied in open air atmosphere. The results indicated that the as-anodized TNT is amorphous and transformed to anatase phase at 300 oC. Crystallization of anatase phase increases on elevating calcination temperature and rutile phase co-existed at 500 oC. No discernable changes in the nanotubes dimensions were found and TNT is thermally stable up to temperature lower than 600 oC, above which significant sintering of TNT occurred. At 800 oC, grain growth and oxidation of Ti resulted in completely collapsed of TNT to dense rutile crystallites. Photoelectrochemical response of calcined TNT enhanced substantially with respect to that of as-anodized samples and gradually increased with elevating temperature up to 500 oC after which they decreased, which was probably ascribed to changes in phase structural and morphological properties of TNT.
format Article
author Lim, Ying Chin
Zainal, Zulkarnain
Hussein, Mohd. Zobir
Tan, Wee Tee
spellingShingle Lim, Ying Chin
Zainal, Zulkarnain
Hussein, Mohd. Zobir
Tan, Wee Tee
The effect of heat treatment on phase transformation, morphology and photoelectrochemical response of short TiO2 nanotubes.
author_facet Lim, Ying Chin
Zainal, Zulkarnain
Hussein, Mohd. Zobir
Tan, Wee Tee
author_sort Lim, Ying Chin
title The effect of heat treatment on phase transformation, morphology and photoelectrochemical response of short TiO2 nanotubes.
title_short The effect of heat treatment on phase transformation, morphology and photoelectrochemical response of short TiO2 nanotubes.
title_full The effect of heat treatment on phase transformation, morphology and photoelectrochemical response of short TiO2 nanotubes.
title_fullStr The effect of heat treatment on phase transformation, morphology and photoelectrochemical response of short TiO2 nanotubes.
title_full_unstemmed The effect of heat treatment on phase transformation, morphology and photoelectrochemical response of short TiO2 nanotubes.
title_sort effect of heat treatment on phase transformation, morphology and photoelectrochemical response of short tio2 nanotubes.
publisher National Institute R and D of Materials Physics
publishDate 2013
url http://psasir.upm.edu.my/id/eprint/30006/1/The%20effect%20of%20heat%20treatment%20on%20phase%20transformation.pdf
_version_ 1819295281158553600
score 13.4562235

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