Investigation on optical and photoelectrochemical properties of self-assembled titania nanotube arrays prepared by anodization
Well ordered and vertically oriented titania nanotubes (TNT) are of great scientific interest due to their high surface area, fewer interfacial grain boundaries and excellent charge transfer between interfaces; all are critical properties in photoelectrochemical and photocatalysis application. In th...
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| Format: | Article |
| Language: | English |
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Malaysian Analytical Sciences Society
2016
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| Online Access: | http://psasir.upm.edu.my/id/eprint/27949/ http://psasir.upm.edu.my/id/eprint/27949/1/Investigation%20on%20optical%20and%20photoelectrochemical%20properties%20of%20self-assembled%20titania%20nanotube%20arrays%20prepared%20by%20anodization.pdf |
| _version_ | 1848845980428926976 |
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| author | Lim, Ying Chin Zainal, Zulkarnain Hussein, Mohd Zobir Tan, Wee Tee |
| author_facet | Lim, Ying Chin Zainal, Zulkarnain Hussein, Mohd Zobir Tan, Wee Tee |
| author_sort | Lim, Ying Chin |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Well ordered and vertically oriented titania nanotubes (TNT) are of great scientific interest due to their high surface area, fewer interfacial grain boundaries and excellent charge transfer between interfaces; all are critical properties in photoelectrochemical and photocatalysis application. In this study, self-assembled TNT electrodes were synthesized by anodization of pure Ti in 0.5 wt.% NH4F solution (NH4F/H2O), in mixture of aqueous-organic solution (NH4F/H2O/EG) and in an organic solution (NH4F/EG). Choice of electrolytic medium has an influence on the crystalline structure, regularity, elemental composition and band gap of TNT. All the samples showed a red shift and stronger absorption in the wavelength between 500-700 nm ascribed to the surface colour and increase crystallinity upon calcination. TNT formed in NH4F/H2O solution has the highest direct band gap of 3.34 eV due to quantization effect. From Liner Sweep Photovoltammetry analysis, the lowest photocurrent was recorded for TNT anodized in NH4F/H2O and a twofold and fivefold increase on the magnitude of photocurrent was obtained for those formed in NH4F/H2O/EG and NH4F/EG solution, respectively. Hence, highest photoefficiency of 2.79 % was recorded for TNT formed in NH4F/EG probably due to the formation of longer length tube. |
| first_indexed | 2025-11-15T08:55:26Z |
| format | Article |
| id | upm-27949 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T08:55:26Z |
| publishDate | 2016 |
| publisher | Malaysian Analytical Sciences Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-279492016-06-20T05:41:41Z http://psasir.upm.edu.my/id/eprint/27949/ Investigation on optical and photoelectrochemical properties of self-assembled titania nanotube arrays prepared by anodization Lim, Ying Chin Zainal, Zulkarnain Hussein, Mohd Zobir Tan, Wee Tee Well ordered and vertically oriented titania nanotubes (TNT) are of great scientific interest due to their high surface area, fewer interfacial grain boundaries and excellent charge transfer between interfaces; all are critical properties in photoelectrochemical and photocatalysis application. In this study, self-assembled TNT electrodes were synthesized by anodization of pure Ti in 0.5 wt.% NH4F solution (NH4F/H2O), in mixture of aqueous-organic solution (NH4F/H2O/EG) and in an organic solution (NH4F/EG). Choice of electrolytic medium has an influence on the crystalline structure, regularity, elemental composition and band gap of TNT. All the samples showed a red shift and stronger absorption in the wavelength between 500-700 nm ascribed to the surface colour and increase crystallinity upon calcination. TNT formed in NH4F/H2O solution has the highest direct band gap of 3.34 eV due to quantization effect. From Liner Sweep Photovoltammetry analysis, the lowest photocurrent was recorded for TNT anodized in NH4F/H2O and a twofold and fivefold increase on the magnitude of photocurrent was obtained for those formed in NH4F/H2O/EG and NH4F/EG solution, respectively. Hence, highest photoefficiency of 2.79 % was recorded for TNT formed in NH4F/EG probably due to the formation of longer length tube. Malaysian Analytical Sciences Society 2016 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/27949/1/Investigation%20on%20optical%20and%20photoelectrochemical%20properties%20of%20self-assembled%20titania%20nanotube%20arrays%20prepared%20by%20anodization.pdf Lim, Ying Chin and Zainal, Zulkarnain and Hussein, Mohd Zobir and Tan, Wee Tee (2016) Investigation on optical and photoelectrochemical properties of self-assembled titania nanotube arrays prepared by anodization. Malaysian Journal of Analytical Sciences, 20 (1). pp. 121-130. ISSN 1394-2506 http://www.ukm.my/mjas/new_mjas/ |
| spellingShingle | Lim, Ying Chin Zainal, Zulkarnain Hussein, Mohd Zobir Tan, Wee Tee Investigation on optical and photoelectrochemical properties of self-assembled titania nanotube arrays prepared by anodization |
| title | Investigation on optical and photoelectrochemical properties of self-assembled titania nanotube arrays prepared by anodization |
| title_full | Investigation on optical and photoelectrochemical properties of self-assembled titania nanotube arrays prepared by anodization |
| title_fullStr | Investigation on optical and photoelectrochemical properties of self-assembled titania nanotube arrays prepared by anodization |
| title_full_unstemmed | Investigation on optical and photoelectrochemical properties of self-assembled titania nanotube arrays prepared by anodization |
| title_short | Investigation on optical and photoelectrochemical properties of self-assembled titania nanotube arrays prepared by anodization |
| title_sort | investigation on optical and photoelectrochemical properties of self-assembled titania nanotube arrays prepared by anodization |
| url | http://psasir.upm.edu.my/id/eprint/27949/ http://psasir.upm.edu.my/id/eprint/27949/ http://psasir.upm.edu.my/id/eprint/27949/1/Investigation%20on%20optical%20and%20photoelectrochemical%20properties%20of%20self-assembled%20titania%20nanotube%20arrays%20prepared%20by%20anodization.pdf |