Preparation and characterization of nanostructured TiO2 via electrochemical anodization in aqueous ammonium fluoride
Electrochemical anodization of titanium (Ti) in acidic fluorinated electrolyte has emerged as a simple and straightforward method to synthesize TiO2 coating on Ti substrates directly. In this study, attempt was made to perform the anodic oxidation of Ti foil in a standard two-electrode bath containi...
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| Format: | Article |
| Language: | English |
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Institut Kimia Malaysia
2009
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| Online Access: | http://psasir.upm.edu.my/id/eprint/16304/ http://psasir.upm.edu.my/id/eprint/16304/1/Preparation%20and%20characterization%20of%20nanostructured%20TiO2%20via%20electrochemical%20anodization%20in%20aqueous%20ammonium%20fluoride.pdf |
| _version_ | 1848842923815206912 |
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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 | Electrochemical anodization of titanium (Ti) in acidic fluorinated electrolyte has emerged as a simple and straightforward method to synthesize TiO2 coating on Ti substrates directly. In this study, attempt was made to perform the anodic oxidation of Ti foil in a standard two-electrode bath containing relatively mild electrolyte, NH4F at various potentials for 1 hour. The resulting TiO2 films were characterized with X-ray Diffraction (XRD), Field Emission Scanning Electron Microscopy (FESEM) and linear sweep photovoltammetry. XRD analysis revealed the amorphous nature of the as-anodized samples which crystallize after calcination in open air atmosphere at 500 oC for 2 hours. TiO2 films synthesized via anodization on polished Ti substrate demonstrated pure anatase phase only whereas anodization of etched Ti foil with HNO3 showed a mixture of anatase and rutile phase. Different morphologies of TiO2 could be obtained depending on the applied voltage used. Both as-anodized and calcined TiO2 films showed photocurrent response when illuminated from 300 W halogen lamp with that synthesized via anodization of etched Ti foil exhibited relatively higher photocurrent than the other samples, demonstrating the important of surface treatment of Ti on the photoelectrochemical response of TiO2 film. |
| first_indexed | 2025-11-15T08:06:51Z |
| format | Article |
| id | upm-16304 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T08:06:51Z |
| publishDate | 2009 |
| publisher | Institut Kimia Malaysia |
| recordtype | eprints |
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| spelling | upm-163042015-10-05T07:19:20Z http://psasir.upm.edu.my/id/eprint/16304/ Preparation and characterization of nanostructured TiO2 via electrochemical anodization in aqueous ammonium fluoride Lim, Ying Chin Zainal, Zulkarnain Hussein, Mohd Zobir Tan, Wee Tee Electrochemical anodization of titanium (Ti) in acidic fluorinated electrolyte has emerged as a simple and straightforward method to synthesize TiO2 coating on Ti substrates directly. In this study, attempt was made to perform the anodic oxidation of Ti foil in a standard two-electrode bath containing relatively mild electrolyte, NH4F at various potentials for 1 hour. The resulting TiO2 films were characterized with X-ray Diffraction (XRD), Field Emission Scanning Electron Microscopy (FESEM) and linear sweep photovoltammetry. XRD analysis revealed the amorphous nature of the as-anodized samples which crystallize after calcination in open air atmosphere at 500 oC for 2 hours. TiO2 films synthesized via anodization on polished Ti substrate demonstrated pure anatase phase only whereas anodization of etched Ti foil with HNO3 showed a mixture of anatase and rutile phase. Different morphologies of TiO2 could be obtained depending on the applied voltage used. Both as-anodized and calcined TiO2 films showed photocurrent response when illuminated from 300 W halogen lamp with that synthesized via anodization of etched Ti foil exhibited relatively higher photocurrent than the other samples, demonstrating the important of surface treatment of Ti on the photoelectrochemical response of TiO2 film. Institut Kimia Malaysia 2009 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/16304/1/Preparation%20and%20characterization%20of%20nanostructured%20TiO2%20via%20electrochemical%20anodization%20in%20aqueous%20ammonium%20fluoride.pdf Lim, Ying Chin and Zainal, Zulkarnain and Hussein, Mohd Zobir and Tan, Wee Tee (2009) Preparation and characterization of nanostructured TiO2 via electrochemical anodization in aqueous ammonium fluoride. Malaysian Journal of Chemistry, 11 (1). pp. 129-135. ISSN 1511-2292 http://www.ikm.org.my/index.php/2012-08-30-13-21-19/malaysian-journal-of-chemistry/vol-11 |
| spellingShingle | Lim, Ying Chin Zainal, Zulkarnain Hussein, Mohd Zobir Tan, Wee Tee Preparation and characterization of nanostructured TiO2 via electrochemical anodization in aqueous ammonium fluoride |
| title | Preparation and characterization of nanostructured TiO2 via electrochemical anodization in aqueous ammonium fluoride |
| title_full | Preparation and characterization of nanostructured TiO2 via electrochemical anodization in aqueous ammonium fluoride |
| title_fullStr | Preparation and characterization of nanostructured TiO2 via electrochemical anodization in aqueous ammonium fluoride |
| title_full_unstemmed | Preparation and characterization of nanostructured TiO2 via electrochemical anodization in aqueous ammonium fluoride |
| title_short | Preparation and characterization of nanostructured TiO2 via electrochemical anodization in aqueous ammonium fluoride |
| title_sort | preparation and characterization of nanostructured tio2 via electrochemical anodization in aqueous ammonium fluoride |
| url | http://psasir.upm.edu.my/id/eprint/16304/ http://psasir.upm.edu.my/id/eprint/16304/ http://psasir.upm.edu.my/id/eprint/16304/1/Preparation%20and%20characterization%20of%20nanostructured%20TiO2%20via%20electrochemical%20anodization%20in%20aqueous%20ammonium%20fluoride.pdf |