Effect of transition metal oxide doping (Cr, Co, V) in the photocatalytic activity of TiO2 for congo red degradation under visible light
Comparative study of Cr, Co or V-doped TiO2 was carried out. The photocatalysts were synthesized via sol-gel method. The results indicated that the dopants of Cr, Co, and V induced anatase to rutile phase transition of TiO2 at different dopant amounts of 1, 4, 2 mol%, respectively. Besides that, the...
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| Format: | Article |
| Language: | English |
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Penerbit UTM
2014
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| Online Access: | http://eprints.utm.my/52579/1/PeiWenKoh2014_Effectoftransitionmetal.pdf |
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| author | Koh, Pei Wen Yuliati, Leny Lee, Siew Ling |
| author_facet | Koh, Pei Wen Yuliati, Leny Lee, Siew Ling |
| author_sort | Koh, Pei Wen |
| collection | ePrints |
| description | Comparative study of Cr, Co or V-doped TiO2 was carried out. The photocatalysts were synthesized via sol-gel method. The results indicated that the dopants of Cr, Co, and V induced anatase to rutile phase transition of TiO2 at different dopant amounts of 1, 4, 2 mol%, respectively. Besides that, the existence of dopant extended the absorption wavelength of TiO2 to visible light region, thus making it a visible-driven photocatalyst. The doped transition metal exhibited different oxidation states on the TiO2 surface. The prepared photocatalysts were tested over photodegradation of Congo Red. Amongst all, Cr-doped TiO2 (3 mol%) was the best photocatalyst attributed to the presence of 45% rutile phase, reduced band gap energy of 2.30 eV and formation of Cr6+, which acted as an electron scavenger to delay the hole-electron recombination |
| first_indexed | 2024-03-05T19:31:49Z |
| format | Article |
| id | utm.eprints-52579 |
| institution | Universiti Teknologi Malaysia - ePrints |
| language | English |
| last_indexed | 2024-03-05T19:31:49Z |
| publishDate | 2014 |
| publisher | Penerbit UTM |
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| spelling | utm.eprints-525792018-09-19T05:09:44Z http://eprints.utm.my/52579/ Effect of transition metal oxide doping (Cr, Co, V) in the photocatalytic activity of TiO2 for congo red degradation under visible light Koh, Pei Wen Yuliati, Leny Lee, Siew Ling Q Science Comparative study of Cr, Co or V-doped TiO2 was carried out. The photocatalysts were synthesized via sol-gel method. The results indicated that the dopants of Cr, Co, and V induced anatase to rutile phase transition of TiO2 at different dopant amounts of 1, 4, 2 mol%, respectively. Besides that, the existence of dopant extended the absorption wavelength of TiO2 to visible light region, thus making it a visible-driven photocatalyst. The doped transition metal exhibited different oxidation states on the TiO2 surface. The prepared photocatalysts were tested over photodegradation of Congo Red. Amongst all, Cr-doped TiO2 (3 mol%) was the best photocatalyst attributed to the presence of 45% rutile phase, reduced band gap energy of 2.30 eV and formation of Cr6+, which acted as an electron scavenger to delay the hole-electron recombination Penerbit UTM 2014 Article PeerReviewed application/pdf en http://eprints.utm.my/52579/1/PeiWenKoh2014_Effectoftransitionmetal.pdf Koh, Pei Wen and Yuliati, Leny and Lee, Siew Ling (2014) Effect of transition metal oxide doping (Cr, Co, V) in the photocatalytic activity of TiO2 for congo red degradation under visible light. Jurnal Teknologi (Sciences and Engineering), 69 (5). pp. 45-50. ISSN 0127-9696 https://dx.doi.org/10.11113/jt.v69.3203 DOI: 10.11113/jt.v69.3203 |
| spellingShingle | Q Science Koh, Pei Wen Yuliati, Leny Lee, Siew Ling Effect of transition metal oxide doping (Cr, Co, V) in the photocatalytic activity of TiO2 for congo red degradation under visible light |
| title | Effect of transition metal oxide doping (Cr, Co, V) in the photocatalytic activity of TiO2 for congo red degradation under visible light |
| title_full | Effect of transition metal oxide doping (Cr, Co, V) in the photocatalytic activity of TiO2 for congo red degradation under visible light |
| title_fullStr | Effect of transition metal oxide doping (Cr, Co, V) in the photocatalytic activity of TiO2 for congo red degradation under visible light |
| title_full_unstemmed | Effect of transition metal oxide doping (Cr, Co, V) in the photocatalytic activity of TiO2 for congo red degradation under visible light |
| title_short | Effect of transition metal oxide doping (Cr, Co, V) in the photocatalytic activity of TiO2 for congo red degradation under visible light |
| title_sort | effect of transition metal oxide doping cr co v in the photocatalytic activity of tio2 for congo red degradation under visible light |
| topic | Q Science |
| url | http://eprints.utm.my/52579/1/PeiWenKoh2014_Effectoftransitionmetal.pdf |
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