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01385 am a22001573u 4500 |
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|a Koh, Pei Wen
|e author
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|a Yuliati, Leny
|e author
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|a Lee, Siew Ling
|e author
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|a Effect of transition metal oxide doping (Cr, Co, V) in the photocatalytic activity of TiO2 for congo red degradation under visible light
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|b Penerbit UTM,
|c 2014.
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|z Get fulltext
|u http://eprints.utm.my/id/eprint/52579/1/PeiWenKoh2014_Effectoftransitionmetal.pdf
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|a 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
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|a Q Science
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