Abstract
TiO2 nano-powders were prepared by hydrolysing titanium tetraisopropoxide at room temperature. The resulting products were dried at 382 K and then annealed at temperatures up to 1172 K for 1 h. Raman analysis showed different titania phase structures depending on the thermal treatment. A mixture of brookite and anatase was observed in the as-prepared sample and after thermal treatment at 472 K and 672 K, a mixture of anatase and rutile was observed at 872 K and 972 K, while a pure rutile phase was identified at 1172 K. Quantitative XRD analysis revealed nano-powders phase composition and crystallite sizes. The photoactivity was assessed by photoinduced degradation of methyl orange. All anatase-brookite compositions have showed high photoactivity while the best values were observed for the sample calcined at 472 K.
| Language | English |
|---|---|
| Pages | 125-129 |
| Number of pages | 5 |
| Journal | Journal of Photochemistry and Photobiology A: Chemistry |
| Volume | 210 |
| Issue number | 2-3 |
| Early online date | 18 Jan 2010 |
| DOIs | |
| Publication status | Published - 25 Feb 2010 |
| Externally published | Yes |
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Thermally induced phase and photocatalytic activity evolution of polymorphous titania. / Mahdjoub, N.; Allen, N.; Kelly, P.; Vishnyakov, V.
In: Journal of Photochemistry and Photobiology A: Chemistry, Vol. 210, No. 2-3, 25.02.2010, p. 125-129.Research output: Contribution to journal › Article
TY - JOUR
T1 - Thermally induced phase and photocatalytic activity evolution of polymorphous titania
AU - Mahdjoub, N.
AU - Allen, N.
AU - Kelly, P.
AU - Vishnyakov, V.
PY - 2010/2/25
Y1 - 2010/2/25
N2 - TiO2 nano-powders were prepared by hydrolysing titanium tetraisopropoxide at room temperature. The resulting products were dried at 382 K and then annealed at temperatures up to 1172 K for 1 h. Raman analysis showed different titania phase structures depending on the thermal treatment. A mixture of brookite and anatase was observed in the as-prepared sample and after thermal treatment at 472 K and 672 K, a mixture of anatase and rutile was observed at 872 K and 972 K, while a pure rutile phase was identified at 1172 K. Quantitative XRD analysis revealed nano-powders phase composition and crystallite sizes. The photoactivity was assessed by photoinduced degradation of methyl orange. All anatase-brookite compositions have showed high photoactivity while the best values were observed for the sample calcined at 472 K.
AB - TiO2 nano-powders were prepared by hydrolysing titanium tetraisopropoxide at room temperature. The resulting products were dried at 382 K and then annealed at temperatures up to 1172 K for 1 h. Raman analysis showed different titania phase structures depending on the thermal treatment. A mixture of brookite and anatase was observed in the as-prepared sample and after thermal treatment at 472 K and 672 K, a mixture of anatase and rutile was observed at 872 K and 972 K, while a pure rutile phase was identified at 1172 K. Quantitative XRD analysis revealed nano-powders phase composition and crystallite sizes. The photoactivity was assessed by photoinduced degradation of methyl orange. All anatase-brookite compositions have showed high photoactivity while the best values were observed for the sample calcined at 472 K.
KW - Anatase
KW - Brookite
KW - Photocatalysis
KW - Rutile
KW - Titanium dioxide
UR - http://www.scopus.com/inward/record.url?scp=77649273277&partnerID=8YFLogxK
U2 - 10.1016/j.jphotochem.2010.01.007
DO - 10.1016/j.jphotochem.2010.01.007
M3 - Article
VL - 210
SP - 125
EP - 129
JO - Journal of Photochemistry and Photobiology A: Chemistry
T2 - Journal of Photochemistry and Photobiology A: Chemistry
JF - Journal of Photochemistry and Photobiology A: Chemistry
SN - 1010-6030
IS - 2-3
ER -