Abstract
La/Ti mixed oxides with weight ratios of 1:9, 2:8, 3:7, and 4:6 were prepared by sol-gel method. The photocatalytic activity of La/Ti oxides was evaluated based on the pCBA photodecomposition. The catalyst samples were characterized by XRD, TEM, DRS, BET, and photoluminescence (PL) spectra. Particles of the La/Ti-mixed oxides showed the diameter of about 7 nm. We found that 30% doping of lanthanum ions on the TiO2 powders induced the highest pCBA (4-chlorobenzonic acid) photodecomposition in these experimental conditions. The order of its photoactivity was as following: 30 > 20 > 0 > 10 > 40 wt%, which was the same for PL tendency. Also, PL spectra intensity increased with calcination temperature from 500 to 600 °C, then decreased at 700 °C. Phtotcatalytic activity followed the trend of the PL spectra intensity. The modification of TiO2 surface by lanthanum ion made it possible to enhance the photoactivity by retarding the recombination of photoexcited electron/hole pairs, in the result of the higher photoactivity in the stronger PL intensity.
| Original language | English |
|---|---|
| Pages (from-to) | 156-160 |
| Number of pages | 5 |
| Journal | Journal of Photochemistry and Photobiology A: Chemistry |
| Volume | 185 |
| Issue number | 2-3 |
| DOIs | |
| Publication status | Published - 2007 Jan 25 |
Fingerprint
All Science Journal Classification (ASJC) codes
- Bioengineering
- Physical and Theoretical Chemistry
Cite this
}
Photoluminescence of La/Ti mixed oxides prepared using sol-gel process and their pCBA photodecomposition. / Kim, Hong Rok; Lee, Tai Gyu; Shul, Yong-Gun.
In: Journal of Photochemistry and Photobiology A: Chemistry, Vol. 185, No. 2-3, 25.01.2007, p. 156-160.Research output: Contribution to journal › Article
TY - JOUR
T1 - Photoluminescence of La/Ti mixed oxides prepared using sol-gel process and their pCBA photodecomposition
AU - Kim, Hong Rok
AU - Lee, Tai Gyu
AU - Shul, Yong-Gun
PY - 2007/1/25
Y1 - 2007/1/25
N2 - La/Ti mixed oxides with weight ratios of 1:9, 2:8, 3:7, and 4:6 were prepared by sol-gel method. The photocatalytic activity of La/Ti oxides was evaluated based on the pCBA photodecomposition. The catalyst samples were characterized by XRD, TEM, DRS, BET, and photoluminescence (PL) spectra. Particles of the La/Ti-mixed oxides showed the diameter of about 7 nm. We found that 30% doping of lanthanum ions on the TiO2 powders induced the highest pCBA (4-chlorobenzonic acid) photodecomposition in these experimental conditions. The order of its photoactivity was as following: 30 > 20 > 0 > 10 > 40 wt%, which was the same for PL tendency. Also, PL spectra intensity increased with calcination temperature from 500 to 600 °C, then decreased at 700 °C. Phtotcatalytic activity followed the trend of the PL spectra intensity. The modification of TiO2 surface by lanthanum ion made it possible to enhance the photoactivity by retarding the recombination of photoexcited electron/hole pairs, in the result of the higher photoactivity in the stronger PL intensity.
AB - La/Ti mixed oxides with weight ratios of 1:9, 2:8, 3:7, and 4:6 were prepared by sol-gel method. The photocatalytic activity of La/Ti oxides was evaluated based on the pCBA photodecomposition. The catalyst samples were characterized by XRD, TEM, DRS, BET, and photoluminescence (PL) spectra. Particles of the La/Ti-mixed oxides showed the diameter of about 7 nm. We found that 30% doping of lanthanum ions on the TiO2 powders induced the highest pCBA (4-chlorobenzonic acid) photodecomposition in these experimental conditions. The order of its photoactivity was as following: 30 > 20 > 0 > 10 > 40 wt%, which was the same for PL tendency. Also, PL spectra intensity increased with calcination temperature from 500 to 600 °C, then decreased at 700 °C. Phtotcatalytic activity followed the trend of the PL spectra intensity. The modification of TiO2 surface by lanthanum ion made it possible to enhance the photoactivity by retarding the recombination of photoexcited electron/hole pairs, in the result of the higher photoactivity in the stronger PL intensity.
UR - http://www.scopus.com/inward/record.url?scp=33845624213&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33845624213&partnerID=8YFLogxK
U2 - 10.1016/j.jphotochem.2006.05.027
DO - 10.1016/j.jphotochem.2006.05.027
M3 - Article
AN - SCOPUS:33845624213
VL - 185
SP - 156
EP - 160
JO - Journal of Photochemistry and Photobiology A: Chemistry
JF - Journal of Photochemistry and Photobiology A: Chemistry
SN - 1010-6030
IS - 2-3
ER -