|
NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR) >
NISCAIR PUBLICATIONS >
Research Journals >
Indian Journal of Chemistry -Section A (IJC-A) >
IJC-A Vol.48A [2009] >
IJC-A Vol.48A(02) [February 2009] >
| Title: | Structural, optical, photoluminescence and photocatalytic characteristics of sol-gel derived CeO₂-TiO₂ films |
| Authors: | Verma, Amita
Joshi, Amish G |
| Keywords: | Photochemistry
Photoluminescence
Photocatalysis
Luminescence
Thin films
Films
Sol-gel process
Ceria
Titania |
| Issue Date: | Feb-2009 |
| Publisher: | CSIR |
| IPC Code: | Int. Cl. ⁸ B01J21/00; C01F17/00; C09K11/78; C01G23/00 |
| Abstract: | CeO₂-TiO₂ films with different Ce/Ti mole ratios have been obtained using a simple sol-gel process. The films
(1:0.25 and 1:0.5) containing more than 50% CeO₂ content show nanocrystalline characteristics. X-ray photoelectron spectroscopic study shows the variation of Ce⁴⁺/Ce³⁺ ratio with increasing TiO₂ content. Films with greater CeO₂ content exhibit higher porosity. The observed photoluminescence in the films is attributed to various defects resulting from crystallization and also to the relative amount of Ce³⁺ in the mixed oxide matrix. The transparency in the films appears to be inversely related to their photoluminescence activity, since the 1:0.5 film, which exhibits the best photoluminescence response, is incidentally also the least transparent film. The presence of photocatalytic activity in these films shows their potential use as an efficient photocatalyst. |
| Page(s): | 161-167 |
| ISSN: | 0376-4710 |
| Source: | IJC-A Vol.48A(02) [February 2009]
|
|
