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http://nopr.niscpr.res.in/handle/123456789/3116| 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 |
| Appears in Collections: | IJC-A Vol.48A(02) [February 2009] |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| IJCA 48A(2) 161-167.pdf | 538.82 kB | Adobe PDF | View/Open |
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