Handoko, Chanel and Moustakas, Nikolaos and Peppel, Tim and Springer, Armin and Oropeza, Freddy and Huda, Adri and Bustan, Muhammad and Yudono, Bambang and Gulo, Fakhili and Strunk, Jennifer (2019) Characterization and Effect of Ag(0) vs. Ag(I) Species and Their Localized Plasmon Resonance on Photochemically Inactive TiO2. Catalysts, 9 (4). p. 323. ISSN 2073-4344
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Abstract
Commercial TiO2 (anatase) was successfully modified with Ag nanoparticles at different nominal loadings (1%–4%) using a liquid impregnation method. The prepared materials retained the anatase structure and contained a mixture of Ag0 and AgI species. Samples exhibited extended light absorption to the visible region. The effect of Ag loading on TiO2 is studied for the photocatalytic reduction of CO2 to CH4 in a gas–solid process under high-purity conditions. It is remarkable that the reference TiO2 used in this work is entirely inactive in this reaction, but it allows for studying the effect of Ag on the photocatalytic process in more detail. Only in the case of 2% Ag/TiO2 was the formation of CH4 from CO2 observed. Using different light sources, an influence of the localized surface plasmon resonance (LSPR) effect of Ag is verified. A sample in which all Ag has been reduced to the metallic state was less active than the respective sample containing both Ag0 and Ag+ , indicating that a mixed oxidation state is beneficial for photocatalytic performance. These results contribute to a better understanding of the effect of metal modification of TiO2 in photocatalytic CO2 reduction
| Item Type: | Article |
|---|---|
| Subjects: | Q Science > QD Chemistry > QD146-197 Inorganic chemistry |
| Divisions: | 11-Postgraduates Study > 95029-Environmental Science (S3) |
| Depositing User: | Prof. Dr. Fakhili Gulö |
| Date Deposited: | 31 Jan 2023 03:44 |
| Last Modified: | 31 Jan 2023 03:44 |
| URI: | http://repository.unsri.ac.id/id/eprint/88335 |
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