Photocatalytic deposition of Ag nanoparticles on TiO2: Metal precursor effect on the structural and photoactivity properties
A series of 1 wt.% Ag–TiO2 photocatalysts were obtained by photodeposition using different organic (acetylacetonate, Ag-A) and inorganic (nitrate, Ag-N, and perchlorate, Ag-C) silver precursors in order to determinate the influence of the silver precursor on final properties of the photocatalysts. T...
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| Format: | Article |
| Language: | English |
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Elsevier
2015-09-01
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| Series: | Journal of Saudi Chemical Society |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1319610315000630 |
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| author | E. Albiter M.A. Valenzuela S. Alfaro G. Valverde-Aguilar F.M. Martínez-Pallares |
| author_facet | E. Albiter M.A. Valenzuela S. Alfaro G. Valverde-Aguilar F.M. Martínez-Pallares |
| author_sort | E. Albiter |
| collection | DOAJ |
| description | A series of 1 wt.% Ag–TiO2 photocatalysts were obtained by photodeposition using different organic (acetylacetonate, Ag-A) and inorganic (nitrate, Ag-N, and perchlorate, Ag-C) silver precursors in order to determinate the influence of the silver precursor on final properties of the photocatalysts. The resulting photocatalytic materials were characterized by different techniques (UV–Vis DRS, TEM/HRTEM and XPS) and their photocatalytic activity was evaluated in the degradation of rhodamine B (used as model pollutant) in aqueous solution under simulated solar light. The photocatalytic reduction of Ag species to Ag0 on TiO2 was higher with silver nitrate as precursor compared to acetylacetonate or perchlorate. All the Ag-modified TiO2 photocatalysts exhibited a surface plasmon resonance effect in the visible region (400–530 nm) indicating different metal particle sizes depending on the Ag precursor used in their synthesis. A higher photocatalytic activity was obtained with all the Ag/TiO2 samples compared with non-modified TiO2. The descending order of photocatalytic activity was as follows: Ag-A/TiO2 ≈ Ag-N/TiO2 > Ag-C/TiO2 > TiO2-P25. The enhanced photoactivity was attributed to the presence of different amounts Ag0 nanoparticles homogeneously distributed on Ag2O and TiO2, trapping the photogenerated electrons and avoiding charge recombination. |
| first_indexed | 2024-12-23T06:34:17Z |
| format | Article |
| id | doaj.art-5ee467aa565548cfa236c8cd0c53c58f |
| institution | Directory Open Access Journal |
| issn | 1319-6103 |
| language | English |
| last_indexed | 2024-12-23T06:34:17Z |
| publishDate | 2015-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Saudi Chemical Society |
| spelling | doaj.art-5ee467aa565548cfa236c8cd0c53c58f2022-12-21T17:56:51ZengElsevierJournal of Saudi Chemical Society1319-61032015-09-0119556357310.1016/j.jscs.2015.05.009Photocatalytic deposition of Ag nanoparticles on TiO2: Metal precursor effect on the structural and photoactivity propertiesE. Albiter0M.A. Valenzuela1S. Alfaro2G. Valverde-Aguilar3F.M. Martínez-Pallares4Lab. Catálisis y Materiales, ESIQIE-Instituto Politécnico Nacional, Zacatenco, 07738 México, DF, MexicoLab. Catálisis y Materiales, ESIQIE-Instituto Politécnico Nacional, Zacatenco, 07738 México, DF, MexicoLab. Catálisis y Materiales, ESIQIE-Instituto Politécnico Nacional, Zacatenco, 07738 México, DF, MexicoCICATA Unidad Legaria-Instituto Politécnico Nacional, Legaria 694, Col. Irrigación, 11500 México, DF, MexicoLab. Catálisis y Materiales, ESIQIE-Instituto Politécnico Nacional, Zacatenco, 07738 México, DF, MexicoA series of 1 wt.% Ag–TiO2 photocatalysts were obtained by photodeposition using different organic (acetylacetonate, Ag-A) and inorganic (nitrate, Ag-N, and perchlorate, Ag-C) silver precursors in order to determinate the influence of the silver precursor on final properties of the photocatalysts. The resulting photocatalytic materials were characterized by different techniques (UV–Vis DRS, TEM/HRTEM and XPS) and their photocatalytic activity was evaluated in the degradation of rhodamine B (used as model pollutant) in aqueous solution under simulated solar light. The photocatalytic reduction of Ag species to Ag0 on TiO2 was higher with silver nitrate as precursor compared to acetylacetonate or perchlorate. All the Ag-modified TiO2 photocatalysts exhibited a surface plasmon resonance effect in the visible region (400–530 nm) indicating different metal particle sizes depending on the Ag precursor used in their synthesis. A higher photocatalytic activity was obtained with all the Ag/TiO2 samples compared with non-modified TiO2. The descending order of photocatalytic activity was as follows: Ag-A/TiO2 ≈ Ag-N/TiO2 > Ag-C/TiO2 > TiO2-P25. The enhanced photoactivity was attributed to the presence of different amounts Ag0 nanoparticles homogeneously distributed on Ag2O and TiO2, trapping the photogenerated electrons and avoiding charge recombination.http://www.sciencedirect.com/science/article/pii/S1319610315000630Ag2O heterojunctionSilver nitrateSilver acetylacetonateSilver perchlorateAg nanoparticles |
| spellingShingle | E. Albiter M.A. Valenzuela S. Alfaro G. Valverde-Aguilar F.M. Martínez-Pallares Photocatalytic deposition of Ag nanoparticles on TiO2: Metal precursor effect on the structural and photoactivity properties Journal of Saudi Chemical Society Ag2O heterojunction Silver nitrate Silver acetylacetonate Silver perchlorate Ag nanoparticles |
| title | Photocatalytic deposition of Ag nanoparticles on TiO2: Metal precursor effect on the structural and photoactivity properties |
| title_full | Photocatalytic deposition of Ag nanoparticles on TiO2: Metal precursor effect on the structural and photoactivity properties |
| title_fullStr | Photocatalytic deposition of Ag nanoparticles on TiO2: Metal precursor effect on the structural and photoactivity properties |
| title_full_unstemmed | Photocatalytic deposition of Ag nanoparticles on TiO2: Metal precursor effect on the structural and photoactivity properties |
| title_short | Photocatalytic deposition of Ag nanoparticles on TiO2: Metal precursor effect on the structural and photoactivity properties |
| title_sort | photocatalytic deposition of ag nanoparticles on tio2 metal precursor effect on the structural and photoactivity properties |
| topic | Ag2O heterojunction Silver nitrate Silver acetylacetonate Silver perchlorate Ag nanoparticles |
| url | http://www.sciencedirect.com/science/article/pii/S1319610315000630 |
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