Ionic liquid-facilitated synthesis and catalytic activity of highly dispersed Ag nanoclusters supported on TiO2
This study describes a one-pot sol-gel method for the synthesis of Ag/TiO2 nanocomposite powders. TEM images showed that the Ag clusters formed with this method are highly dispersed on the surface of TiO2 nanoparticles. UV/visible spectroscopy results indicated that [BMIM][PF 6], an imidazolium-base...
| Main Authors: | , , |
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| Format: | Journal Article |
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The Royal Society of Chemistry
2009
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| Online Access: | http://hdl.handle.net/20.500.11937/21329 |
| _version_ | 1848750560062210048 |
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| author | Zhang, H. Li, Xin Yong Chen, G. |
| author_facet | Zhang, H. Li, Xin Yong Chen, G. |
| author_sort | Zhang, H. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | This study describes a one-pot sol-gel method for the synthesis of Ag/TiO2 nanocomposite powders. TEM images showed that the Ag clusters formed with this method are highly dispersed on the surface of TiO2 nanoparticles. UV/visible spectroscopy results indicated that [BMIM][PF 6], an imidazolium-based room-temperature ionic liquid, strongly inhibited the formation and growth of Ag clusters in N,N-dimethylformamide (DMF) solvent. This made it possible to prepare a stable stock solution containing AgNO3-[BMIM][PF6]-DMF. Dilution of the stock solution followed by hydrolysis resulted in a gel that was processed to produce Ag/TiO2 nanocomposites containing Ag clusters with average size smaller than 3 nm. XPS results indicated that the silver species exist predominantly in the metallic form. Because of the high dispersion and controlled size of the Ag clusters, the Ag/TiO2 nanocomposites demonstrated excellent catalytic performance in the aqueous phase reduction of methylene blue and the hydrogenation of 4-nitrophenol using NaBH4 as the reducing agent. © 2009 The Royal Society of Chemistry. |
| first_indexed | 2025-11-14T07:38:46Z |
| format | Journal Article |
| id | curtin-20.500.11937-21329 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:38:46Z |
| publishDate | 2009 |
| publisher | The Royal Society of Chemistry |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-213292023-08-02T06:39:07Z Ionic liquid-facilitated synthesis and catalytic activity of highly dispersed Ag nanoclusters supported on TiO2 Zhang, H. Li, Xin Yong Chen, G. This study describes a one-pot sol-gel method for the synthesis of Ag/TiO2 nanocomposite powders. TEM images showed that the Ag clusters formed with this method are highly dispersed on the surface of TiO2 nanoparticles. UV/visible spectroscopy results indicated that [BMIM][PF 6], an imidazolium-based room-temperature ionic liquid, strongly inhibited the formation and growth of Ag clusters in N,N-dimethylformamide (DMF) solvent. This made it possible to prepare a stable stock solution containing AgNO3-[BMIM][PF6]-DMF. Dilution of the stock solution followed by hydrolysis resulted in a gel that was processed to produce Ag/TiO2 nanocomposites containing Ag clusters with average size smaller than 3 nm. XPS results indicated that the silver species exist predominantly in the metallic form. Because of the high dispersion and controlled size of the Ag clusters, the Ag/TiO2 nanocomposites demonstrated excellent catalytic performance in the aqueous phase reduction of methylene blue and the hydrogenation of 4-nitrophenol using NaBH4 as the reducing agent. © 2009 The Royal Society of Chemistry. 2009 Journal Article http://hdl.handle.net/20.500.11937/21329 10.1039/b910610c The Royal Society of Chemistry restricted |
| spellingShingle | Zhang, H. Li, Xin Yong Chen, G. Ionic liquid-facilitated synthesis and catalytic activity of highly dispersed Ag nanoclusters supported on TiO2 |
| title | Ionic liquid-facilitated synthesis and catalytic activity of highly dispersed Ag nanoclusters supported on TiO2 |
| title_full | Ionic liquid-facilitated synthesis and catalytic activity of highly dispersed Ag nanoclusters supported on TiO2 |
| title_fullStr | Ionic liquid-facilitated synthesis and catalytic activity of highly dispersed Ag nanoclusters supported on TiO2 |
| title_full_unstemmed | Ionic liquid-facilitated synthesis and catalytic activity of highly dispersed Ag nanoclusters supported on TiO2 |
| title_short | Ionic liquid-facilitated synthesis and catalytic activity of highly dispersed Ag nanoclusters supported on TiO2 |
| title_sort | ionic liquid-facilitated synthesis and catalytic activity of highly dispersed ag nanoclusters supported on tio2 |
| url | http://hdl.handle.net/20.500.11937/21329 |