http://www.cnr.it/ontology/cnr/individuo/prodotto/ID291627
Comparison of silver nanoparticles confined in nanoporous silica prepared by chemical synthesis and by ultra-short pulsed laser ablation in liquid (Articolo in rivista)
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- Comparison of silver nanoparticles confined in nanoporous silica prepared by chemical synthesis and by ultra-short pulsed laser ablation in liquid (Articolo in rivista) (literal)
- Anno
- 2014-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1007/s00339-014-8499-8 (literal)
- Alternative label
Szegedi A.; Popova M.; Valyon J.; Guarnaccio A.; De Stefanis A.; De Bonis A.; Orlando S.; Sansone M.; Teghil R.; Santagata A. (2014)
Comparison of silver nanoparticles confined in nanoporous silica prepared by chemical synthesis and by ultra-short pulsed laser ablation in liquid
in Applied physics. A, Materials science & processing (Print)
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- Szegedi A.; Popova M.; Valyon J.; Guarnaccio A.; De Stefanis A.; De Bonis A.; Orlando S.; Sansone M.; Teghil R.; Santagata A. (literal)
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- Research Centre for Natural Sciences, Institute of Materials and Environmental Chemistry, Hungarian Academy of Sciences, Magyar tudósok körútja 2, Budapest, 1117, Hungary; Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Sofia, 1113, Bulgaria; UOS Tito Scalo, Institute of Structure of Matter, CNR, C/da S. Loja, Tito Scalo, PZ 85050, Italy; Dipartimento di Scienze, Università degli Studi della Basilicata, Via dell'Ateneo Lucano, Potenza, 10-85100, Italy; Institute of Structure of Matter, Rome Research Area-CNR, Via Salaria Km 29, 300, Monterotondo, Rome, 00016, Italy (literal)
- Titolo
- Comparison of silver nanoparticles confined in nanoporous silica prepared by chemical synthesis and by ultra-short pulsed laser ablation in liquid (literal)
- Abstract
- Hexagonally ordered mesoporous silica materials, MCM-41 and SBA-15, have been synthesized and loaded with Ag nanoparticles, utilizing both chemical synthesis and ultra-short pulsed laser ablation in liquid. In laser ablation, a silver target, immersed in aqueous suspension of ordered mesoporous silica SBA-15, was irradiated by ultra-short laser pulses to generate silver nanoparticles. For comparison, samples of similar silver contents were prepared either by incorporating silver into the SBA-15 during a hydrothermal synthesis or by introducing silver in MCM-41 by template ion-exchange. Samples were characterized by XRD, N2 physisorption, TEM and UV-vis spectroscopy. All preparations contained significant amount of 5-50 nm size silver agglomerates on the outer surface of the silica particles. The laser ablation process did not cause significant destruction of the SBA-15 structure and metallic silver (Ag0) nanoparticles were mainly generated. It is demonstrated that by laser ablation in aqueous silica suspension smaller and more uniform metallic silver particles can be produced and loaded on the surface of the silica support than by synthesis procedures. Catalytic properties of the samples have been tested in the total oxidation of toluene. Because of its favorable Ag dispersity, the Ag/SBA-15 catalyst, generated by the laser ablation method, had better catalytic stability and, relative to its Ag load, higher activity than the conventional Ag/SBA-15 preparations (literal)
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