Synthesis of gold nanoparticles within silica monoliths through irradiation techniques using Au(I) and Au(III) precursors
| Autor: | Hicham El Hamzaoui, Mohamed Bouazaoui, M. Tonelli, Bruno Capoen, Massimo Gazzano, Sylvia Turrell, Maria Cristina Cassani, Odile Cristini-Robbe |
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| Přispěvatelé: | Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 (LASIRE), Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille Institut (CLIL), Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 (PhLAM), Université de Lille-Centre National de la Recherche Scientifique (CNRS), Photonique (Photonique), Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Dipartimento di Chimica 'G. Ciamician', ISOF-CNR, Alma Mater Studiorum Università di Bologna [Bologna] (UNIBO)-Alma Mater Studiorum Università di Bologna [Bologna] (UNIBO), Dipartimento di Chimica Industriale 'Toso Montanari', Alma Mater Studiorum Università di Bologna [Bologna] (UNIBO), Matteo Tonelli, Sylvia Turrell, Odile Cristini-Robbe, Hicham El Hamzaoui, Bruno Capoen, Mohamed Bouazaoui, Massimo Gazzano, Maria Cristina Cassani, Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics]
Materials science Silica monolith Reducing agent General Chemical Engineering Analytical chemistry Femtosecond pulsed laser General Chemistry Mesoporous silica Laser law.invention Mercury vapour Colloidal gold law Au(I) and Au(III) precursors GOLD NANOPARTICLES Continuous wave IRRADIATION TECHNIQUES Irradiation |
| Zdroj: | RSC Advances RSC Advances, Royal Society of Chemistry, 2014, 4, pp.26038-26045. ⟨10.1039/c4ra01315h⟩ RSC Advances, 2014, 4, pp.26038-26045. ⟨10.1039/c4ra01315h⟩ RSC advances 4 (2014): 26038–26045. doi:10.1039/c4ra01315h info:cnr-pdr/source/autori:Tonelli, Matteo; Turrell, Sylvia; Cristini-Robbe, Odile; El Hamzaoui, Hicham; Capoen, Bruno; Bouazaoui, Mohamed; Gazzano, Massimo; Cassani, Maria Cristina/titolo:Synthesis of gold nanoparticles within silica monoliths through irradiation techniques using Au(I) and Au(III) precursors/doi:10.1039%2Fc4ra01315h/rivista:RSC advances/anno:2014/pagina_da:26038/pagina_a:26045/intervallo_pagine:26038–26045/volume:4 |
| ISSN: | 2046-2069 |
| Popis: | International audience; The formation of gold nanoparticles (GNPs) within mesoporous silica matrices by means of irradiation techniques is reported. The xerogels were impregnated with solutions of two different gold precursors: (Ph3P)AuCl for Au(I) and [nBu4N]AuCl4 for Au(III). The irradiations were performed with two continuous wave laser sources (266 and 532 nm), with a femtosecond pulsed laser (800 nm), and with a mercury vapour lamp emitting in the UV region. It has been shown that no reducing agent was ever required to obtain GNP formation. XRD data exhibited the typical patterns of fcc gold, except for two cases involving the Au(I)-doped matrices, where a preferential crystallographic orientation was observed. Excluding the case of the UV irradiations performed on Au(III)-doped samples, we always obtained the formation of roughly spherical and well dispersed GNPs of relatively small size (6-60 nm). The gold-reduction mechanisms proposed depend on the chosen irradiation technique. Moreover, when laser sources are employed, GNP formation can be selectively limited to the irradiated areas, thus making it possible to obtain reproducible patterns of GNPs. |
| Databáze: | OpenAIRE |
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