| Facile preparation of silver nanoparticles homogeneously immobilized in hierarchically monolithic silica using ethylene glycol as reductant. | |
MedLine Citation:
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PMID: 25007732 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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A facile and "green" method was proposed to introduce Ag nanoparticles (Ag NPs) into the hierarchically monolithic silica uniformly in the presence of (3-aminopropyl)-triethoxysilane (APTES) and ethylene glycol. APTES is used to modify the monolith by incorporating amino groups onto the surface of meso-macroporous skeletons, while ethylene glycol is employed as the productive reductant. Ag NPs are homogeneously immobilized in hierarchically monolithic silica after reduction and drying at 40 °C for different duration times, and the embedded amount of Ag NPs can reach 15.44 wt% when treated once. The embedment of Ag NPs increases with the repeat treatment and the APTES amount, without uncontrollable crystalline growth. The surface areas of Ag NPs embedded in silica monoliths after heat treatment at 300 and 400 °C are higher than those before heat treatment. The modification via APTES and the embedment of Ag NPs does not spoil the morphology of monolithic silica, while changing the pore structures of the monolith. A tentative formation process and a reduction mechanism are proposed for the modification, reduction and embedment. Ag NPs embedded in monolithic silica is promising for wide applications such as catalysis and separation. |
Authors:
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Huan Yu; Yang Zhu; Hui Yang; Kazuki Nakanishi; Kazuyoshi Kanamori; Xingzhong Guo |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2014-7-10 |
Journal Detail:
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Title: Dalton transactions (Cambridge, England : 2003) Volume: - ISSN: 1477-9234 ISO Abbreviation: Dalton Trans Publication Date: 2014 Jul |
Date Detail:
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Created Date: 2014-7-10 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101176026 Medline TA: Dalton Trans Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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