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231224s2017 xx |||||o 00| ||eng c |
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|a 10.1021/acs.langmuir.6b03873
|2 doi
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|a pubmed24n0898.xml
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|a (DE-627)NLM269399283
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|a (NLM)28248116
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Fang, Jiasheng
|e verfasserin
|4 aut
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| 245 |
1 |
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|a Fabrication of Ellipsoidal Silica Yolk-Shell Magnetic Structures with Extremely Stable Au Nanoparticles as Highly Reactive and Recoverable Catalysts
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|c 2017
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 11.05.2018
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|a Date Revised 11.05.2018
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a A novel strategy was reported for the fabrication of yolk-shell magnetic MFSVmS-Au nanocomposites (NCs) consisting of double-layered ellipsoidal mesoporous silica shells, numerous sub-4 nm Au nanoparticles (NPs), and magnetic Fe central cores. The hierarchical FSVmS NCs with ellipsoidal α-Fe2O3mSiO2/mSiO2 as yolks/shells were first prepared through the facile sol-gel template-assisted method, and plenty of extremely stable ultrafine Au NPs were postencapsulated within interlayer cavities through the unique deposition-precipitation method mediated with Au(en)2Cl3 compounds. Notably, ethylenediamine ligands were used to synthesize the stable cationic complexes, [Au(en)2]3+, that readily underwent the deprotonation reaction to chemically modify negatively charged mesoporous silica under alkaline conditions. The subsequent two-stage programmed hydrogen annealing initiated the in situ formation of Au NPs and the reduction of α-Fe2O3 to magnetic Fe, where the synthesized Au NPs were highly resistant to harsh thermal sintering even at 700 °C. Given its structural superiority and magnetic nature, the MFSVmS-Au was demonstrated to be a highly efficient and recoverable nanocatalyst with superior activity and reusability toward the reduction of 4-nitrophenol to 4-aminophenol, and the pristine morphology was retained after six recycling tests
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Zhang, Yiwei
|e verfasserin
|4 aut
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|a Zhou, Yuming
|e verfasserin
|4 aut
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| 700 |
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|a Zhao, Shuo
|e verfasserin
|4 aut
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|a Zhang, Chao
|e verfasserin
|4 aut
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|a Zhang, Hongxing
|e verfasserin
|4 aut
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|a Sheng, Xiaoli
|e verfasserin
|4 aut
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| 700 |
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|a Wang, Kunpeng
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 33(2017), 11 vom: 21. März, Seite 2698-2708
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
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|g volume:33
|g year:2017
|g number:11
|g day:21
|g month:03
|g pages:2698-2708
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|u http://dx.doi.org/10.1021/acs.langmuir.6b03873
|3 Volltext
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