One-pot synthesis of M (M = Ag, Au)@SiO2 yolk-shell structures via an organosilane-assisted method: preparation, formation mechanism and application in heterogeneous catalysis | |
Department | 先进润滑与防护材料研究发展中心 |
Chen Y(陈钰)1,2; Wang QH(王齐华)1; Wang TM(王廷梅)1; Wang QH(王齐华) | |
The second department | 固体润滑国家重点实验室 |
2015 | |
Source Publication | Dalton Transactions |
ISSN | 1477-9226 |
Volume | 44Issue:19Pages:8867-8875 |
Abstract | We demonstrate the fabrication of yolk–shell catalysts consisting of a single M (M = Ag, Au) nanoparticle encapsulated within a hollow mesoporous organosilica shell via an organosilane-assisted strategy. The advantages of our method lie in its good controllability of the void space as well as the thickness of the mesoporous shell. The M@CTAB/SiO2 synthesized through a modified Stöber method can transform to yolk–shell structures after adding (3-aminopropyl)trimethoxysilane (APTMS)/TEOS or (3-aminopropyl)triethoxysilane (APTES)/TEOS into the synthetic medium. We give unambiguous evidence that the middle CTAB/SiO2 layer transforms into a less dense APTMS-rich organic–inorganic layer which was selectively removed in alkaline aqueous solution, while the amino-functionalized hybrid shells remain intact. Moreover, we discuss the role of alkylamino groups in the shell in the transformation from Ag@SiO2 nanorattles to hollow structures when impregnating the as-synthesized Ag@SiO2 nanorattles in HAuCl4 aqueous solution. The nanorattles also exhibit high catalytic activity for the catalytic reduction of p-nitrophenol. |
Subject Area | 材料科学与物理化学 |
DOI | 10.1039/c5dt00925a |
Funding Organization | the National Science Foundation for Distinguished Young Scholars of China (grant no. 51025517);the National Defense Basic Scientific Research Project (A1320110011);the National Basic Research Program of China (973 Program, grant no. 2015CB057502) |
Indexed By | SCI |
If | 4.177 |
Language | 英语 |
Funding Project | 聚合物自润滑复合材料组 |
compositor | 第一作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/18344 |
Collection | 中国科学院材料磨损与防护重点实验室/先进润滑与防护材料研究发展中心 固体润滑国家重点实验室(LSL) |
Corresponding Author | Wang QH(王齐华) |
Affiliation | 1.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China |
Recommended Citation GB/T 7714 | Chen Y,Wang QH,Wang TM,et al. One-pot synthesis of M (M = Ag, Au)@SiO2 yolk-shell structures via an organosilane-assisted method: preparation, formation mechanism and application in heterogeneous catalysis[J]. Dalton Transactions,2015,44(19):8867-8875. |
APA | Chen Y,Wang QH,Wang TM,&王齐华.(2015).One-pot synthesis of M (M = Ag, Au)@SiO2 yolk-shell structures via an organosilane-assisted method: preparation, formation mechanism and application in heterogeneous catalysis.Dalton Transactions,44(19),8867-8875. |
MLA | Chen Y,et al."One-pot synthesis of M (M = Ag, Au)@SiO2 yolk-shell structures via an organosilane-assisted method: preparation, formation mechanism and application in heterogeneous catalysis".Dalton Transactions 44.19(2015):8867-8875. |
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