| Fabrication of thermally stable and active bimetallic Au-Ag nanoparticles stabilized on inner wall of mesoporous silica shell | |
| 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)
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| The second department | 固体润滑国家重点实验室 |
| 2013 | |
| Source Publication | Dalton Transactions
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| ISSN | 1477-9226 |
| Volume | 42Issue:38Pages:13940-13947 |
| Abstract | A general method has been developed for the fabrication of highly dispersed and thermally stable bimetallic Au–Ag nanoparticles (NPs) stabilized on the inner wall of a mesoporous silica shell. In our approach, gold particles were formed in the first step on carbon spheres decorated with Sn2+ cations. Upon Ag+ adsorption and reduction by L-ascorbic acid in the second step, specific nanoparticles with a gold–silver alloy core and a silver nanoshell have been formed. Important evidence of the core–shell configurations of the bimetallic Au–Ag nanoparticles were clearly characterized by UV-vis, TEM and HAADF-STEM observations combined with elemental mapping and line scans. The mesoporous silica outer shell was obtained through the hydrolysis and condensation of the precursors tetraethoxysilane (TEOS) in a basic condition and cetyltrimethylammonium bromide (CTAB) as a structure-directing agent. On this basis, the nanoreactors were fabricated after calcination, which further serves as a nanoreactor for the reduction of p-nitrophenol. Furthermore, such particles have been found to be thermally stable and their sizes remain substantially unchanged even upon calcination in air at 500 °C and a reduction treatment in H2. Potentially, the method can be developed into a general approach to synthesize other highly dispersed and thermally stable bimetallic nanoparticles stabilized on the inner wall of a mesoporous silica shell. |
| Subject Area | 材料科学与物理化学 |
| DOI | 10.1039/c3dt51546j |
| Funding Organization | the National Science Foundation for Distinguished Young Scholars of China (grant no. 51025517);the National Defense Basic Scientific Research Project (A1320110011) |
| Indexed By | SCI |
| If | 4.097 |
| 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/362003/4366 |
| 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 |
| Corresponding Author | Wang QH(王齐华) |
| Affiliation | 1.Chinese Acad Sci, State Key Lab Solid Lubricat, Lanzhou Inst Chem Phys, Lanzhou 730000, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China |
| Recommended Citation GB/T 7714 | Chen Y,Wang QH,Wang TM,et al. Fabrication of thermally stable and active bimetallic Au-Ag nanoparticles stabilized on inner wall of mesoporous silica shell[J]. Dalton Transactions,2013,42(38):13940-13947. |
| APA | Chen Y,Wang QH,Wang TM,&王齐华.(2013).Fabrication of thermally stable and active bimetallic Au-Ag nanoparticles stabilized on inner wall of mesoporous silica shell.Dalton Transactions,42(38),13940-13947. |
| MLA | Chen Y,et al."Fabrication of thermally stable and active bimetallic Au-Ag nanoparticles stabilized on inner wall of mesoporous silica shell".Dalton Transactions 42.38(2013):13940-13947. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| 陈.pdf（3422KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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