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题名: Organosilane-Assisted Transformation from Core-Shell to Yolk-Shell Nanocomposites
作者: Yang, Yan1, 2;  Liu, Jian1, 3;  Li, Xiaobo1, 2;  Liu, Xiao1, 2;  Yang, Qihua1
关键词: moveable cores ;  mesoporous shells ;  one-pot method ;  organosilane-assisted etching mechanism
刊名: CHEMISTRY OF MATERIALS
发表日期: 2011-08-23
DOI: 10.1021/cm201182d
卷: 23, 期:16, 页:3676-3684
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Materials Science
英文摘要: In this paper, we present the synthesis of yolk-shell nanocomposites (NCs) with moveable cores (Fe(3)O(4), Au nanoparticles (NPs)) and functionalized organosilica mesoporous shells by an organosilane-assisted etching approach for the first time. This synthesis method is facile, general, and rapid. By adding organosilanes such as 1, 2-bis(trimethoxysilyl)ethane (BTME) and 1,4-bis(triethoxysilyl)benzene (BTEB) into the synthetic medium of NPs@silica (Fe(3)O(4) and Au NPs) core-shell NCs, the organosilica species deposit on the surface of the core-shell NCs, while the initial silica shells can be subsequently dissolved to form the yolk-shell NCs. The formation of such yolk-shell NCs can be reasonably explained by a novel organosilane-assisted etching mechanism based on the results of FT-IR and (29)Si NMR spectroscopy. The yolk-shell NCs with Au cores exhibit much higher catalytic activity than the Au@silica core-shell NCs for the catalytic reduction of o-nitroaniline, probably due to the higher accessibility of the Au active sites in the yolk-shell NCs.
关键词[WOS]: HOLLOW MESOPOROUS SPHERES ;  DRUG-DELIVERY ;  ASYMMETRIC CATALYSIS ;  OPTICAL-PROPERTIES ;  SILICA NANORATTLE ;  CARBON SPHERES ;  NANOPARTICLES ;  TEMPLATE ;  NANOSTRUCTURES ;  NANOCATALYSTS
语种: 英语
WOS记录号: WOS:000293758900015
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142552
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
3.Univ Queensland, ARC Ctr Excellence Funct Nanomat, Australian Inst Bioengn & Nanotechnol, Brisbane, Qld 4072, Australia

Recommended Citation:
Yang, Yan,Liu, Jian,Li, Xiaobo,et al. Organosilane-Assisted Transformation from Core-Shell to Yolk-Shell Nanocomposites[J]. CHEMISTRY OF MATERIALS,2011,23(16):3676-3684.
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