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Organosilane-Assisted Transformation from Core-Shell to Yolk-Shell Nanocomposites
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
2011-08-23
DOI10.1021/cm201182d
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
关键词[WOS]HOLLOW MESOPOROUS SPHERES ; DRUG-DELIVERY ; ASYMMETRIC CATALYSIS ; OPTICAL-PROPERTIES ; SILICA NANORATTLE ; CARBON SPHERES ; NANOPARTICLES ; TEMPLATE ; NANOSTRUCTURES ; NANOCATALYSTS
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.
语种英语
WOS记录号WOS:000293758900015
引用统计
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/142552
专题中国科学院大连化学物理研究所
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
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GB/T 7714
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.
APA Yang, Yan,Liu, Jian,Li, Xiaobo,Liu, Xiao,&Yang, Qihua.(2011).Organosilane-Assisted Transformation from Core-Shell to Yolk-Shell Nanocomposites.CHEMISTRY OF MATERIALS,23(16),3676-3684.
MLA Yang, Yan,et al."Organosilane-Assisted Transformation from Core-Shell to Yolk-Shell Nanocomposites".CHEMISTRY OF MATERIALS 23.16(2011):3676-3684.
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