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“Ship-in-a-Bottle” Approach to Synthesize Ag@hm-SiO2 Yolk/Shell Nanospheres
Wei-qiang Li,Guo-zhong Wang,Guang-hai Li,Yun-xia Zhang*
Author NameAffiliationE-mail
Wei-qiang Li Key Laboratory of Materials Physics, Centre for Environmental and Energy Nanomaterials and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China  
Guo-zhong Wang Key Laboratory of Materials Physics, Centre for Environmental and Energy Nanomaterials and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China  
Guang-hai Li Key Laboratory of Materials Physics, Centre for Environmental and Energy Nanomaterials and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, ChinaSchool of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, China  
Yun-xia Zhang* Key Laboratory of Materials Physics, Centre for Environmental and Energy Nanomaterials and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China yxzhang@issp.ac.cn 
Abstract:
An e ective protocol is presented for the synthesis of Ag@hm-SiO2 yolk/shell nanostructures (YSNs) via a facile “ship-in-a-bottle” method. TEM observations show that the as-obtained Ag@hm-SiO2 YSNs have a single silver core in the interior of hollow mesoporous silica (hm-SiO2) nanospheres, in which the thickness of hm-SiO2 outer shell is about 14 nm and the silver core has an average size of about 43 nm. And the content of silver in Ag@hm-SiO2 YSNs is about 10.29% based on the inductively coupled plasma measurement. The as-synthesized Ag@hm-SiO2 YSNs exhibited signi cantly enhanced catalytic performance compared with the pure Ag nanoparticles toward the reduction of 4-nitrophenol to 4-aminophenol in the presence of Na4.
Key words:  Ag@hm-SiO2, Yolk/shell, Ship-in-a-bottle, Nanoreactor
FundProject:
“瓶中造船”法合成银/空心介孔SO2蛋黄壳纳米结构
李伟强,汪国忠,李广海,张云霞*
摘要:
通过一种简单有效的“瓶中造船”的方法成功合成了银/空心介孔二氧化硅的蛋黄-蛋壳结构的纳米反应器,通过透射电镜证实这种结构的银/空心介孔SO2结构在SO2介孔空腔内含有一个银纳米颗粒,颗粒的平均尺寸约为43 nm,介空SO2空心球的平均壁厚约为14 nm. 通过ICP表征证实这种反向合成的方法得到银的质量比高达10.29%. 这种结构相比于裸露的银纳米颗粒在硼氢化钠做还原剂催化还原4-硝基苯酚到4-氨基苯酚的时候表现出了良好的催化性能.
关键词:  银/空心介孔二氧化硅,蛋黄-蛋壳,瓶中造船,纳米反应器
DOI:10.1063/1674-0068/28/cjcp1504056
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