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题名: Fabrication of hierarchically porous silica nanospheres through sol-gel process and pseudomorphic transformation
作者: Jin, Changzi1;  Wang, Junhu1;  Wang, Yanjie1;  Tang, Hailian1;  Lu, Ting1
关键词: Silica nanosphere ;  Hierarchical pore ;  Sol-gel process ;  Pseudomorphic transformation ;  PVP
刊名: JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
发表日期: 2014-04-01
DOI: 10.1007/s10971-014-3273-0
卷: 70, 期:1, 页:53-61
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Technology
类目[WOS]: Materials Science, Ceramics
研究领域[WOS]: Materials Science
英文摘要: Hierarchically porous silica nanospheres with well-defined morphology and uniform particle size had been synthesized through a multistep sol-gel method combined with pseudomorphic transformation in the presence of polyvinylpyrrolidone (PVP) and cetyltrimethylammoium bromide (CTAB) as dual template. The prepared materials were characterized by small-angle X-ray diffraction, transmission electron microscopy, scanning electron microscopy, and nitrogen physical adsorption techniques. The preparation process and the origin of hierarchical structure were also investigated. It had been shown that the hierarchical structure of synthesized materials comprises wormlike framework mesopores with diameters of about 3 nm and bubble-like pores with diameters of 20-30 nm. CTAB and PVP behave as dual-template and are responsible for the formation of the mesopores and big pores, respectively. Not only the porous structure, but also the morphology and particle size of hierarchical materials can be adjusted by controlling the addition of PVP. In addition, the formation process of hierarchically porous silica was investigated by transmission electron microscopy, FT-IR spectra and thermo-gravimetric curves and a possible synthetic mechanism had been proposed.
关键词[WOS]: MESOPOROUS SILICA ;  TEMPLATE ;  SPHERES ;  SHELL ;  NANOPARTICLES ;  SIZE ;  NANOSTRUCTURES ;  MORPHOLOGY ;  PARTICLES ;  RELEASE
语种: 英语
WOS记录号: WOS:000333207800009
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/145466
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, Lab Catalysts & New Mat Aerosp, Dalian 116023, Peoples R China

Recommended Citation:
Jin, Changzi,Wang, Junhu,Wang, Yanjie,et al. Fabrication of hierarchically porous silica nanospheres through sol-gel process and pseudomorphic transformation[J]. JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY,2014,70(1):53-61.
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