Fabrication of hierarchically porous silica nanospheres through sol-gel process and pseudomorphic transformation

	Fabrication of hierarchically porous silica nanospheres through sol-gel process and pseudomorphic transformation
	Jin, Changzi; Wang, Junhu; Wang, Yanjie; Tang, Hailian; Lu, Ting
刊名	journal of sol-gel science and technology
	2014-04-01
卷号	70 期号:1 页码:53-61
关键词	Silica nanosphere Hierarchical pore Sol-gel process Pseudomorphic transformation PVP
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.
WOS标题词	science & technology ; technology
类目[WOS]	materials science, ceramics
研究领域[WOS]	materials science
关键词[WOS]	mesoporous silica ; template ; spheres ; shell ; nanoparticles ; size ; nanostructures ; morphology ; particles ; release
收录类别	SCI
语种	英语
WOS记录号	WOS:000333207800009
公开日期	2016-05-09
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/145466]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
作者单位	Chinese Acad Sci, Dalian Inst Chem Phys, Lab Catalysts & New Mat Aerosp, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	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.
APA	Jin, Changzi,Wang, Junhu,Wang, Yanjie,Tang, Hailian,&Lu, Ting.(2014).Fabrication of hierarchically porous silica nanospheres through sol-gel process and pseudomorphic transformation.journal of sol-gel science and technology,70(1),53-61.
MLA	Jin, Changzi,et al."Fabrication of hierarchically porous silica nanospheres through sol-gel process and pseudomorphic transformation".journal of sol-gel science and technology 70.1(2014):53-61.