Characterization and structural investigation of fractal porous-silica over an extremely wide scale range of pore size

JOURNAL OF COLLOID AND INTERFACE SCIENCE

卷:336

Article

Ono, Yusuke¹  Mayama, Hiroyuki¹  Furo, Istvan^2,3  Sagidullin, Alexander I.^2,3  Matsushima, Keiichiro⁴  Ura, Hafuo⁴  Uchiyama, Tomoyuki⁴  Tsujii, Kaoru^1,5 

[1] Hokkaido Univ, Res Inst Elect Sci, Nanotechnol Res Ctr, Sapporo, Hokkaido 0010021, Japan

[2] Royal Inst Technol, Dept Chem, Ind NMR Ctr, SE-10044 Stockholm, Sweden

[3] Royal Inst Technol, Div Phys Chem, SE-10044 Stockholm, Sweden

[4] Hokkaido Ind Res Inst, Environm & Energy Dept, Div Environm Syst, Sapporo, Hokkaido 0600819, Japan

[5] JST, CREST, Kawaguchi, Saitama 3388570, Japan

关键词: Fractal;    Pore size distribution;    Specific surface area;    Hierarchical porous structure;    Sol-gel synthesis;    Mercury porosimetry;    H-1 NMR cryoporometry;    Nitrogen gas adsorption;   

DOI  :  10.1016/j.jcis.2009.03.087

来源: Elsevier

【 摘 要 】

We have succeeded in creating Menger sponge-like fractal body, i.e., porous-silica samples with Menger sponge-like fractal geometries, by a novel template method utilizing template particles of alkylketene dimer (AKD) and a sol-gel synthesis of tetramethyl orthosilicate (TMOS). We report here the first experimental results on characterization and structural investigations of the fractal porous-silica samples prepared with various conditions such as calcination temperature and packing condition of the template particles. in order to characterize the fractal porous-silica samples, pore volume distribution, porosity and specific Surface area were measured over an extremely wide scale from*1 nm to 100 mu m by means of Mercury porosimetry, H-1 NMR cryoporometry, nitrogen gas adsorption experiments together with direct evaluations of cross-sectional fractal dimension D-cs, and size limits of D-cs. We have found that the pore volume distribution and specific surface area of the fractal porous-silica samples can be discussed in terms of different fractal porous Structures at different scale regions. Crown Copyright (C) 2009 Published by Elsevier Inc. All rights reserved.

【 授权许可】

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