2009
DOI: 10.1039/b821308a
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Biomimetic chitosan-mediated synthesis in heterogeneous phase of bulk and mesoporous silica nanoparticles

Abstract: Both bulk and mesoporous silica nanoparticles can be obtained in the form of granular aggregates using chitosan flakes as additive under very soft biomimetic reaction conditions.Biomineralization, that is the formation under extremely soft conditions of complex hierarchical inorganic materials by biological systems, is an exciting research field of increasing interest. 1 Indeed, while technological silica production usually requires vigorous conditions at high pH, 2 certain marine organisms and some higher pla… Show more

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Cited by 38 publications
(33 citation statements)
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“…Under the acidic conditions employed, the amine group of chitosan is protonated and forms a charged NH 3 ? group which, in turn, is an even better hydrogen bonding partner than an uncharged NH 2 group [29,31]. The scheme of synthesis of chitosan-silica composite by the sol-gel method is presented in Fig.…”
Section: Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…Under the acidic conditions employed, the amine group of chitosan is protonated and forms a charged NH 3 ? group which, in turn, is an even better hydrogen bonding partner than an uncharged NH 2 group [29,31]. The scheme of synthesis of chitosan-silica composite by the sol-gel method is presented in Fig.…”
Section: Discussionmentioning
confidence: 99%
“…Plenty preparation methods of hybrid materials based on inorganic materials and polysaccharides for different applications have been studied [24][25][26][27][28][29][30][31]. Ion-imprinting concept and polysaccharide incorporated sol-gel process were applied to the preparation of a new silica-supported organic-inorganic hybrid sorbent for selective separation of Cd(II) from aqueous solution.…”
Section: Introductionmentioning
confidence: 99%
“…The solid catalysts are a mass of objects for study of the sol-gel method. In recent years, much attention has been focused on the preparation of mesoporous materials [2][3][4][5][6][7][8][9][10], specifically the composite catalysts including micro/mesoporous materials for various reactions [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29]. Zeolite has the high surface area and many strong acid sites, which give a potential for the high adsorption ability or the high activity in the reactions.…”
Section: Introductionmentioning
confidence: 99%
“…These ligands remain in the inside of the gel formed and change the extent and rate of polymerization, and their size itself also changes the size and diameter of pores formed [4]. These ligands are usually organic compounds such as carboxylic acids, alcohols [5,6], amine and organic polymers such as polyethylene oxide or biopolymer [7][8][9][10][11][12][13][14][15], and serve as not only templates for pore size and shape but also reagents for the dispersion of aluminum species and catalysts at the preparation of silica, alumina and silica-alumina in the sol-gel method.…”
Section: Introductionmentioning
confidence: 99%