2019
DOI: 10.1007/s10971-019-05131-y
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Influence of the synthesis parameters on the mesoporous structure and adsorption behavior of silica xerogels fabricated by sol–gel technique

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Cited by 18 publications
(4 citation statements)
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“…The molecular structure, microstructure, pore morphology, and physicochemical properties of the final materials depend on the extent of the hydrolysis-condensation reactions in the sol-gel process (Innocenzi, 2016) that are affected by the nature of the precursors, the catalyst and the molar ratios of alkoxide/H 2 O/HCl (Milea, Bogatu, & Duta, 2011;Mota, Gomes, Palhares, Nunes, & Houmard, 2019) (see Table 1). The hydrolysis reactions of TEOS and APTES form silanol (Si-OH) groups, which condense to form long and interconnected siloxane chains giving the silica matrix.…”
Section: Resultsmentioning
confidence: 99%
“…The molecular structure, microstructure, pore morphology, and physicochemical properties of the final materials depend on the extent of the hydrolysis-condensation reactions in the sol-gel process (Innocenzi, 2016) that are affected by the nature of the precursors, the catalyst and the molar ratios of alkoxide/H 2 O/HCl (Milea, Bogatu, & Duta, 2011;Mota, Gomes, Palhares, Nunes, & Houmard, 2019) (see Table 1). The hydrolysis reactions of TEOS and APTES form silanol (Si-OH) groups, which condense to form long and interconnected siloxane chains giving the silica matrix.…”
Section: Resultsmentioning
confidence: 99%
“…Multifunctional materials with controlled structural parameters under optimal reaction conditions and suitable reagents can be created using sol-gel technology [11,12]. The structure of the resulting matrices strongly depends on the structure of silane precursors (alkoxysilanes and alkylalkoxysilanes with nonhydrolyzable Si-C bonds) [13], their concentration and ratio, pH of the environment [14], type of catalyst [15], as well as the presence of organic solvents [16], amphiphilic compounds, water-soluble polymers and cells [17] in the system. Also, the use of different ratios of silane precursors with hydrolyzable and non-hydrolyzable bonds makes it possible to obtain materials with different porosities [18,19].…”
Section: Introductionmentioning
confidence: 99%
“…Na preparação de sílicas, (Mota et al, 2019) investigam a influência da adição de diferentes dosagens de HCl na fase sol e submetem-nas à adsorção de azul de metileno (AM) para avaliação da porosidade desses materiais. Em outro estudo, (G. Liu et al, 2010) sintetizam três aerogéis de sílica sob diferentes condições de secagem, usando-se tetraetilortossilicato (TEOS) como tetraalcóxissilano e soluções de HCl e NH4OH como catalisadores.…”
Section: Introductionunclassified