The use of an impure inorganic precursor for the synthesis of highly siliceous mesoporous materials under acidic conditions

Puputti, Janne; Jiang, Hua; Rosenholm, Jessica M.; Hua, Jiang; Lindén, Mika

doi:10.1016/j.micromeso.2009.06.017

Cited by 11 publications

(6 citation statements)

References 26 publications

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“…This SBA-15 mesoporous material has not only shown larger pores, but also thermal, mechanical and chemical resistance properties and that makes it a preferable choice for use as a catalyst. The formation of ordered hexagonal SBA-15 with uniform pores up to 30 nm was synthesized using amphiphilic triblock copolymers in strong acidic media was reported in the literature [ 32 , 33 , 34 ]. A detailed review on types, synthesis, and applications towards Biorefinery Production of this SBA 15 mesoporous material has already been published in the literature [ 35 ].…”

Section: Developments Of Porous Materialsmentioning

confidence: 99%

A Review: Fundamental Aspects of Silicate Mesoporous Materials

2012

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Silicate mesoporous materials have received widespread interest because of their potential applications as supports for catalysis, separation, selective adsorption, novel functional materials, and use as hosts to confine guest molecules, due to their extremely high surface areas combined with large and uniform pore sizes. Over time a constant demand has developed for larger pores with well-defined pore structures. Silicate materials, with well-defined pore sizes of about 2.0–10.0 nm, surpass the pore-size constraint (<2.0 nm) of microporous zeolites. They also possess extremely high surface areas (>700 m2 g−1) and narrow pore size distributions. Instead of using small organic molecules as templating compounds, as in the case of zeolites, long chain surfactant molecules were employed as the structure-directing agent during the synthesis of these highly ordered materials. The structure, composition, and pore size of these materials can be tailored during synthesis by variation of the reactant stoichiometry, the nature of the surfactant molecule, the auxiliary chemicals, the reaction conditions, or by post-synthesis functionalization techniques. This review focuses mainly on a concise overview of silicate mesoporous materials together with their applications. Perusal of the review will enable researchers to obtain succinct information about microporous and mesoporous materials.

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Section: Developments Of Porous Materialsmentioning

confidence: 99%

A Review: Fundamental Aspects of Silicate Mesoporous Materials

2012

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“…However, high cost of complex TEOS processing motivates the development of alternative silica source. e recent studies are the synthesis of highly siliceous SBA-15 from inorganic silica sources as sodium silicate [8] and the silica inorganic precursor with the presence of impurities of industrial waste product which typically consist of metal oxide containing 42 wt% SiO 2 [9].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Mesoporous Silica SBA-15 and ZnO/SBA-15 Photocatalytic Materials from the Ash of Brickyards

Nguyen

Yến

Hau

et al. 2020

Journal of Chemistry

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SBA-15 has been successfully synthesized from ash of brickyard with the surface area of 700.100 m2/g, pore volume of 0.813 cm3·g−1, and pore size of 7.5 nm. SBA-15 material has been modified by a simple impregnation method, and the ZnO/SBA-15 obtained material retains the hexagonal structure of SBA-15, but the hexagonal capillary tube size is reduced, in which the surface area, volume of pores, and pore size is 212.851 m2·g−1, 0.244 cm3·g−1, and 3.7 nm, respectively. The ZnO/SBA-15 materials were investigated by the photodegradation of methylene blue under ultraviolet light and exhibited significant photocatalytic activity with the reached MB removal efficiency about 96.69%.

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“…Several studies have been carried out to synthesize SBA-15 with the same properties [5-8, 10, 13]. However, in order to minimize costs, various silicon sources, organic and inorganic, including industrial waste have been used with promising results [13][14][15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

SBA-15 synthesis from sodium silicate prepared with sand and sodium hydroxide

Lázaro

Rodríguez-Valadéz

López

et al. 2020

Mater. Res. Express

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In the industry, sodium carbonate is used to prepare sodium silicate; however, this process generates great volumes of CO 2 . In this work, sodium hydroxide has been proposed to prepare sodium silicate using natural sand. Two experimental variables were considered, sodium hydroxide concentration and temperature to prepare sodium silicate. Results show the formation of sodium silicate with a NaOH:sand ratio = 1.1 at 550°C. Moreover, an economical revision was achieved to compare costs of sodium silicate with sodium hydroxide and sodium carbonate. The use of sodium hydroxide permits to decrease CO 2 emissions generated in the decomposition of sodium carbonate. Additionally, the sodium silicate prepared herein was used to synthesize a zeolite type material, SBA-15. SBA-15 obtained has similar characteristics than the commercial mesoporous material. The use of sodium silicate prepared with non-pure sand for preparing mesoporous materials is an economical and friendly environmental alternative.

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The use of an impure inorganic precursor for the synthesis of highly siliceous mesoporous materials under acidic conditions

Cited by 11 publications

References 26 publications

A Review: Fundamental Aspects of Silicate Mesoporous Materials

A Review: Fundamental Aspects of Silicate Mesoporous Materials

Synthesis and Characterization of Mesoporous Silica SBA-15 and ZnO/SBA-15 Photocatalytic Materials from the Ash of Brickyards

SBA-15 synthesis from sodium silicate prepared with sand and sodium hydroxide

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