Facile Mesoporous Hollow Silica Synthesis for Formaldehyde Adsorption

Abstract

Formaldehyde emitted from household products is classified as a hazardous substance that can adversely affect human health. Recently, various studies related to adsorption materials for reducing formaldehyde have been widely reported. In this study, mesoporous and mesoporous hollow silicas with amine functional groups introduced were utilized as adsorption materials for formaldehyde. Formaldehyde adsorption characteristics of mesoporous and mesoporous hollow silicas having well-developed pores were compared based on their synthesis methods—with or without a calcination process. Mesoporous hollow silica synthesized through a non-calcination process had the best formaldehyde adsorption characteristics, followed by mesoporous hollow silica synthesized through a calcination process and mesoporous silica. This is because a hollow structure has better adsorption properties than mesoporous silica due to large internal pores. The specific surface area of mesoporous hollow silica synthesized without a calcination process was also higher than that synthesized with a calcination process, leading to a better adsorption performance. This research suggests a facile synthetic method of mesoporous hollow silica and confirms its noticeable potential as a support for the adsorption of harmful gases.

New application of a periodic mesoporous nanocrystal silicon–silica composite for hyperlipidemia

“…Various studies have demonstrated the ability of PMS to adsorb a variety of substances, such as gaseous species, liquids and solids. [15][16][17] Meaningfully, PMS could be successfully applied to adsorb the substances and the substances could be released. Especially for the adsorption of substances, 17 the adsorption amount of PMS could be determined by checking the concentration of substances in the supernatant.…”

“…13,14 Moreover, various studies have demonstrated the ability of PMS to adsorb a variety of substances, such as gaseous species, liquids and solids. [15][16][17] Additionally, it was shown that co-administration of PMS in rats fed with a high-fat diet signicantly reduced weight gain as compared to a negative control group, indicating that the PMS effectively adsorbed lipid substances within the gastrointestinal tract. 18 In recent years, PMS has demonstrated excellent biocompatibility within living organisms and has been widely used as a drug carrier through intravenous administration.…”

Optimizing the method for removing MSNs templates using an ionic liquid ([C4mim]Cl)

“…The preparation and application of mesoporous materials have always been a hot research topic. Since scientists first reported their discovery [1], these materials have been widely used within the fields of adsorption, separation, catalysis, and sensing as well as for controlling drug delivery due to their unique porous structure and abundant Si-OH bonds on the surface, which facilitate chemical modification [2][3][4][5]. Mesoporous silica is a type of porous microsphere material with a pore size ranging from 2 to 50 nm.…”

Amine-Impregnated Dendritic Mesoporous Silica for the Adsorption of Formaldehyde

“…Therefore, supporting substrates such as activated carbon, zeolites, MOFs, or porous silicas have been used to hold it [ 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 ]. There are three general methods for using alkylamine or introducing the amino functional group to these substrates: Amine impregnation method: directly introduces alkylamine into the prepared substrate’s pore or structure [ 14 , 15 , 16 , 17 ]. Grafting method: makes chemical bonds between the prepared substrate and the introduced amino functional groups [ 18 , 19 ].…”

“…Amine impregnation method: directly introduces alkylamine into the prepared substrate’s pore or structure [ 14 , 15 , 16 , 17 ].…”