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Amino and Fe (III) bifunctional spherical mesoporous silica adsorbing material and preparation method and application thereof

A technology of mesoporous silica and spherical silica, applied in chemical instruments and methods, adsorption of water/sewage treatment, alkali metal oxides/hydroxides, etc., can solve the problem of shortened adsorption equilibrium time and failure to achieve fast Requirements and other issues, to achieve excellent removal effect, fast adsorption speed, and good removal effect

Inactive Publication Date: 2020-11-27
CENT SOUTH UNIV
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  • Application Information

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Problems solved by technology

Although the adsorption equilibrium time in this report has been greatly shortened, it still does not meet the fast requirements for real industrial applications.

Method used

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  • Amino and Fe (III) bifunctional spherical mesoporous silica adsorbing material and preparation method and application thereof
  • Amino and Fe (III) bifunctional spherical mesoporous silica adsorbing material and preparation method and application thereof
  • Amino and Fe (III) bifunctional spherical mesoporous silica adsorbing material and preparation method and application thereof

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Embodiment 1

[0058] Preparation of Amino and Fe(III) Bifunctional Spherical Mesoporous Silica Submicron Composite

[0059] (1) Preparation of spherical silica: 160 mL of absolute ethanol (EtOH), 16 mL of concentrated ammonia water and 7 g of ethyl tetrasilicate were mixed and stirred at room temperature at 750-800 rpm for 20 h. After the reaction, the silica spheres were recovered and purified by multiple centrifugation and washed with absolute ethanol, dried at 70–80°C for 12 hours to constant weight, and ground into powder.

[0060] (2) Preparation of spherical mesoporous silica: the silicon spheres (0.352g) obtained in (1) were dispersed in EtOH (20.24mL), CTAB (0.4g), H 2 In the mixture of O (80mL) and NaOH (0.104g), stir at room temperature for 30min, the molar ratio of each component is 1SiO 2 :0.18CTAB:0.44NaOH:750H 2 O:75EtOH. Then the mixture was transferred to a polytetrafluoroethylene-lined hydrothermal reactor for hydrothermal reaction at a constant temperature of 100°C for ...

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Abstract

The invention discloses an amino and Fe (III) bifunctional spherical mesoporous silica adsorbing material and a preparation method and application thereof. The preparation method provided by the invention comprises the following steps of: firstly hydrolyzing tetraethoxysilane (TEOS) serving as a silicon source under an alkaline condition to prepare main spherical silicon dioxide; then, changing the main spherical silicon dioxide into spherical mesoporous silica through a pseudomorphic transformation reaction to increase the specific surface area of the mesoporous silica; and finally, graftingamino and Fe (III) on the surface to prepare the amino and Fe (III) bifunctional spherical mesoporous silicon dioxide composite material. In the process of adsorbing As (V) in water, the amino and Fe(III) dual-functionalized spherical mesoporous silica composite material can realize adsorption of 99.24% or above of As (V) within 1 min, and the adsorption speed is far higher than that of a silicaadsorption material in the prior art.

Description

technical field [0001] The invention belongs to the technical field of adsorption material preparation, and in particular relates to an amino and Fe(III) bifunctional spherical mesoporous silica adsorption material and its preparation method and application. Background technique [0002] Arsenic (As) is a toxic and harmful element widely distributed in water bodies. Many countries in the world, such as China, the United States, Japan, etc., have experienced varying degrees of arsenic pollution in drinking water (Bissen M, Frimmel F H. Arsenic–a Review. Part I: Occurrence, Toxicity, Speciation, Mobility[J]. Acta hydrochimica ethydrobiologica, 2003, 31(1):9-18). Drinking water containing arsenic for a long time will have adverse effects on the human nervous system, cardiovascular system, gastrointestinal tract and respiratory system, and even induce cancer. Therefore, it is of great practical significance to study efficient, rapid and economical arsenic removal technology. ...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/28B01J20/10C02F1/28C02F101/10
CPCB01J20/0229B01J20/0288B01J20/103B01J20/22B01J20/28004B01J20/28016B01J2220/46B01J2220/4806B01J2220/4812C02F1/281C02F1/285C02F2101/103
Inventor 张婷吕荣涛高志襄
Owner CENT SOUTH UNIV
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