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Spherical SiO2-based adsorbent adopting core-shell structure as well as preparation method and application of adsorbent

A technology of spherical silica and shell structure, applied in chemical instruments and methods, adsorption water/sewage treatment, alkali metal oxides/hydroxides, etc., can solve problems such as dye pollution, achieve low cost, and solve treatment problems , The effect of simple process

Active Publication Date: 2015-07-29
浙江通达威鹏电气有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a preparation method of a spherical silica-based core-shell structure adsorbent, a simple and economical method to prepare an adsorbent with good adsorption performance, low cost and recyclable use, which is used to solve the problem of wastewater treatment Dye pollution and other issues in

Method used

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  • Spherical SiO2-based adsorbent adopting core-shell structure as well as preparation method and application of adsorbent
  • Spherical SiO2-based adsorbent adopting core-shell structure as well as preparation method and application of adsorbent
  • Spherical SiO2-based adsorbent adopting core-shell structure as well as preparation method and application of adsorbent

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Embodiment 1

[0024] Weigh 82g MgCl 2 ·6H 2 O was dissolved in 100mL deionized water, and after adding 3g of cetyltrimethylammonium bromide (CTAB), mechanically stirred for ten minutes to obtain the modified MgCl 2 Aqueous solution; at the same time, disperse 5g of silica microspheres in 100mL aqueous solution and add 20g of triethanolamine to obtain modified SiO 2 Dispersions. Under stirring, the modified SiO 2 The dispersion was added to the modified MgCl 2 In aqueous solution, SiO 2 / MgCl 2 Mixture. Subsequently, 50 mL of ammonia water with a concentration of 25 wt% was added dropwise to the SiO 2 / MgCl 2 In the mixed solution, the reaction was stopped after stirring in a water bath at 45° C. for 2 h. Suction filtration and washing, drying at 120°C, and calcining the dried powder in a muffle furnace at 500°C for 3 hours to obtain a spherical silica-based core-shell structure adsorbent in the form of black solid powder.

Embodiment 2

[0026] Weigh 82g MgCl 2 ·6H 2 O was dissolved in 100mL deionized water, and after adding 3g of cetyltrimethylammonium bromide (CTAB), mechanically stirred for ten minutes to obtain the modified MgCl 2 Aqueous solution; at the same time, disperse 10g of silica microspheres in 100mL aqueous solution and add 20g of triethanolamine to obtain modified SiO 2 Dispersions. Under stirring, the modified SiO 2 The dispersion was added to the modified MgCl 2 In aqueous solution, SiO 2 / MgCl 2 Mixture. Subsequently, 50 mL of ammonia water with a concentration of 26 wt% was added dropwise to the SiO 2 / MgCl 2 In the mixed solution, the reaction was stopped after stirring in a water bath at 45° C. for 2 h. Suction filtration and washing, drying at 120°C, and calcining the dried powder in a muffle furnace at 550°C for 3 hours to obtain a spherical silica-based core-shell structure adsorbent in the form of black solid powder.

Embodiment 3

[0028] Weigh 82g MgCl 2 ·6H 2 O was dissolved in 100mL deionized water, and after adding 3g of cetyltrimethylammonium bromide (CTAB), mechanically stirred for ten minutes to obtain the modified MgCl 2 aqueous solution; at the same time, 5 g of silica microspheres were dispersed in 100 mL of aqueous solution and 20 g of triethanolamine was added to obtain modified SiO 2 Dispersions. Under stirring, the modified SiO 2 The dispersion was added to the modified MgCl 2 In aqueous solution, SiO 2 / MgCl 2 Mixture. Subsequently, 50 mL of ammonia water with a concentration of 28 wt% was added dropwise to the SiO 2 / MgCl 2 In the mixed solution, the reaction was stopped after stirring in a water bath at 45° C. for 2 h. Suction filtration and washing, drying at 120°C, and calcining the dried powder in a muffle furnace at 600°C for 3 hours to obtain a spherical silica-based core-shell structure adsorbent in the form of black solid powder.

[0029] After multiple analyzes, the pre...

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Abstract

The invention discloses a spherical SiO2-based adsorbent adopting a core-shell structure as well as a preparation method and an application of the adsorbent. An MgCl2 aqueous solution and SiO2 micro-spheres are modified with a surfactant respectively, then a modified SiO2 dispersion liquid is mixed with the MgCl2 aqueous solution, meanwhile, a certain amount of stronger ammonia water is dropwise added, the mixture is stirred for a period under the water bath condition, then subjected to suction filtration, washing and drying and finally calcined in a muffle furnace, and the spherical SiO2-based adsorbent adopting the core-shell structure can be obtained. The adsorbent is large in specific surface area, high in adsorption capacity, easy to regenerate and recyclable, and the adsorption cost is reduced. The adsorbent can effectively solve the problem of treatment of dye wastewater and is potentially applied to fields of chemical engineering, petroleum, food, light industries, environmental protection and the like.

Description

technical field [0001] The invention relates to a preparation method of a novel inorganic adsorbent, in particular to a preparation method of a spherical silica-based core-shell structure adsorbent, belonging to the field of inorganic materials. Background technique [0002] Adsorption is mainly the phenomenon that the surface of a substance absorbs molecules or ions in the surrounding medium (liquid or gas). Adsorbents are solid substances that are effective in absorbing certain components from a gas or liquid. The commonly used adsorbent in industry is mainly activated carbon. Although its adsorption performance is good, its cost is relatively high and regeneration is difficult. Therefore, the preparation of a new low-cost adsorbent with good adsorption performance and recyclable use has become a research hotspot in recent years. Contents of the invention [0003] The purpose of the present invention is to provide a preparation method of a spherical silica-based core-s...

Claims

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Application Information

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IPC IPC(8): B01J20/10B01J20/28B01J20/30C02F1/28
Inventor 袁良杰裴炎炎
Owner 浙江通达威鹏电气有限公司
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