a kind of sio 2 @mgsi 0.84 o 2.68 Adsorbent with core-shell structure and its preparation method and application

A core-shell structure and adsorbent technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve problems such as dye pollution, achieve low cost, strong adsorption capacity, and simple process effects

Active Publication Date: 2017-03-29
浙江通达威鹏电气有限公司
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  • Summary
  • 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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  • a kind of sio <sub>2</sub> @mgsi <sub>0.84</sub> o <sub>2.68</sub> Adsorbent with core-shell structure and its preparation method and application
  • a kind of sio <sub>2</sub> @mgsi <sub>0.84</sub> o <sub>2.68</sub> Adsorbent with core-shell structure and its preparation method and application
  • a kind of sio <sub>2</sub> @mgsi <sub>0.84</sub> o <sub>2.68</sub> Adsorbent with core-shell structure and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Mix 40g of silica sol with 8g of activated magnesia, add a small amount of water and stir to a paste, then add 2g of spherical SiO 2 Continue to stir with a small amount of water, then stir in a rotary mixer at 1800 rpm for 20 minutes, and dry at 120°C. Finally, the dried powder is calcined in a muffle furnace at 500°C for 3 hours to obtain a white solid powdery core-shell structure adsorption Agent. The total mass of water added twice is 10g.

Embodiment 2

[0022] Mix 40g of silica sol and 8g of activated magnesia evenly, add a small amount of water and stir to paste, then add 3g of spherical SiO 2 Continue to stir with a small amount of water, then stir in a rotary mixer at 1800 rpm for 20 minutes, and dry at 120°C. Finally, the dried powder is calcined in a muffle furnace at 540°C for 3 hours to obtain a white solid powder with a core-shell structure. Agent. The total mass of water added twice is 15g.

Embodiment 3

[0024] Mix 40g of silica sol with 8g of activated magnesia, add a small amount of water and stir to a paste, then add 2g of spherical SiO 2 Continue to stir with a small amount of water, then stir in a rotary mixer at 1800 rpm for 20 minutes, and dry at 120°C. Finally, the dried powder is calcined in a muffle furnace at 600°C for 3 hours to obtain a white solid powdery core-shell structure adsorption Agent. The total mass of water added twice was 20 g.

[0025] After multiple analyses, the precise structure of the white solid powder adsorbent is obtained as SiO 2 @MgSi 0.84 O 2.68 , That is, the silicon-magnesium compound is coated on the surface of the silica microspheres to form a core-shell structure, and the powder has a large specific surface area, has good adsorption, and can effectively adsorb organic dyes in water, such as crystal violet, rodin Ming B etc. The maximum adsorption capacity of the adsorbent for rhodamine B is 52.71 mg / g, and its adsorption efficiency for rh...

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Abstract

The invention discloses a SiO2@MgSi0.84O2.68 core-shell structure adsorbent, as well as a preparation method and application thereof. The preparation method comprises the following steps: uniformly mixing a silica solution and activated magnesium oxide according to the mass ratio that SiO2:MgO is 5:1; adding in water, and stirring into a paste; adding in spherical SiO2 and water, and stirring again; then stirring for 20 min at the rotating speed of 1800 rmp in a rotary stirring machine; drying at a temperature of 120 DEG C; calcining the dried powders for 3 hours at a temperature of 500-600 DEG C in a muffle furnace to obtain the novel core-shell structure adsorbent. The core-shell structure adsorbent is large in specific surface area, high in adsorption capacity, low in adsorption cost, easy for regeneration and good in recycling effect, so that the core-shell structure adsorbent can effectively solve the problem of dye wastewater treatment, and has the potential application in the industries of food, medicine, petroleum, cosmetics and the like.

Description

Technical field [0001] The invention relates to a new type of inorganic adsorbent and its preparation method and application, in particular to a kind of SiO 2 @MgSi 0.84 O 2.68 The core-shell structure adsorbent and its preparation method and application belong to the field of inorganic materials. Background technique [0002] Dyes are widely used in industry and daily life, but the pollution of dye wastewater to the environment is becoming more and more serious. Because the adsorption method has the characteristics of small investment, simple method and low cost, it is widely used in the treatment of dye wastewater. The traditional adsorbent is mainly activated carbon, which only has good adsorption performance for some water-soluble dyes, and the regeneration cost is high, which limits the application of activated carbon. Therefore, the research and development of a new adsorbent and the improvement of traditional adsorbents have become the research focus in recent years. Sum...

Claims

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Application Information

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