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SiO2@MgSi0.84O2.68 core-shell structure adsorbent, as well as preparation method and application thereof

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

Active Publication Date: 2015-07-22
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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  • SiO2@MgSi0.84O2.68 core-shell structure adsorbent, as well as preparation method and application thereof
  • SiO2@MgSi0.84O2.68 core-shell structure adsorbent, as well as preparation method and application thereof
  • SiO2@MgSi0.84O2.68 core-shell structure adsorbent, as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0020] Mix 40g of silica sol and 8g of active magnesium oxide evenly, add a small amount of water and stir until it becomes 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 a speed of 1800rpm for 20min, dry at 120°C, and finally calcinate the dried powder in a muffle furnace at 500°C for 3h to obtain a white solid powder with a core-shell structure adsorption agent. The total mass of water added twice is 10 g.

Embodiment 2

[0022] Mix 40g of silica sol and 8g of active magnesium oxide evenly, add a small amount of water and stir until it becomes a paste, then add 3g of spherical SiO 2 Continue to stir with a small amount of water, then stir in a rotary mixer at a speed of 1800rpm for 20min, dry at 120°C, and finally calcinate the dried powder in a muffle furnace at 540°C for 3h to obtain a white solid powder with a core-shell structure adsorption agent. The total mass of water added twice is 15g.

Embodiment 3

[0024] Mix 40g of silica sol and 8g of active magnesium oxide evenly, add a small amount of water and stir until it becomes 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 a speed of 1800rpm for 20min, dry at 120°C, and finally calcinate the dried powder in a muffle furnace at 600°C for 3h to obtain a white solid powder with a core-shell structure adsorption agent. The total mass of water added twice is 20g.

[0025] The precise structure of the white solid powder adsorbent is SiO after multiple analyzes 2 MgSi 0.84 o 2.68 , that is, the silicon-magnesium complex is coated on the surface of silica microspheres to form a core-shell structure, and the powder has a large specific surface area and has good adsorption properties, which can effectively adsorb organic dyes in water, such as: crystal violet, Rhodin Ming B et al. The maximum adsorption capacity of the adsorbent for rhodamine B is 52.71 mg / g, and...

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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 novel inorganic adsorbent and its preparation method and application, in particular to a 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 development of a new adsorbent and the improvement of traditional adsorbents have become research hotspots in recent years. Contents of the inventi...

Claims

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Application Information

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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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