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Organic dye adsorbent double mesoporous TiO2/carbon and preparation method thereof

An organic dye and double mesoporous technology, applied in the field of water pollution treatment, can solve the problems of ecological environment and drinking water hazards, heavy metals and biological toxicity, high content of organic pollutants, etc., and achieve good thermal stability and high recycling rate , the effect of large specific surface area

Inactive Publication Date: 2019-01-25
NANCHANG HANGKONG UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Organic dye wastewater is recognized as one of the main sources of industrial pollution in the world. It often contains toxic organic pollutants that are difficult to degrade, causing great harm to the ecological environment and drinking water.
Dye wastewater has deep chroma, high content of organic pollutants, complex components, heavy metals and biological toxicity, and is difficult to biodegrade. teratogenic, mutagenic) properties of organic matter, very harmful to environmental pollution, many dye wastewater is difficult to degrade with previous chemical or biological methods due to its stable nature

Method used

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  • Organic dye adsorbent double mesoporous TiO2/carbon and preparation method thereof
  • Organic dye adsorbent double mesoporous TiO2/carbon and preparation method thereof
  • Organic dye adsorbent double mesoporous TiO2/carbon and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0019] 1. (1) Synthesis of template silica microspheres: Add 500ml of absolute ethanol, 40ml of deionized water, and 20ml of ammonia water into a 1000ml beaker in turn, stir for 30min to obtain a uniform transparent solution ①, quickly add 30ml to the solution ① Ethyl orthosilicate, stirred at room temperature for 4 hours, the obtained milky white suspension ②, the solution ② was centrifuged at 13000rpm for five minutes to obtain a solid, washed 3 times with water and then 3 times with ethanol, and the washed The solid was vacuum-dried at 70°C for 12 hours, and finally calcined in air at 500°C for 3 hours to obtain silica microspheres;

[0020] (2) Synthesis of mesoporous carbon: 1.0g of silica microspheres and 1.2g of 1-allyl-2-thiourea were sequentially added to a crucible filled with 10-20ml of deionized water, heated in a water bath to 80°C, Stir for 1 hour to completely dissolve 1-allyl-2-thiourea, then put the crucible in an oven and dry it for 24 hours until it becomes ...

Embodiment 2

[0025] 1. (1) Synthesis of silica microspheres as template agent: add 500ml of absolute ethanol, 50ml of deionized water, and 30ml of ammonia water into a 1000ml beaker in turn, stir for 50min to obtain a uniform transparent solution ①, quickly add 50ml into the solution ① Ethyl orthosilicate, stirred at room temperature for 6 hours, the obtained milky white suspension ② was placed in 15000rpm centrifugation for 5 minutes to obtain a solid, washed 5 times with water and then 5 times with ethanol. The solid was vacuum-dried at 90°C for 24 hours, and finally calcined in air at 600°C for 5 hours to obtain silica microspheres;

[0026] (2) Synthesis of mesoporous carbon: 2.0g of silica microspheres and 2.4g of 1-allyl-2-thiourea were sequentially added to a crucible containing 20ml of deionized water, heated to 90°C in a water bath, and stirred for 3 Dissolve the 1-allyl-2-thiourea completely within 1 hour, then put the crucible in an oven and dry it for 30 hours until it becomes ...

Embodiment 3

[0031]1. (1) Synthesis of silica microspheres as template agent: add 500ml of absolute ethanol, 45ml of deionized water, and 25ml of ammonia water into a 1000ml beaker in turn, stir for 30min to obtain a uniform transparent solution ①, quickly add 40ml into the solution ① Ethyl orthosilicate, stirred at room temperature for 5 hours, the obtained milky white suspension ②, put the solution ② at 13000-15000rpm and centrifuge for 5 minutes to obtain a solid, wash 4 times with water and 4 times with ethanol, wash The final solid was vacuum-dried at 80°C for 18 hours, and finally calcined in air at 550°C for 4 hours to obtain silica microspheres;

[0032] (2) Synthesis of mesoporous carbon: 1.5g of silica microspheres and 1.8g of 1-allyl-2-thiourea were sequentially added to a crucible containing 15ml of deionized water, heated in a water bath to 85°C, and stirred for 2 Dissolve the 1-allyl-2-thiourea completely within 1 hour, then put the crucible in an oven and dry it for 27 hours...

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Abstract

The invention relates to the technical field of water pollution treatment, more particularly to an organic dye adsorbent double mesoporous TiO2 / carbon and a preparation method thereof. The technical scheme comprises: obtaining ordered mesoporous carbon by using silica synthesized by a sol-gel method as a templating agent through high temperature calcination and HF etching. According to the presentinvention, the preparation process has advantages of simple operation, low cost and high yield; the obtained product has advantages of good heat stability and high recycling rate, has the basically-unchanged adsorption effect after multiple recycling, and is easy to repeatedly use; and the obtained adsorbent has a special three-dimensional structure, wherein the pore channel is rational and developed, the specific surface area is large, and the adsorption sites are significantly increased compared with ordinary titanium dioxide and active carbon.

Description

technical field [0001] The invention relates to the technical field of water pollution treatment, more specifically, to an organic dye adsorbent double mesoporous TiO 2 / Carbon and methods for its preparation. Background technique [0002] Organic dye wastewater is recognized as one of the main sources of industrial pollution in the world. It often contains toxic organic pollutants that are difficult to degrade, causing great harm to the ecological environment and drinking water. Dye wastewater has deep chroma, high content of organic pollutants, complex components, heavy metals and biological toxicity, and is difficult to biodegrade. Teratogenic, mutagenic) organic substances are very harmful to environmental pollution. Many dye wastewaters are difficult to degrade by previous chemical or biological methods due to their stable properties. [0003] At present, most methods of treating wastewater use photocatalysts, TiO 2 As a photocatalyst, it has the advantages of stable...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28
CPCB01J20/20B01J20/06B01J20/28069C02F1/281C02F2101/308
Inventor 杨丽霞韩景颂茹宇星罗胜联
Owner NANCHANG HANGKONG UNIVERSITY
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