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Synthetic method of TiO2 composite photocatalyst with high selective degradation

A high-selectivity, synthetic method technology, applied in the direction of organic compound/hydride/coordination complex catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of photocatalytic reaction selectivity, Photocatalyst limited life, low selectivity and other issues, to achieve the effect of low reaction conditions, low cost, high degradation efficiency

Inactive Publication Date: 2009-07-29
TAIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this catalyst also has strong adsorption and degradation capabilities for many other lipophilic organic pollutants, making its selectivity quite low.
In addition, the C8 modified layer will be photocatalytically degraded during the photocatalytic process, and the life of the photocatalyst is also very limited.
From the nature of the photocatalytic degradation reaction, the above-mentioned technologies cannot effectively solve the problem of photocatalytic reaction selectivity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Use a graduated cylinder to measure 30ml of absolute ethanol and place it in a three-necked flask, put 30ml of tetrabutyl titanate into the dropping funnel, slowly add it dropwise to the three-necked flask filled with absolute ethanol, and use a heat-collecting constant temperature Heating in a water bath with a magnetic stirrer, keeping the reaction temperature at 65°C, the dropwise addition was completed in about 0.5 hours. After that, 3 ml of acetylacetone was put into the dropping funnel and slowly added dropwise into the three-necked flask, and stirred for 0.5 hour after the dropwise addition was completed. Mix 0.55ml of nitric acid with a molar concentration of 6mol / L, 4.5ml of deionized water and 32ml of absolute ethanol in advance, put it into a dropping funnel, and then slowly add it to a three-necked flask, drop it in 0.5 hours, and stir for another 3 hours , to obtain titanium dioxide sol.

[0026] In a 50ml small beaker, dissolve 1g of 2,4-dichlorophenol in...

Embodiment 2

[0028] Use a graduated cylinder to measure 30ml of anhydrous methanol and place it in a three-necked flask, put 50ml of tetrabutyl titanate into the dropping funnel, slowly add it dropwise to the three-necked flask containing anhydrous methanol, and use a heat collector to keep the temperature Heating in a water bath with a magnetic stirrer, keeping the reaction temperature at 70°C, the dropwise addition was completed in about 0.8 hours. After that, 10 ml of acetylacetone was put into the dropping funnel and slowly added dropwise into the three-necked flask, and stirred for 0.8 hours after the dropwise addition was completed. Mix 0.55ml of nitric acid with a molar concentration of 4mol / L, 6.5ml of deionized water and 25ml of absolute ethanol in advance, put it into a dropping funnel, and then slowly add it to a three-necked flask, drop it in 0.2 hours, and stir for another 2 hours , to obtain titanium dioxide sol.

[0029] In a 50ml small beaker, dissolve 1g of 2,4-dichloroph...

Embodiment 3

[0031] Use a graduated cylinder to measure 30ml of isopropanol and place it in a three-necked flask, put 20ml of tetrabutyl titanate into the dropping funnel, slowly add it dropwise to the three-necked flask filled with isopropanol, and use a heat collector to keep the temperature Heating in a water bath with a magnetic stirrer, keeping the reaction temperature at 50°C, the dropwise addition was completed in about 0.2 hours. After that, 5ml of acetylacetone was put into the dropping funnel and slowly added dropwise into the three-necked flask, and stirred for 0.2 hours after the dropwise addition was completed. Mix 0.55ml of nitric acid with a molar concentration of 8mol / L, 3.5ml of deionized water and 40ml of absolute ethanol in advance, put it into a dropping funnel, and then slowly add it into a three-necked flask, drop it in 0.8 hours, and stir for another 5 hours , to obtain titanium dioxide sol.

[0032] In a 50ml small beaker, dissolve 1g of 2,4-dichlorophenol in 8ml o...

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PUM

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Abstract

The invention provides a method for synthesizing TiO2 composite photocatalyst with high selectivity and degradation function, belongs to the technical field of new material synthesis, and solves the problem of low selectivity in the prior photocatalysis reaction. The method for synthesizing the TiO2 composite photocatalyst with the high selectivity and the degradation function comprises the following steps: a, preparing titanium dioxide colloidal sol; b, performing hydrolytic condensation; and c, preparing the TiO2 composite photocatalyst. The TiO2 composite photocatalyst synthesized by the method for synthesizing the TiO2 composite photocatalyst with the high selectivity and the degradation function has high selectivity; and the method has the advantages of quick degradation and high degradation efficiency for 2, 4-dichlorophenol, and the like.

Description

technical field [0001] The invention relates to a TiO with degradative effect 2 Synthetic method of photocatalyst, especially a kind of TiO with highly selective catalytic degradation effect on 2,4-dichlorophenol 2 The invention relates to a synthesis method of a composite photocatalyst; it belongs to the technical field of new material synthesis. Background technique [0002] 2,4-dichlorophenol (2,4-dichlorophenol) is an important organic intermediate, mainly used in chemical industry, insecticide, preservative and paper industry. It has a foul smell and a high degree of toxicity. It is an environmental hormone and can accumulate in animals through the food chain. These pollutants are some organic substances that are difficult to be biodegraded. They not only hinder the growth and reproduction of aquatic organisms, but are also harmful to human health. Toxic pollutants on blacklist. Therefore, it is of great practical significance to control and remove low-concentration...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J31/02C02F1/30A62D3/10C02F101/34A62D101/28
Inventor 韩得满施林飞林晓雯
Owner TAIZHOU UNIV
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