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Preparation method of renewable recyclable lithium fluoride modified titanium dioxide nano catalyst

A nano-catalyst and titanium dioxide technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as poisoning, unfavorable costs, and inability to regenerate and use, and achieve simple and fast preparation methods and reduce production And use cost, the effect of strong adsorption effect

Active Publication Date: 2013-11-20
宁波优伲发高分子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the current catalysts have the problem of "poisoning" and cannot be recycled, which is not conducive to cost reduction

Method used

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  • Preparation method of renewable recyclable lithium fluoride modified titanium dioxide nano catalyst
  • Preparation method of renewable recyclable lithium fluoride modified titanium dioxide nano catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0027] The precursor solution for preparing titanium dioxide nanopowder is: 135ml of deionized water, 2.4ml of sulfuric acid with a concentration of 98%, 1.85ml of hydrochloric acid with a concentration of 37%, and 10ml of butyl titanate with a concentration of 98%. Mix the acid and water thoroughly, then add butyl titanate dropwise, stir and mix thoroughly by magnetic force to obtain a light yellow clear solution. Then pour the solution into a reaction kettle, seal it and put it into a dry box for hydrothermal reaction at 80° C. for 10 hours. After the reactor is cooled down, the precipitate generated by the reaction is poured out, washed with deionized water several times until neutral, dried and ground to obtain anatase phase titanium dioxide nanopowder.

[0028] Lithium fluoride powder and the obtained anatase phase nano-titanium dioxide were added into a mixed solution of 20ml deionized water and 30ml alcohol according to the molar ratio of Li:Ti = 0.5:1, stirred thorough...

Embodiment example 2

[0032] The precursor solution for preparing titanium dioxide nanopowder is: 135ml of deionized water, 2.4ml of sulfuric acid with a concentration of 98%, 1.85ml of hydrochloric acid with a concentration of 37%, and 10ml of butyl titanate with a concentration of 98%. After fully mixing the acid and water, add butyl titanate dropwise, and mix thoroughly by magnetic stirring to obtain a light yellow clear solution. Then pour the solution into a reaction kettle, seal it and put it into a dry box for hydrothermal reaction at 80° C. for 10 hours. After the reactor is cooled down, the precipitate generated by the reaction is poured out, washed with deionized water several times until neutral, dried and ground to obtain anatase phase titanium dioxide nanopowder.

[0033] Add lithium fluoride powder and the obtained anatase phase nano-titanium dioxide Li:Ti = 0.75:1 molar ratio to a mixed solution of 20ml deionized water and 30ml alcohol, stir well, pour into the reaction kettle, and r...

Embodiment example 3

[0037] The precursor solution for preparing titanium dioxide nanopowder is: 135ml of deionized water, 2.4ml of sulfuric acid with a concentration of 98%, 1.85ml of hydrochloric acid with a concentration of 37%, and 10ml of butyl titanate with a concentration of 98%. Mix the acid and water thoroughly, then add butyl titanate dropwise, stir and mix thoroughly by magnetic force to obtain a light yellow clear solution. Then pour the solution into a reaction kettle, seal it and put it into a dry box for hydrothermal reaction at 80° C. for 10 hours. After the reaction kettle is cooled, pour out the precipitate generated by the reaction, rinse it with deionized water several times to neutrality, and dry and grind the anatase phase titanium dioxide nanopowder.

[0038] Lithium fluoride powder and the obtained anatase phase nano-titanium dioxide Li: Ti = 1:1 molar ratio is added

[0039] A mixed solution of 20ml of deionized water and 30ml of alcohol was stirred thoroughly and poured ...

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Abstract

The invention discloses a preparation method of a renewable recyclable lithium fluoride modified titanium dioxide nano catalyst, which is mainly used for photocatalytic degradation of organic substances. The preparation method comprises the following steps: preparing anatase-phase nano titanium dioxide powder from concentrated sulfuric acid, hydrochloric acid, deionized water, anhydrous ethanol, tetrabutyl titanate and lithium fluoride by a hydrothermal process; and adding lithium fluoride and the titanium dioxide powder into a water-ethanol mixed solution to carry out secondary hydrothermal process, thereby preparing the lithium fluoride modified titanium dioxide nano catalyst. The catalyst prepared by the method has strong adsorption effect on organic substances, and can degrade organic substances under visible light. After complete adsorption, the catalyst can be renewed and recycled by 400-600 DEG C annealing treatment for 1-3 hours. The catalyst can be widely used in the fields of sewage treatment, photocatalytic organic substance degradation and the like; and the preparation method is simple, quick and pollution-free, and can implement recycling and reutilization, thereby greatly lowering the production and use cost.

Description

technical field [0001] The invention relates to a preparation method of a lithium fluoride-modified titanium dioxide nano-catalyst which can be regenerated and recycled. It is mainly used in sewage treatment and photocatalytic degradation of organic matter, and belongs to the field of semiconductor photocatalysis technology and sewage purification. Background technique [0002] Excessive consumption of water resources and environmental pollution lead to the shortage of water resources has become the primary concern of the world. The regional distribution of water resources in my country is uneven, and water resources are relatively poor. With the continuous aggravation of water pollution, the available water resources are very limited. Water pollution destroys the ecological environment, endangers human health, affects the national economy and people's livelihood, and greatly restricts the development of the national economy. Therefore, sewage treatment and purification is a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/135B01J27/32C02F1/30
Inventor 夏晓红刘浩郭美澜高云邵国胜余大凤
Owner 宁波优伲发高分子科技有限公司