Method used for preparing anatase type core-shell nanometer titanium dioxide and application of anatase type core-shell nanometer titanium dioxide in dye degradation

A nano-titanium dioxide and anatase-type technology, applied in the direction of titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve problems such as corrosion of glass and human bones, and limit development, and achieve high-efficiency photocatalytic activity and strong High cycle performance and high degradation rate

Inactive Publication Date: 2013-11-20
YUNNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, HF is a highly corrosive acid that can corrode glass and human bones, and requires extra care in storage and transportation, which limits the development of this template-free method.

Method used

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  • Method used for preparing anatase type core-shell nanometer titanium dioxide and application of anatase type core-shell nanometer titanium dioxide in dye degradation
  • Method used for preparing anatase type core-shell nanometer titanium dioxide and application of anatase type core-shell nanometer titanium dioxide in dye degradation
  • Method used for preparing anatase type core-shell nanometer titanium dioxide and application of anatase type core-shell nanometer titanium dioxide in dye degradation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] TiOSO 4 , deionized water, ethanol, and sucrose as initial raw materials, weighed 0.7g TiOSO 4, 4.0g sucrose, measure 30 ml ethanol, 10 ml distilled water, stir and mix evenly, put the mixture in a 100 ml stainless steel polytetrafluoroethylene reactor, put the reactor in an oven at 160°C, heat for 6 h, cool to room temperature. Washed, dried in vacuum at 60°C, calcined at 450°C for 4 h, and cooled to room temperature naturally. Recorded as 1# catalyst.

Embodiment 2

[0039] TiOSO 4 , deionized water, ethanol, and sucrose as initial raw materials, weighed 0.7g TiOSO 4 , 4.0g sucrose, measure 40 ml ethanol, 0ml distilled water, stir and mix evenly, put the mixed solution in a 100 ml stainless steel polytetrafluoroethylene reactor, place the reactor in an oven at 160°C, heat for 6 h, and cool to room temperature. Washed, dried in vacuum at 60°C, calcined at 450°C for 4 h, and cooled to room temperature naturally.

Embodiment 3

[0041] TiOSO 4 , deionized water, ethanol, and sucrose as initial raw materials, weighed 0.7g TiOSO 4 , 4.0g sucrose, measure 35 ml ethanol, 5 ml distilled water, stir and mix evenly, put the mixture in a 100 ml stainless steel polytetrafluoroethylene reactor, put the reactor in an oven at 160°C, heat for 6 h, cool to room temperature. Washed, dried in vacuum at 60°C, calcined at 450°C for 4 h, and cooled to room temperature naturally.

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Abstract

The invention discloses a method used for preparing anatase type core-shell nanometer titanium dioxide and application of the anatase type core-shell nanometer titanium dioxide in dye degradation, and belongs to the fields of preparation method of polycrystalline materials and application of polycrystalline materials as photocatalysts. The method comprises following steps: a titanium salt is dissolved in a mixed solution of water, ethanol and cane sugar by solvothermal method, and is subjected to thermostatic reaction in a reaction vessel; and then precipitate is washed, dried and fired so as to obtain the TiO2 photocatalyst. Effects of applications of the TiO2 powder in photocatalytic degradation of dye waste water are excellent. Templates are not needed in the method; product quality is high; reaction is simple; technologies are economic; recovery is easy; and the method is suitable for development trend of chemical techniques. The anatase type core-shell nanometer titanium dioxide is capable of degrading a plurality of dyes under photocatalytic conditions, thereby is capable of providing new technical schemes for large-scaled production of photocatalysts.

Description

technical field [0001] The invention belongs to a method for preparing a uniform polycrystalline material characterized by a specific shape, especially a method for preparing titanium dioxide with a hollow core-shell structure. [0002] The invention also relates to a photocatalyst for degrading dye wastewater. Background technique [0003] In 1977, Yokota discovered that under light conditions, TiO 2 It has photocatalytic activity for propylene epoxidation, which broadens the application range of photocatalysis and provides a new idea for the oxidation reaction of organic matter. Since then, photocatalytic materials have shown that they can use light energy to degrade organic pollutants, which shows that the material has great prospects in water environment treatment, and the development of efficient visible light photocatalysts to make full use of solar energy has always been a hot issue. However, the factors affecting photocatalysis are complex, as a typical photocataly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/08B82Y30/00B01J21/06C02F1/32
Inventor 郭洪何云波刘丽香郭园园杨项军
Owner YUNNAN UNIV
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