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Preparation method for preparing titanium dioxide photochemical catalyst by ionic liquid

A technology of titanium dioxide and photocatalyst, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of limitation, high recombination rate of photogenerated electrons and holes, low photon quantum efficiency, etc., and achieve crystallization Good, the wavelength range of excitation light is increased, and the particle size is uniform

Inactive Publication Date: 2010-10-20
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But due to TiO 2 The photocatalyst has a wide energy band gap (Eg=3.2eV, λ=387nm), and only under the excitation of ultraviolet light with incident light λ less than 387nm, can the electrons in the valence band jump to the conduction band to form the separation of photogenerated electrons and holes, and then occur Oxidation-reduction reaction, and the recombination rate of photogenerated electrons and holes is high, and the photon quantum efficiency is low, which limits its practical application

Method used

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  • Preparation method for preparing titanium dioxide photochemical catalyst by ionic liquid
  • Preparation method for preparing titanium dioxide photochemical catalyst by ionic liquid
  • Preparation method for preparing titanium dioxide photochemical catalyst by ionic liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The high-efficiency titanium dioxide photocatalyst of the present embodiment is made up of following raw material by volume percentage:

[0024] 45% absolute ethanol, 35% butyl titanate, 13% 1-butyl-3-methylimidazolium hexafluorophosphate ionic liquid, 5% distilled water, 1.6% acetylacetone, mass fraction of 20% to 22% Concentrated hydrochloric acid 0.4%.

[0025] The preparation method of this embodiment:

[0026] (1) Add 25ml of absolute ethanol, 35ml of butyl titanate and 1.6ml of acetylacetone in sequence into a reaction kettle with appropriate volume and mechanical stirring, and stir for 1 hour to obtain solution A.

[0027] (2) In another suitable volume reactor with mechanical stirring, add dehydrated alcohol 20ml, 1-butyl-3-methylimidazolium hexafluorophosphate ionic liquid 13ml, distilled water 5ml and concentrated hydrochloric acid ( The mass fraction is 20%~22%) 0.4ml, stirred for 0.5 hours to obtain solution B.

[0028] (3) Slowly pour solution B into sol...

Embodiment 2

[0030] The high-efficiency titanium dioxide photocatalyst of the present embodiment is made up of following components by volume percentage:

[0031] 46% of absolute ethanol, 34% of butyl titanate, 14% of 1-butyl-3-methylimidazolium hexafluorophosphate ionic liquid, 4.8% of distilled water, 1% of acetylacetone, concentrated hydrochloric acid (mass fraction is 20%~ 22%) 0.2%.

[0032] The preparation method of this embodiment:

[0033] (1) Add 26ml of absolute ethanol, 34ml of butyl titanate and 1ml of acetylacetone in sequence into a reaction kettle with appropriate volume and mechanical stirring, and stir for 1 hour to obtain solution A.

[0034] (2) Add 20ml of dehydrated ethanol, 14ml of 1-butyl-3-methylimidazolium hexafluorophosphate ionic liquid, 4.8ml of distilled water and concentrated hydrochloric acid to another reactor with appropriate volume and mechanical stirring (Mass fraction is 20%-22%) 0.2ml, stirred for 0.5 hours to obtain solution B.

[0035] (3) Slowly p...

Embodiment 3

[0037] The high-efficiency titanium dioxide photocatalyst of the present embodiment is made up of following components by volume percentage:

[0038] 48% of absolute ethanol, 34% of butyl titanate, 12% of 1-butyl-3-methylimidazolium hexafluorophosphate ionic liquid, 4.6% of distilled water, 1.1% of acetylacetone, concentrated hydrochloric acid (mass fraction is 20%~ 22%) 0.3%.

[0039] The preparation method of this embodiment:

[0040] (1) Add 25ml of absolute ethanol, 34ml of butyl titanate and 1.1ml of acetylacetone in sequence into a reaction kettle with appropriate volume and mechanical stirring, and stir for 1 hour to obtain solution A.

[0041] (2) Add 23ml of dehydrated ethanol, 13ml of 1-butyl-3-methylimidazolium hexafluorophosphate ionic liquid, 4.6ml of distilled water and concentrated hydrochloric acid to another reactor with appropriate volume and mechanical stirring (Mass fraction is 20%-22%) 0.3ml, stirred for 0.5 hours to obtain solution B.

[0042] (3) Slow...

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Abstract

The invention discloses a preparation method for preparing titanium dioxide photochemical catalyst by ionic liquid, which comprises the following steps: solution A is obtained by adding absolute ethyl alcohol, tetrabutyl orthotita and methyl ethyl diketone to an agitated reactor with mechanical stirring in sequence and then stirring; solution B is obtained by adding absolute ethyl alcohol, 1-butyl-3-methylimidazolium hexafluorophosphate ionic liquid, distilled water and concentrated hydrochloric acid to an agitated reactor with mechanical stirring in sequence and then stirring; transparent light yellow collosol is obtained by mixing the solution A with the solution B and then stirring; the light yellow collosol is stoved at 100 DEG C in a vacuum drying oven with heat in a muffle furnace being preserved for 1 hour, the muffle furnace is heated and then heat is preserved for 2 hours, finally the light yellow collosol taken out from the muffle furnace to reach indoor temperature by natural cooling to obtain the titanium dioxide photochemical catalyst. The invention takes 1-butyl-3-methylimidazolium hexafluorophosphate ionic liquid as organic solution medium so as to obtain a high efficient titanium dioxide photochemical catalyst which has uniform granularity, good crystallization, increscent exciting light wavelength coverage and ampliative light absorption coverage.

Description

technical field [0001] The invention belongs to the technical field of environmental chemical engineering and environmental protection, and in particular relates to a preparation method of a titanium dioxide photocatalyst prepared by ionic liquid. Background technique [0002] In recent years, refractory sustainable pollutants and highly toxic pollutants in water bodies have caused considerable pollution threats to the environment in which humans live. How to effectively degrade toxic and harmful pollutants without causing secondary pollution to the environment , is the current research focus and hotspot of water treatment technology. [0003] Through research, it was found that TiO 2 With good photocatalytic properties, it can promote water purification and effectively degrade toxic and harmful pollutants at the same time. It has become a hot spot in the current water treatment technology research. But due to TiO 2 The photocatalyst has a wide energy band gap (Eg=3.2eV, ...

Claims

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Application Information

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IPC IPC(8): B01J21/06
Inventor 吴雅睿吴永新
Owner CHANGAN UNIV
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