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{001} surface tio2 submicron monocrystalline photocatalyst, and preparation method and application thereof

A photocatalyst and sub-micron technology, applied in the field of photocatalytic materials, can solve the problems of insufficient research and few sub-micron single crystal photocatalysts, and achieve the effects of short preparation time, avoiding rapid hydrolysis, and good ultraviolet light response

Active Publication Date: 2014-04-30
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the {001} facet anatase TiO is currently prepared by the solvothermal method. 2 There are relatively few studies on submicron single crystal photocatalysts, and their research is not deep enough

Method used

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  • {001} surface tio2 submicron monocrystalline photocatalyst, and preparation method and application thereof
  • {001} surface tio2 submicron monocrystalline photocatalyst, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Add 0.01 g of ammonium fluoride into 1 mL of anhydrous acetic acid and stir for 1 min to obtain a clarified acetic acid solution of ammonium fluoride;

[0034] Add 0.1 mL of butyl titanate dropwise to the clarified acetic acid solution of ammonium fluoride, put it into a dry polytetrafluoroethylene reactor with a volume of 10 mL, and react at 100 °C for 72 h; after the reaction solution is naturally cooled, collect The precipitate in the reaction solution was repeatedly centrifuged and washed with deionized water until the pH value of the washing solution was 6-7, and the washed precipitate was dried at 50 °C for 36 h to obtain {001} surface TiO 2 Submicron single crystal photocatalyst;

[0035] {001} surface TiO 2 Activity test of submicron single crystal photocatalyst: The photocatalytic activity of the catalyst was evaluated by photocatalytic degradation of gas phase styrene with an initial concentration of 15 ppmv under ultraviolet light. The specific steps are: u...

Embodiment 2

[0037] Add 10 g of ammonium fluoride into 100 mL of anhydrous acetic acid and stir for 60 min to obtain a clarified acetic acid solution of ammonium fluoride;

[0038] Add 10 mL of butyl titanate dropwise into the ammonium fluoride clarified acetic acid solution, put it into a dry polytetrafluoroethylene reactor with a capacity of 200 mL, and react at 250 °C for 2 h; after the reaction solution is naturally cooled, collect The precipitate in the reaction solution was repeatedly centrifuged and washed with deionized water until the pH of the washing solution was 6-7, and the washed precipitate was dried at 180 °C for 1 h to obtain the {001} surface TiO 2 Submicron single crystal photocatalyst;

[0039] {001} surface TiO 2 Submicron single crystal photocatalyst activity test: same as Example 1, the only difference lies in the {001} plane TiO 2 The dosage of submicron single crystal photocatalyst is 0.1 g. The photocatalytic degradation experiment results showed that the degra...

Embodiment 3

[0041] Add 1 g of ammonium fluoride into 20 mL of anhydrous acetic acid and stir for 20 min to obtain a clarified acetic acid solution of ammonium fluoride;

[0042]Add 5 mL of butyl titanate dropwise to the clarified acetic acid solution of ammonium fluoride, put it into a dry polytetrafluoroethylene reactor with a volume of 50 mL, and react at 150 °C for 7 h; after the reaction solution is naturally cooled, collect The precipitate in the reaction solution was repeatedly centrifuged and washed with deionized water until the pH of the washing solution was 6-7, and the washed precipitate was dried at 80 °C for 6 h to obtain the {001} surface TiO 2 Submicron single crystal photocatalyst;

[0043] {001} surface TiO 2 Submicron single crystal photocatalyst activity test: same as Example 1, the only difference lies in the {001} plane TiO 2 The dosage of submicron single crystal photocatalyst is 0.3 g. The results of photocatalytic degradation experiments showed that after 180 mi...

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Abstract

The invention discloses a {001} surface TiO2 submicron monocrystalline photocatalyst, and a preparation method and application thereof. The invention adopts acetic acid and butyl titanate for a reaction, which generates agglomerated fiber bundle; and then F ion effects on the agglomerated fiber bundle to get TiO2 submicron monocrystalline. Use of anhydrous acetic acid as a reaction medium can effectively prevent rapid hydrolysis of the titanium source, well control morphology and speed of monocrystalline formation, and get a regular uniform {001} surface TiO2 submicron monocrystalline. The preparation method is simple and low-cost, and requires short preparation time; and the prepared {001} surface TiO2 submicron monocrystalline photocatalyst has characteristics of good UV response and high quantum efficiency, and can effectively realize photocatalytic degradation of volatile organic compounds.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic materials, in particular to a {001} surface TiO 2 Submicron single crystal photocatalyst and its preparation method and application. Background technique [0002] The pollution of volatile organic compounds has brought a lot of environmental problems and seriously threatened the safety of human life. More and more physical, chemical and biological technologies are used to control the pollution of volatile organic compounds, among which photocatalytic oxidation technology can oxidize volatile organic compounds into CO due to its ability to oxidize volatile organic compounds under the irradiation of light and the presence of photocatalysts. 2 and H 2 O and much attention. [0003] Titanium dioxide (TiO 2 ) has excellent photocatalytic oxidation ability, non-toxic and cheap, and has become the most important photocatalyst in environmental purification. TiO 2 The activity of nanocrystals ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/06C01G23/053B01D53/86B01D53/72
Inventor 李桂英陈江耀聂信安太成
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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