Preparation method of water-phase cerium fluoride microparticle and application thereof

The technology of phase cerium fluoride and cerium fluoride is applied in the field of preparation of aqueous cerium fluoride particles, which can solve the problems of poor hydrophilicity and complex preparation method, achieve easy operation, simple preparation process, and improve photocatalytic reaction activity. Effect

Inactive Publication Date: 2017-06-20
KAIFENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The existing cerium fluoride materials are still mainly used as wear-resistant additives and semiconductor materials. The preparation method is complicated, and some materials have poor hydrophilicity. When used in the aqueous phase, surface modification is often required to enhance its dispersion in aqueous solutions.
In current literature reports, cerium fluoride, as a new type of catalyst, is often combined with CeO 2 、TiO 2 recombined to form CeF 3 / CeO 2 , CeF 3 / TiO 2 Composite materials can effectively improve the efficiency of photocatalytic degradation of organic pollutants under ultraviolet light irradiation. The application of pure cerium fluoride in the field of visible light catalysis to degrade organic pollutants is rarely reported.

Method used

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  • Preparation method of water-phase cerium fluoride microparticle and application thereof
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  • Preparation method of water-phase cerium fluoride microparticle and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034]According to the molar ratio of cerium salt and fluorine-containing ammonium salt of 1:10, take 0.27g of cerium ammonium nitrate and 1.0g of ammonium hexafluorotitanate and dissolve them in 50mL of distilled water, and stir at room temperature for 10~20min to obtain cerium ions and fluoride ions. Transparent solution; stir and slowly add 0.1moL / L ammonium chloride solution to the transparent solution drop by drop until a white sol is formed and stop adding; take the above 30mL white sol and transfer it to a 50mL hydrothermal reaction kettle, and react at 160°C for 300min , cooled to room temperature, and centrifuged to obtain a micropink precipitate; wash the above micropink precipitate with distilled water and absolute ethanol, and dry at 60°C to obtain a cerium fluoride particle sample; disperse the cerium fluoride particle prepared above in water, That is, aqueous phase cerium fluoride fine particles were obtained.

[0035] Such as figure 1 As shown, the XRD diffrac...

Embodiment 2

[0037] According to the molar ratio of cerium salt and fluorine-containing ammonium salt as 1:5, take 0.27g of cerium ammonium nitrate and 0.5g of ammonium hexafluorotitanate dissolved in 50mL of distilled water, and stir at room temperature for 10~20min to obtain cerium ion and fluoride ion. Transparent solution; stir and slowly add 0.1moL / L ammonia water to the transparent solution drop by drop until a white sol is formed and stop adding; take the above 30mL white sol and transfer it to a 50mL hydrothermal reaction kettle, react at 160°C for 300min, and cool to Centrifuge at room temperature to obtain a micropink precipitate; wash the above micropink precipitate with distilled water and absolute ethanol, and dry at 60°C to obtain a sample of cerium fluoride particles; disperse the above-prepared cerium fluoride particles in water to obtain water phase cerium fluoride particles.

[0038] The XRD diffraction pattern of the cerium fluoride particle sample prepared in this examp...

Embodiment 3

[0040] According to the molar ratio of cerium salt and fluorine-containing ammonium salt as 1:7, take 0.43g of cerium nitrate and 1.39g of ammonium hexafluorotitanate and dissolve them in 50mL of distilled water, and stir at room temperature for 10~20min to obtain a transparent solution containing cerium ions and fluoride ions. solution; stir and slowly add 0.1moL / L ammonium chloride solution to the transparent solution drop by drop until a white sol is formed and stop adding; take the above 30mL white sol and transfer it to a 50mL hydrothermal reaction kettle, react at 160°C for 300min, Cool to room temperature and centrifuge to obtain a micropink precipitate; wash the above micropink precipitate with distilled water and absolute ethanol, and dry at 60°C to obtain a sample of cerium fluoride particles; disperse the above prepared cerium fluoride particles in water, that is Aqueous phase cerium fluoride fine particles were obtained.

[0041] The XRD diffraction pattern of the ...

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Abstract

The invention relates to a preparation method of a water-phase cerium fluoride microparticle and application thereof, and belongs to the technical field of photocatalysis. The preparation method has the advantages that by using ceric ammonium nitrate or cerous nitrate as a cerium source, and using ammonium hexafluorotitanate or ammonium fluoride as a fluorine source, the water-phase cerium fluoride microparticle with good dispersivity is prepared by a simpler and mild preparation technology; the good phtocatalysis property is realized under the visible light condition, and the application field of cerium fluoride is widened.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and in particular relates to a preparation method and application of water-phase cerium fluoride particles. Background technique [0002] Rare earth semiconductor materials have high chemical activity, chemical stability, and thermal stability, and have received extensive attention in the degradation of organic pollutants under visible / ultraviolet light. Some rare earth compounds containing cerium, especially cerium oxide, have attracted much attention in the field of visible light catalysis. The reported cerium-containing rare earth compounds are CeO 2 And composite materials based on it are the main category, and its photocatalytic degradation efficiency of pollutants is better than that of commercial titanium dioxide (P25). Cerium fluoride (CeF 3 ) As another class of cerium-containing compounds, it is currently mostly used in wear-resistant materials, sensors, optical thin films, up...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/00C02F1/30C02F101/30
CPCC01F17/265C01P2002/72C02F1/30C02F2101/30C02F2305/10
Inventor 韩冰王丽赵辉孙瑞敏周永恒周华
Owner KAIFENG UNIV
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