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Preparation method of rear earth europium doped hollow nano TiO2 glass micro beads

A hollow glass microbead and nanotechnology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve the problem of lack of photocatalytic layer, and achieve easy operation. , save raw materials, increase the effect of specific surface area

Inactive Publication Date: 2014-10-01
XI'AN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, ferric sulfate, sodium thiosulfate and urea are used to coat hollow glass microspheres with magnetic nano Fe 3 o 4 particles, and then use tetraethyl orthosilicate to coat the spherical SiO 2 The middle layer, and finally use titanium sulfate, urea and europium nitrate to coat europium-doped nano-TiO 2 The composite modification method of the photocatalytic layer has not yet

Method used

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  • Preparation method of rear earth europium doped hollow nano TiO2 glass micro beads
  • Preparation method of rear earth europium doped hollow nano TiO2 glass micro beads
  • Preparation method of rear earth europium doped hollow nano TiO2 glass micro beads

Examples

Experimental program
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Effect test

Embodiment 1

[0104]Weigh 10g of hollow glass microspheres, add them to 1L of tap water at 40°C, stir at 100rpm for 5min, then raise the temperature of tap water to 70°C, soak at constant temperature for 1h, let it stand until it cools down to room temperature naturally, After the hollow glass microspheres are stratified, remove the hollow glass microspheres floating on the upper surface of the tap water, and rinse with tap water once to complete the flotation and cleaning of the hollow glass microspheres to obtain clean hollow glass microspheres. ;Add 10g of sodium hydroxide to 1L of deionized water to prepare a sodium hydroxide solution with a mass concentration of 10g / L; take the flotation clean hollow glass beads and add them to a temperature of 40°C and a mass concentration of 10g / L In the sodium hydroxide solution, stir the hollow glass microspheres in the sodium hydroxide solution at a rate of 100rpm for 10min, then fish out the hollow glass microspheres, and wash the taken out hollow...

Embodiment 2

[0111] Weigh 20g of hollow glass microspheres, add them to 1L of tap water at 70°C, stir at 200rpm for 10min, then raise the temperature of tap water to 90°C, soak at constant temperature for 1h, let it stand until it cools down to room temperature naturally, After the hollow glass microspheres are stratified, remove the hollow glass microspheres floating on the upper surface of the tap water, and rinse with tap water for 3 times to complete the flotation and cleaning of the hollow glass microspheres to obtain clean hollow glass microspheres. ;Add 20g of sodium hydroxide to 1L of deionized water to prepare a sodium hydroxide solution with a mass concentration of 20g / L; take clean hollow glass microspheres and add them to a temperature of 80°C and a mass concentration of 10g / L sodium hydroxide In the solution, stir and process the hollow glass microspheres in the sodium hydroxide solution for 30min at a rate of 200rpm, then fish out the hollow glass microspheres, wash the taken ...

Embodiment 3

[0118] Weigh 15g of hollow glass microspheres, add them to 1L of tap water at 45°C, stir at 150rpm for 7min, then raise the temperature of tap water to 80°C, soak at constant temperature for 1h, let it stand until it cools down to room temperature naturally, After the hollow glass microspheres are stratified, remove the hollow glass microspheres floating on the upper surface of the tap water, and rinse them twice with tap water to complete the flotation and cleaning of the hollow glass microspheres, and obtain clean hollow glass microspheres. ;Add 15g of sodium hydroxide to 1L of deionized water to prepare a sodium hydroxide solution with a mass concentration of 15g / L; take the flotation clean hollow glass beads and add them to a temperature of 60°C and a mass concentration of 15g / L In the sodium hydroxide solution, stir the hollow glass microspheres in the sodium hydroxide solution at a rate of 150rpm for 20min, then take out the hollow glass microspheres, and wash the taken o...

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Abstract

The invention discloses a preparation method of rear earth europium doped hollow nano TiO2 glass micro beads. The preparation method of the rear earth europium doped hollow nano TiO2 glass micro beads comprises the following steps: firstly, coating surfaces of hollow glass micro beads with magnetic nano Fe3O4 by ferric sulfate, sodium thiosulfate, urea, polyethylene glycol-1000; then coating a SiO2 intermediate layer with tetraethoxysilane, and finally coating a europium doped nano TiO2 photocatalyst by titanous sulfate, the urea, polyvinylpyrrolidone and europium nitrate, so as to obtain the rear earth element doped hollow magnetic photocatalysis glass micro beads with core-shell structures. By adopting the preparation method, the rear earth europium doped hollow nano TiO2 glass micro beads has the excellent magnetic performance on the premise of not reducing the photocatalysis activity of TiO2.

Description

technical field [0001] The invention belongs to the technical field of preparation methods of functional inorganic non-metallic materials, and relates to a method for coating and modifying hollow glass microspheres, in particular to a rare earth europium-doped nano-TiO 2 Preparation method of hollow glass microspheres. Background technique [0002] There are two key issues in the development and application of solid and liquid photocatalytic systems: one is how to improve the catalytic activity of the catalyst; the other is the separation, recovery and reuse of the catalyst. As widely used TiO 2 For photocatalytic materials, people have conducted in-depth research on many aspects such as titanium source types, preparation conditions, crystal types, interplanar spacing, grain size, rare earth doping, and dye sensitization. Studies have shown that rare earth elements doped TiO 2 It affects its light absorption performance, charge diffusion, surface reaction, particle size a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/10B01J35/00B01J35/08
Inventor 张辉杨振威
Owner XI'AN POLYTECHNIC UNIVERSITY
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