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Preparation method of nano TiO2 photocatalyst particles

A photocatalyst and particle technology, applied in nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems of loss of superiority and easy aggregation of photocatalyst particles, achieve good formaldehyde degradation function, easy to large-scale industrialization, process Simple process effect

Active Publication Date: 2017-01-04
SHANGHAI REFRESH AIR TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The antibacterial effect of titanium dioxide works immediately, but in the absence of light, it loses its superiority
[0009] However, the prepared nano-TiO 2 Nano-TiO Prepared by Photocatalyst Microparticles 2 Photocatalyst particles are easy to aggregate and must work under ultraviolet light conditions, which restricts its further application

Method used

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  • Preparation method of nano TiO2 photocatalyst particles
  • Preparation method of nano TiO2 photocatalyst particles
  • Preparation method of nano TiO2 photocatalyst particles

Examples

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Effect test

Embodiment 1

[0038] Nano TiO in this embodiment 2 The preparation method of photocatalyst particle, comprises the following steps:

[0039] (1) Add 100g Ti to a 5L reactor 2 (SO 4 ) 3 , add 3L of deionized water gradually under stirring to dissolve, then slowly add 25wt% ammonia water, and continue to observe until the precipitation is complete, filter the above solution with a vacuum filter, and wash the white filter cake with water for 3 times , the washing conditions are stirring speed 600rpm, stirring time 60min, then filtering, and drying to obtain the preliminary product;

[0040](2) Transfer the above preliminary product to a 50L reaction kettle, add 20ml of 6mol / L sulfuric acid, 30g of OP-10, and 1L of deionized water, set the stirring speed to 100rpm, and the time to 100min;

[0041] (3) further add 30g sodium permanganate in the dispersed product, and convert at stirring speed 600rpm, stirring time 10min;

[0042] (4) aging the converted product at 15-25° C. under the condit...

Embodiment 2

[0044] (1) Add 100g TiCl to a 50L reactor 3 , add 2L of deionized water gradually under stirring to dissolve, then slowly add 20wt% NaOH aqueous solution, and continue to observe until the precipitation is complete, filter the above solution with a vacuum filter, and wash the white filter cake with water for 3 times, the washing conditions are stirring speed 600rpm, stirring time 60min, then filter, and dry to obtain the preliminary product;

[0045] (2) Transfer the above-mentioned preliminary product to a 5-liter reaction kettle, add 20ml of concentrated hydrochloric acid, 20g of polyethylene glycol, and 1L of deionized water, set the stirring speed to 100rpm, and the time is 100min;

[0046] (3) further add 45g potassium permanganate in the dispersed product, and convert at stirring speed 30rpm, stirring time 30min;

[0047] (4) aging the converted product at 15-25° C. under the condition of a stirring speed of 600 rpm for 40 hours to obtain the nano-TiO 2 Photocatalyst p...

Embodiment 3

[0049] (1) Add 100g TiCl to a 5L reactor 3 , add 3L of deionized water gradually under stirring to dissolve, then slowly add 30wt% potassium carbonate, and continue to observe until the precipitation is complete. After the above solution is filtered with a vacuum filter, the white filter cake is washed with water for 3 times, the washing conditions are stirring speed 600rpm, stirring time 60min, then filter, and dry to obtain the preliminary product;

[0050] (2) Transfer the above-mentioned preliminary product to a 5L reaction kettle, add 30ml of concentrated hydrochloric acid, 20g of Tween, and 1L of deionized water, set the stirring speed to 100rpm, and the time to 100min;

[0051] (3) further add 50g sodium permanganate in the dispersed product, and convert at stirring speed 300rpm, stirring time 50min;

[0052] (4) aging the converted product at 15-25° C. under the condition of a stirring speed of 30 rpm for 72 hours to obtain the nano-TiO 2 Photocatalyst particles.

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Abstract

The invention provides a preparation method of nano TiO2 photocatalyst particles. The method comprises the following steps: (1) neutralizing precipitation process; (2) dispersion process; (3) oxidative transformation process; (4) curing process. The method not only solves the problem of easy aggregation of the nano TiO2 photocatalyst particles, enables the product particle sizes to be small, enables the average particle size to be less than 30nm and enables the product to be higher in concentration, but also has a good formaldehyde degradation function under the condition of visible light and overcomes the defect that the traditional photocatalyst works only under the condition of ultraviolet light, thus being wider in application scope. The preparation method does not need high-temperature calcination or water-bath heating, is low in requirements for equipment, simple in technological process and easy to operate and control; furthermore, the preparation method can use general industrial grade raw materials, thus being economical and reasonable in cost; therefore, the method has very high market competitiveness and is easy in realization of large-scale industrialization.

Description

technical field [0001] The present invention relates to a kind of photocatalyst particle, relate in particular to a kind of nano TiO 2 Preparation method of photocatalyst particles. Background technique [0002] Compared with organic antibacterial materials, inorganic antibacterial agents have the characteristics of broad spectrum, long-lasting, and safety. At present, there are two types of inorganic antibacterial materials, one is to rely on metal ions for sterilization, and the other is to rely on photocatalyst for sterilization: [0003] (1) Metal ions [0004] Most of the heavy metal ions in the metal ions have bactericidal ability. When bacteria and metal ions come into contact, the metal ions can destroy the main structure of the bacteria, or the metal ions enter the bacterial cells and combine with the enzymes that proliferate, making the enzymes inactive and achieving anti-bacterial Antibacterial purpose. Metal ion antibacterial agents are mainly silver ions, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053B01J21/06B82Y30/00B82Y40/00
Inventor 许厚荣张云祥
Owner SHANGHAI REFRESH AIR TECH
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