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Nanometer titanium dioxide compound photocatalyst and preparation method thereof

A nano-titanium dioxide, composite light technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems that have not been reported on the preparation method of nano-titanium dioxide composite photocatalyst, etc., and achieve improved materials. and the effect of light utilization efficiency, good catalytic activity and good practicability

Inactive Publication Date: 2011-05-04
SHANGHAI NAT ENG RES CENT FORNANOTECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] After searching the patent literature, there is no report on the preparation method of similar nano-titanium dioxide composite photocatalyst

Method used

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  • Nanometer titanium dioxide compound photocatalyst and preparation method thereof
  • Nanometer titanium dioxide compound photocatalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Take by weighing 4.5 grams of commercial nano titanium dioxide particles with a size of 50nm, add a mass percentage concentration of 100mL of chloroauric acid solution of 5g / L, wherein the mass ratio of titanium dioxide particles and chloroauric acid is 90:10, then add the chloroauric acid solution Mix well; then add urea solution with a concentration of 0.6Mol / L, mix thoroughly, condense and reflux at 80°C for 8 hours until a pink suspension is formed; wash the suspension 3 times with deionized distilled water; Dry at constant temperature for 24 hours, and cool to room temperature to obtain a light red solid powder, which is prepared as a nano-titanium dioxide composite photocatalyst for future use.

[0023] Such as figure 1 Shown, be the TEM photo of the nano-titanium dioxide composite photocatalyst that this embodiment prepares to obtain, it can be seen that gold nanoparticles of about 5nm have been formed on the surface of random nano-titanium dioxide particles, whe...

Embodiment 2

[0025] Take by weighing 3.0 grams of commercial nano titanium dioxide particles with a size of 50nm, add a mass percentage concentration of 20g / L of chloroauric acid solution 100mL, wherein the mass ratio of titanium dioxide particles and chloroauric acid is 60:40, then add the chloroauric acid solution Mix well; then add urea solution with a concentration of 0.6Mol / L, mix thoroughly, condense and reflux at 80°C for 8 hours until a pink suspension is formed; wash the suspension 3 times with deionized distilled water; Dry at constant temperature for 24 hours, and cool to room temperature to obtain a light red solid nano-titanium dioxide composite photocatalyst, wherein the mass ratio of nano-carbon dioxide particles to gold nanoparticles is 200:1.

Embodiment 3

[0027] Take by weighing 3.0 grams of commercial nano titanium dioxide particles with a size of 50nm, add a mass percentage concentration of 20g / L of chloroauric acid solution 100mL, wherein the mass ratio of titanium dioxide particles and chloroauric acid is 60:40, then add the chloroauric acid solution Mix well; then add urea solution with a concentration of 0.6Mol / L, mix thoroughly, condense and reflux at 80°C for 8 hours until a pink suspension is formed; wash the suspension 3 times with deionized distilled water; Dry at constant temperature for 24 hours, and cool to room temperature to obtain a light red solid nano-titanium dioxide composite photocatalyst, wherein the mass ratio of nano-carbon dioxide particles to gold nanoparticles is 10:3.

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Abstract

A nanometer titanium dioxide compound photocatalyst and a preparation method thereof belong to the technical field of sewage disposal, the catalyst comprises the components as follows according to mass percentage: 60-99.5% of nanometer titanium dioxide particle and 40-0.5% of gold nanoparticle, wherein, the particle size of the nanometer titanium dioxide particle is 10-80nm, the gold nanoparticle with the particle size of 5-10nm adheres to the surface of the nanometer titanium dioxide particle. The invention adopts nanometer titanium dioxide particle and the chloroauric acid particle as raw materials, makes use of the weak reducibility of urea to prepare the compound photocatalyst which has a good visible light response, thus degrading sulfur-containing organic pollutant by photocatalysis excellently and having excellent practicability.

Description

technical field [0001] The invention relates to a catalyst in the technical field of sewage treatment and a preparation method thereof, in particular to a nano-titanium dioxide composite photocatalyst and a preparation method thereof. Background technique [0002] Since the last century, with the acceleration of the industrialization process, the application of organic dyes has become more and more extensive. Organic dyes are required to have good stability during use, but when the amount of this type of organic matter is sufficient, it is easy to accumulate in nature due to its refractory degradation, and enter the human body through various channels, especially the food chain of the ecosystem. , endangering human life and health. In recent years, the feminization phenomenon and the high incidence of cancer in animals and humans are mainly caused by these persistent organic pollutants, which are collectively referred to as POPs (Persistent Organic Pollutants) internationall...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/06B01J27/06B01J37/04C02F1/30A62D3/10A62D101/28C02F101/30
CPCY02W10/37
Inventor 黄进原弘何丹农周少锋
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH