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Preparation method of photocatalytic photoconductive material

A photoconductive material and photocatalytic technology, which is applied in the field of preparation of photocatalytic photoconductive materials, can solve the problems of easy shedding light utilization rate, difficulty in separation and recovery, influence on catalytic activity, etc. Active, life-extending effect

Inactive Publication Date: 2012-08-08
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, the powder photocatalyst has problems such as separation and recovery difficulties and secondary pollution during use, so thin-film photocatalysts have gradually become a new research hotspot.
Usually, the immobilization technology has the disadvantages of affecting the catalytic activity, the amount of catalyst immobilized on the carrier is small and easy to fall off, and the light utilization rate is low. Therefore, nano-TiO with high catalytic activity has been prepared. 2 and its immobilization technique have become nano-TiO 2 An important aspect of photocatalytic material research is the key to its practical application

Method used

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  • Preparation method of photocatalytic photoconductive material
  • Preparation method of photocatalytic photoconductive material

Examples

Experimental program
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Embodiment 1

[0028] 1) Prepare the original flooding solution

[0029] Add 16% butyl titanate and 5% diethanolamine to 79% absolute ethanol by volume and mix thoroughly to obtain a mixed solution, then add neodymium nitrate with 1% mass of the mixed solution to the mixed solution, and then fully stir Get the original flooding solution;

[0030] 2) Prepare drop solution

[0031] Add 8% distilled water to 92% absolute ethanol by volume, stir until fully mixed to obtain a dropwise solution;

[0032] 3) Preparation of nano-TiO 2 sol

[0033] Under vigorous stirring, drop the addition solution into the original flooding solution, and continue to stir vigorously to obtain transparent nano-TiO 2 Sol, wherein the volume percent of the dropping solution is 9%;

[0034] 4) Surface treatment

[0035] Ultrasonic cleaning and drying of the high-silica optical fiber, then immersing it in a strong alkali solution, and then ultrasonic cleaning and drying;

[0036] 5) Coating nano-TiO 2

[0037] I...

Embodiment 2

[0039] 1) Prepare the original flooding solution

[0040] Add 20% butyl titanate and 4% diethanolamine to 76% absolute ethanol by volume and mix thoroughly to obtain a mixed solution, then add neodymium nitrate with a mixed solution mass of 2% to the mixed solution, and then fully stir Get the original flooding solution;

[0041] 2) Prepare drop solution

[0042] Add 15% distilled water to 85% absolute ethanol by volume, and stir until fully mixed to obtain a dropwise solution;

[0043] 3) Preparation of nano-TiO 2 sol

[0044] Under vigorous stirring, drop the addition solution into the original flooding solution, and continue to stir vigorously to obtain transparent nano-TiO 2 Sol, wherein the volume percentage of the dropping liquid is 10%;

[0045] 4) Surface treatment

[0046] Ultrasonic cleaning and drying of the high-silica optical fiber, then immersing it in a strong alkali solution, and then ultrasonic cleaning and drying;

[0047] 5) Coating nano-TiO 2

[00...

Embodiment 3

[0050] 1) Prepare the original flooding solution

[0051] Add 22% butyl titanate and 6% diethanolamine to 72% absolute ethanol by volume and mix thoroughly to obtain a mixed solution, then add neodymium nitrate with a mixed solution mass of 3% to the mixed solution, and then fully stir Get the original flooding solution;

[0052] 2) Prepare drop solution

[0053] Add 10% distilled water to 90% absolute ethanol according to the volume ratio, stir until fully mixed to obtain the drop solution;

[0054] 3) Preparation of nano-TiO 2 sol

[0055] Under vigorous stirring, drop the addition solution into the original flooding solution, and continue to stir vigorously to obtain transparent nano-TiO 2 Sol, wherein the volume percentage of the dropping solution is 8%;

[0056] 4) Surface treatment

[0057] Ultrasonic cleaning and drying of the high-silica optical fiber, then immersing it in a strong alkali solution, and then ultrasonic cleaning and drying;

[0058] 5) Coating nan...

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Abstract

A preparation method of a photocatalytic photoconductive material is disclosed. A sol-gel method is adopted to prepare neodymium-doped nanometer TiO2 to enlarge the light response range of the neodymium-doped nanometer TiO2. The photoconductive material with photocatalytic performances is prepared by using high silica optical fibers as a carrier, and adopting a method combining vacuum dipping with sol-gel to coat modified nanometer TiO2 on surfaces of the high silica optical fibers. The immobilization of the nanometer TiO2 is realized, so problems of difficult separation and recovery, generation of secondary pollution and the like existing in the use process of a powdery photocatalyst are solved; the high silica fibers have high specific surface areas, so the amount for loading the nanometer TiO2 is substantially improved; and the photoconductive performances of the carrier material high silica fibers can furthest utilize the initiation capability of light to the catalyst, so the photocatalytic performances of the nanometer TiO2 are improved.

Description

technical field [0001] The invention relates to the field of materials, in particular to a preparation method of a photocatalytic photoconductive material loaded with neodymium-doped nano-titanium dioxide. Background technique [0002] Titanium dioxide photocatalytic materials have very broad application prospects in air purification, drinking water disinfection and industrial waste treatment, which has attracted the attention of governments and scientists all over the world. However, the powdery photocatalysts have problems such as separation and recovery difficulties and secondary pollution during use, so thin-film photocatalysts have gradually become a new research hotspot. Usually, the immobilization technology has the disadvantages of affecting the catalytic activity, the amount of catalyst immobilized on the carrier is small and easy to fall off, and the light utilization rate is low. Therefore, nano-TiO with high catalytic activity has been prepared. 2 and its immobi...

Claims

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Application Information

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IPC IPC(8): B01J23/10B01J35/06G02B6/00
Inventor 黄凤萍孙晶晶樊英鸽王保和彭莉
Owner SHAANXI UNIV OF SCI & TECH
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