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Photocatalyst with high catalytic activity and preparation method and application thereof

A high catalytic activity, photocatalyst technology, applied in the field of photocatalytic materials, can solve the problems of low activity, difficult to remove waste water or air organic pollutants, low catalytic efficiency, etc., to achieve good photocatalytic function, rich color, and improve catalytic efficiency. Effect

Pending Publication Date: 2020-09-15
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although traditional photocatalytic materials have a certain photocatalytic effect, the existing photocatalytic materials have low activity and low catalytic efficiency, and it is difficult to efficiently remove organic pollutants in wastewater or air.

Method used

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  • Photocatalyst with high catalytic activity and preparation method and application thereof
  • Photocatalyst with high catalytic activity and preparation method and application thereof
  • Photocatalyst with high catalytic activity and preparation method and application thereof

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preparation example Construction

[0041] The present invention also provides a method for preparing a photocatalyst with high catalytic activity described in the above technical solution, comprising the following steps:

[0042] The heat-stable toning material, the diatomite and the photocatalyst precursor are mixed and then calcined to obtain the photocatalyst.

[0043] In the present invention, unless otherwise specified, all raw materials are commercially available products well known to those skilled in the art.

[0044] The present invention has no special limitation on the mixing, as long as it can be mixed uniformly.

[0045] In the present invention, the catalyst precursor preferably includes a graphite phase carbon nitride precursor and titanium dioxide; the graphite phase carbon nitride precursor is preferably urea, melamine or dicyandiamide. When the graphite phase carbon nitride precursor is urea, the mass ratio of the obtained carbon nitride to urea is preferably 3 to 10:100, more preferably 6 to...

Embodiment 1

[0057] With 20g titanium nickel yellow, 20g diatomaceous earth (specific surface area is 80m 2 / g, the pore volume is 1.1cm 3 / g, the silicon dioxide content is 70%), 60g of titanium dioxide (average particle size is 25nm) and 3000g of urea are mixed; the mixture is heated up to 550°C at a heating rate of 2.5°C / min, and then cooled at 550°C for 3 hours after heat preservation and calcination To room temperature, the product after cooling is ground to obtain a photocatalyst with a particle size of 1.2 μm with high catalytic activity, and the mass ratio of titanium nickel yellow, diatomaceous earth and photocatalyst in the photocatalyst with high catalytic activity is 2:2 :27.

Embodiment 2

[0059] 20g cobalt green, 20g diatomite (specific surface area is 80m 2 / g, the pore volume is 1.1cm 3 / g, the silicon dioxide content is 75%), 30g of titanium dioxide (average particle size is 25nm) and 3000g of urea are mixed; the mixture is heated up to 550°C at a heating rate of 2.5°C / min, and then cooled at 550°C for 3 hours after heat preservation and calcination To room temperature, the product after cooling is ground to obtain a photocatalyst with a particle size of 1.5 μm with high catalytic activity, and the mass ratio of titanium nickel yellow, diatomaceous earth and photocatalyst in the photocatalyst with high catalytic activity is 2:2 :twenty three.

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Abstract

The invention belongs to the technical field of photocatalytic materials, and particularly relates to a photocatalyst with high catalytic activity and a preparation method and application thereof. Theinvention provides a photocatalyst with high catalytic activity. The photocatalyst comprises a thermally stable toning material, diatomite and a photocatalyst, and the mass ratio of the thermally stable toning material to the diatomite to the photocatalyst is (1-30): (1-30): (5-50); the heat-resistant temperature of the thermally stable toning material is greater than 580 DEG C. In the invention,the diatomite can effectively capture organic pollutants in wastewater or air; the thermally stable toning material can significantly improve the visible light absorption of the photocatalyst, and the separation efficiency of photo-induced electrons and holes is greatly improved under the combined action of the toning material and the photocatalyst, so that the catalytic efficiency is improved, and the degradation of organic pollutants is accelerated.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic materials, and in particular relates to a photocatalyst with high catalytic activity and its preparation method and application. Background technique [0002] In recent years, environmental pollution has been widely concerned by the society, especially organic pollutants. Nicotine, formaldehyde, benzene, toluene, etc., as the main components of organic pollutants, threaten human health. These pollutants mainly come from industrial wastewater or residences, schools, offices, shopping malls, hotels, public buildings and various public gathering places. Materials, furniture or paints used for interior and exterior decoration. Especially the organic pollutants released by interior decoration materials are always threatening human health, so it is very necessary to efficiently remove these organic pollutants. [0003] One of the main methods to remove organic pollutants in wastewater or air is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C02F1/30C09D5/06B01D53/86B01D53/54C02F101/30C02F101/38
CPCB01J27/24C02F1/30C09D5/06B01D53/8621C02F2305/10C02F2101/30C02F2101/38B01J35/39
Inventor 高隽婷吕汪洋
Owner ZHEJIANG SCI-TECH UNIV