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Solid-air interface Fenton reaction coupled carbon nitride photocatalytic material and its preparation and application

A technology of Fenton reaction and catalytic materials, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of low performance of organic pollutants, achieve increased photodegradation rate, increased concentration, The effect of photodegradation performance improvement

Inactive Publication Date: 2018-09-18
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the problems in the prior art, the present invention provides a solid-gas interface Fenton reaction coupled carbon nitride photocatalytic material and its preparation method, which can make up for the low performance of existing organic photocatalytic materials in degrading gas phase organic pollutants

Method used

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  • Solid-air interface Fenton reaction coupled carbon nitride photocatalytic material and its preparation and application
  • Solid-air interface Fenton reaction coupled carbon nitride photocatalytic material and its preparation and application
  • Solid-air interface Fenton reaction coupled carbon nitride photocatalytic material and its preparation and application

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Experimental program
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Effect test

Embodiment 1

[0030] Preparation of solid-air interface Fenton reaction coupled carbon nitride: Weigh 1.5g of melamine, 7.5g of potassium chloride, and 0.125g of sodium hydroxide, and grind the mixed powder in a mortar for 10-30min. In the crucible, seal the mouth of the crucible with aluminum foil, place it in a muffle furnace and raise the temperature to 550°C and keep it warm for 4 hours. The sintered powder is ground with a mortar, separated by suction filtration with deionized water, After drying for 2h, yellow carbon nitride was obtained. Use the configured ferric chloride solution to load ferric ions, first disperse the yellow carbon nitride sample in deionized water and stir, then add the ferric chloride solution drop by drop to 1.4% of the mass percentage of the carbon nitride sample, at room temperature After stirring for a certain period of time, it is dried in an oven and ground to obtain the final product.

[0031] Some studies on the surface properties of the product (marked ...

Embodiment 2

[0033]The impact of the amount of alkali metal chloride on the product: Weigh four parts of 1.5g of melamine and 0.125g of sodium hydroxide, then add 0.15g, 1.5g, 7.5g, and 30g of potassium chloride to each of the four samples, and mix the raw materials Grind in a mortar for 10 to 30 minutes, mix well, place in a crucible, seal the mouth of the crucible with aluminum foil, put it in a muffle furnace to raise the temperature to 550°C and keep it warm for 4 hours, and use a mortar to sinter the powder Grind, wash with deionized water and separate by suction filtration. The separated sample is dried at 80°C for 4 hours to obtain yellow carbon nitride. Use the configured ferrous sulfate solution to load ferrous ions, first disperse the yellow carbon nitride sample in deionized water and stir, then add the ferrous sulfate solution drop by drop to 3.2% of the mass percentage of the carbon nitride sample, at room temperature After stirring for a certain period of time, it is dried in...

Embodiment 3

[0035] The impact of the amount of alkali on the product: Weigh four parts of 1.5g of melamine and 7.5g of potassium chloride, then add 0.075g, 0.100g, 0.125g, and 0.150g of sodium hydroxide to the four samples. Grind in a bowl for 10 to 30 minutes, mix well, place in a crucible, seal the mouth of the crucible with aluminum foil, put it in a muffle furnace and heat it up to 550°C and keep it warm for 4 hours. The sintered powder is ground with a mortar , washed with deionized water and separated by suction filtration, and the separated sample was dried at 80° C. for 4 hours to obtain yellow carbon nitride. Use the configured chromium nitrate solution to load trivalent chromium ions, first disperse the yellow carbon nitride sample in deionized water and stir, then add the chromium nitrate solution drop by drop to 7.2% of the mass percentage of the carbon nitride sample, and stir at room temperature After a certain period of time, it is dried in an oven and ground to obtain the ...

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Abstract

The invention discloses a solid-gas interface Fenton reaction coupled carbon nitride photocatalytic material and preparation and application thereof. The surface of the photocatalytic material is grafted with hydroxyl groups, and ferrous ions or ferric ions or trivalent chromic ions capable of inducing the Fenton reaction are loaded. During preparation, melamine, alkali chloride and alkali containing alkali metal or alkaline-earth metal elements are adopted as raw materials, treatment is carried out in an electric furnace for a period of time at the temperature of 400 DEG C to 600 DEG C, the product is subjected to washing and suction filtration separation, the yellow carbon nitride photocatalytic material is obtained, and alkali chloride in washing liquid is recycled; the ferrous ions or the ferric ions or the trivalent chromic ions are loaded through a soaking method. According to the method, a catalyst forms a hydroxylated surface through a small amount of alkali, then a small number of ferrous ions or ferric ions or trivalent chromic ions are loaded through the soaking method, the modifying process is simple, easy to operate and low in cost, and the obtained product has excellent gas phase pollutant light degradation capacity.

Description

technical field [0001] The present invention relates to a kind of photocatalytic material and its preparation method and application, particularly relate to a kind of carbon nitride (C 3 N 4 ) Preparation method of photocatalytic material and its application in degrading gaseous pollutants. Background technique [0002] The rapid development of industrial society not only provides great convenience to human life, but also inevitably brings energy and environmental problems. As a new energy and environmental purification technology, photocatalysis has attracted more and more attention. High-efficiency photocatalytic materials are the core of photocatalytic technology, and their research has always attracted much attention. At present, the types of photocatalytic materials have been expanded from traditional inorganic semiconductor materials (such as titanium dioxide, zinc oxide, etc.) to polymer semiconductor materials, metal nanomaterials with plasmon resonance effects, e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01D53/86B01D53/72
CPCB01D53/8668B01D2255/20738B01D2255/20784B01D2255/802B01J27/24B01J35/004
Inventor 欧阳述昕李云祥叶金花
Owner TIANJIN UNIV
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