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Molybdenum-doped graphite-phase carbon nitride catalyst as well as preparation method and application thereof

A graphitic carbon nitride and catalyst technology, applied in physical/chemical process catalysts, carbon-based compound preparation, chemical instruments and methods, etc., can solve the problems of high photogenerated electron recombination rate, low quantum efficiency, small specific surface area, etc. Achieve the effect of increasing specific surface area, large specific surface area and improving catalytic activity

Active Publication Date: 2019-10-08
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current graphitic carbon nitride has problems such as small specific surface area, high recombination rate of photogenerated electrons, large band gap and low quantum efficiency, which limit its application.

Method used

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  • Molybdenum-doped graphite-phase carbon nitride catalyst as well as preparation method and application thereof
  • Molybdenum-doped graphite-phase carbon nitride catalyst as well as preparation method and application thereof
  • Molybdenum-doped graphite-phase carbon nitride catalyst as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0032] Embodiment 1 molybdenum-doped graphite phase carbon nitride catalyst

[0033] (1) Preparation method

[0034] Dissolve 2.52g melamine in 100ml deionized water, stir, heat to dissolve, add 20μL glyoxylic acid and 0.1236g ammonium molybdate, stir for 0.5-5h at 50-100°C, put the resulting mixture in an oven at 100°C Heating and drying under low temperature, after grinding, put it in an alumina crucible, in a tube furnace, under the protection of nitrogen, raise the temperature to 550°C at a rate of 5°C / min, carry out calcination treatment and keep it for 4h, and naturally cool to get the target Product molybdenum doped graphitic carbon nitride g-C 3 N 4 Catalyst (MCN1).

[0035] (2) Detection

[0036] image 3 For the XRD test figure of the MCN1 that embodiment 2 prepares, by image 3 It can be seen that the diffraction peak of the sample at 27° disappeared and a new diffraction peak appeared at 28°, indicating that the addition of molybdenum caused the g-C 3 N 4 t...

Embodiment 2

[0039] Application of embodiment 2 molybdenum-doped graphite phase carbon nitride catalyst in degrading isopropanol

[0040] The catalysts prepared in Comparative Example and Example 1 were tested for the performance of photothermal catalyst materials.

[0041] The test process is: use a 300W xenon lamp as the light source, adjust the photocurrent to 20A, adjust the light intensity center to irradiate the sample surface, fix the position, weigh 0.1g of MCN0 and MCN1 respectively and put them in 4cm 2 In the glass tank, put the glass tank containing the photocatalyst into a 224ml reactor containing an atmospheric pressure air, and finally inject 5ul isopropanol liquid into the reactor, start timing after 20 minutes of light, and take samples every 20 minutes 1mL isopropanol, carry out photothermal catalytic ability test, record the peak area of ​​isopropanol, after recording 6 times respectively (light two hours), obtain the rate of degrading isopropanol per minute through calc...

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Abstract

The invention discloses a molybdenum-doped graphite-phase carbon nitride catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: by taking melamine as a precursor, adding glyoxylic acid and ammonium molybdate, and carrying out roasting in a nitrogen environment, so as to obtain a product, namely the molybdenum-doped graphite-phase carbon nitride catalyst. The catalyst disclosed by the invention has a large specific surface area and a high porosity. Due to a porous structure, the energy conversion efficiency can be effectively improved, the specific surface area of a semiconductor can be increased, then more surface active sites can be provided, and the photo-thermal catalysis activity can be improved. Meanwhile, a molybdenum doping structure is established to effectively separate photoproduction electrons from holes, the recombination rate can be reduced, and the photo-thermal catalysis activity can be improved. The methodhas the advantages of being low in cost and convenient in operation. Harmful substances such as isopropanol can be degraded under radiation of visible light, and significant practical application values can be made in environment cleaning and clean energy production.

Description

technical field [0001] The invention belongs to the technical field of photothermal catalytic materials, and in particular relates to a molybdenum-doped graphite-phase carbon nitride catalyst and a preparation method and application thereof. Background technique [0002] With the development of human society, the problem of environmental pollution is becoming more and more serious. As a sustainable and environmentally friendly technology, photothermal catalysis technology can use sunlight to degrade organic pollutants and has the characteristics of no secondary pollution and recyclable regeneration. Photothermal catalytic materials are the main carrier for the realization of photothermal catalytic technology. An efficient photothermal catalyst should not only be safe, non-toxic, simple to prepare, and low in cost, but also have the characteristics of stable chemical properties and high visible light responsivity. However, the current graphitic carbon nitride has problems suc...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/10C07C45/39C07C49/08
CPCB01J27/24C07C45/39B01J35/39B01J35/61C07C49/08Y02P20/10
Inventor 范晓星李晓菲孙钰涵陆丽莲
Owner LIAONING UNIVERSITY
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