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n-g-c 3 no 4 Preparation method and application of visible light catalytic material

A n-g-c3n4, catalytic material technology, applied in the field of environment and chemistry, can solve the problems that limit practical application

Active Publication Date: 2020-10-27
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, conventional g-C 3 N 4 It can only absorb visible light below 450nm, which greatly limits g-C 3 N 4 practical application of

Method used

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  • n-g-c <sub>3</sub> no <sub>4</sub> Preparation method and application of visible light catalytic material

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Embodiment

[0029] This embodiment provides a N-g-C 3 N 4 The preparation method of (nitrogen-rich carbon nitride) includes the following steps:

[0030] (1) The nitrogen-rich precursor and melamine are mixed and thoroughly ground to obtain a mixture, wherein the mass ratio of the nitrogen-rich precursor and melamine can be 0.05:3 to 0.5:3. The nitrogen-rich precursor can be 3-amino-1,2,4triazole or 5amino-1H-4azole. Preferably, the mass ratio of the nitrogen-rich precursor and melamine is 0.1:3 to 0.3:3.

[0031] (2) Put the uniformly ground mixture into a muffle furnace, raise the temperature to 500°C and calcine at a constant temperature for two hours, after natural cooling, grind the calcined product to obtain N-g-C 3 N 4 . The heating rate is 5-10°C / min.

[0032] Specifically, in this embodiment, the mass ratio of the nitrogen-rich precursor 3-amino-1,2,4triazole and melamine is 0.2:3. figure 1 N-g-C obtained by the method of this embodiment 3 N 4 And traditional g-C 3 N 4 UV-vis diagram:...

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Abstract

The invention provides a preparation method and applications of an N-g-C3N4 visible light catalytic material. The preparation method comprises the following steps: (1) mixing a nitrogen-rich precursorand melamine according to a mass ratio of 0.05: 3-0.5: 3, and fully and uniformly grinding after mixing to obtain a mixture; and (2) putting the uniformly ground mixture into a muffle furnace, heating to 500 DEG C, calcining at a constant temperature for 2 hours, naturally cooling, and grinding an obtained calcined product to obtain N-g-C3N4. The N-g-C3N4 obtained by the method disclosed by the invention has relatively high catalytic efficiency when being used for degrading dye wastewater and antibiotic wastewater, and the catalytic efficiency is improved by 3-4 times compared with that of traditional g-C3N4.

Description

Technical field [0001] The present invention relates to the technical field of environment and chemistry, in particular to a kind of 3 N 4 Preparation method and application of visible light catalytic material. Background technique [0002] Organic dye pollution is one of the important sources of water environment pollution. With the rapid development of world industry, especially in developing countries, the annual output of organic dyes is 7×10 5 t, is widely used in papermaking, leather processing, textile dyeing, cosmetics, and pharmaceutical manufacturing industries. my country is a large country in the production and use of antibiotics. At present, many antibiotics such as amoxicillin and cefotaxime sodium can be detected in environmental water bodies. The current methods to solve the problems of organic pollution such as dyes and antibiotics in environmental waters include biodegradation, physical and chemical adsorption, advanced oxidation and visible light catalysis. Si...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J37/08A01N59/00A01P1/00C02F1/30C02F101/30
CPCA01N59/00B01J27/24B01J35/004B01J37/082C02F1/30C02F2101/308C02F2305/10
Inventor 王锦高博儒杨帆窦蒙蒙李树铭
Owner BEIJING JIAOTONG UNIV