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Preparation method of carbon and oxygen co-doped graphite phase carbon nitride, and application of carbon and oxygen co-doped graphite phase carbon nitride in catalytic activation of persulfate to degrade pollutants in water

A graphite phase carbon nitride, persulfate technology, applied in water pollutants, oxidized water/sewage treatment, physical/chemical process catalysts, etc., can solve the problems of high cost of physical methods, poor reusability, secondary pollution, etc. , to achieve the effect of significant activation effect, remarkable effect, and improved redox ability

Active Publication Date: 2019-01-22
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the characteristics of high cost and high energy consumption of physical methods and the chemical method of transitio

Method used

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  • Preparation method of carbon and oxygen co-doped graphite phase carbon nitride, and application of carbon and oxygen co-doped graphite phase carbon nitride in catalytic activation of persulfate to degrade pollutants in water
  • Preparation method of carbon and oxygen co-doped graphite phase carbon nitride, and application of carbon and oxygen co-doped graphite phase carbon nitride in catalytic activation of persulfate to degrade pollutants in water
  • Preparation method of carbon and oxygen co-doped graphite phase carbon nitride, and application of carbon and oxygen co-doped graphite phase carbon nitride in catalytic activation of persulfate to degrade pollutants in water

Examples

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Effect test

Embodiment 1

[0037] Example 1: Catalyst CNS 1.0 Synthesis

[0038] Mix 20g urea with 1g succinic acid (C 4 h 6 o 4 ) were mixed evenly and put into a muffle furnace for high-temperature calcination, the heating rate was 2°C / min, the temperature was kept at 550°C for 4 hours, and the catalyst CNS was fully ground after natural cooling.

Embodiment 2

[0039] Example 2: Catalyst CNS 2.0 Synthesis

[0040] 20g urea and 2g succinic acid (C 4 h 6 o 4 ) were mixed evenly and placed in a muffle furnace for high-temperature calcination, the heating rate was 2°C / min, the temperature was kept at 550°C for 4 hours, and the catalyst was fully ground after natural cooling to obtain the catalyst CNS 2.0 .

Embodiment 3

[0041] Example 3: Catalyst CNS 0.5 Synthesis

[0042] 20g urea and 0.5g succinic acid (C 4 h 6 o 4) were mixed evenly and placed in a muffle furnace for high-temperature calcination, the heating rate was 2°C / min, and the temperature was kept at 550°C for 4 hours. After natural cooling, the catalyst CNS was fully ground. 0.5 .

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Abstract

The invention belongs to the technical field of wastewater treatment, and discloses a preparation method of carbon and oxygen co-doped graphite phase carbon nitride, and an application of the carbon and oxygen co-doped graphite phase carbon nitride in the catalytic activation of persulfate to degrade pollutants in water. The carbon and oxygen co-doped graphite phase carbon nitride is prepared by high-temperature calcining of succinic acid and urea, is used as a catalyst to activate the persulfate to effectively degrade dyes, endocrine interferents, pesticides and other organic pollutants, hasa very good removal effect at a pH value of 3.0-9.0, and has an excellent stability, and a result of detection shows that active substances in the reaction system are hydroxy free radicals (<.>OH) andsulfate radicals (SO<4><.->) and singlet oxygen (<1>O2). The carbon and oxygen co-doped graphite phase carbon nitride has the advantages of no secondary pollution, convenience in separation from water and recycling, and broad application prospect when used for activating the persulfate to degrade the organic pollutants in water as a nonmetal catalyst.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, in particular to the preparation of carbon and oxygen co-doped graphite phase carbon nitride and its application in catalytically activating persulfate to degrade pollutants in water. Background technique [0002] Traditional methods for treating pollutants in water are difficult to completely degrade organic pollutants in water due to their limited technical means, such as physical methods, chemical oxidation methods, chemical electrolysis methods, physical chemical methods, and biological methods. Therefore, advanced oxidation technology It was first proposed in 1987. Advanced Oxidation Technology (AOPs) is defined as the generation of a large number of strong oxidizing free radicals, using highly active free radicals to attack and react with macromolecular organic matter, thereby destroying the molecular structure of oil agents to achieve the purpose of oxidizing and removing orga...

Claims

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Application Information

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IPC IPC(8): B01J27/24C02F1/72C02F101/30
CPCB01J27/24C02F1/725C02F2101/30
Inventor 高耀文胡春朱乐邢学辞周丽
Owner GUANGZHOU UNIVERSITY
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