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Monatomic catalytic material for removing refractory organic pollutants and preparation method of monatomic catalytic material

A technology of organic pollutants and catalytic materials, applied in the field of single-atom catalytic materials and their preparation, can solve the problems of narrow optimum pH range, easy to produce a large amount of iron sludge, low rate constant, etc., and achieve short preparation cycle and good repeatability Ease of use and preparation method

Pending Publication Date: 2021-08-10
山西铭睿恒信环保工程有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional homogeneous Fenton method still has a lot of defects including: (1) a large amount of H 2 o 2 ; (2) The optimum pH range is narrow (pH≤3); (3) It is easy to produce a large amount of iron sludge
However, the rate constant for the reduction of Fe(III) by H2O2 is low (0.001-0.01M- 1 s- 1 ) making it the rate-limiting step of the reaction

Method used

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  • Monatomic catalytic material for removing refractory organic pollutants and preparation method of monatomic catalytic material
  • Monatomic catalytic material for removing refractory organic pollutants and preparation method of monatomic catalytic material
  • Monatomic catalytic material for removing refractory organic pollutants and preparation method of monatomic catalytic material

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preparation example Construction

[0037] The invention provides a method for preparing a single-atom catalytic material for the removal of refractory organic pollutants, comprising the following steps:

[0038]S1: put a certain quality of C 6 o 6 and CH 4 N 2 After O is ground and mixed for a certain period of time, it is placed in a quartz crucible and heated at a low temperature to form a eutectic mixture.

[0039] Further, in an optional embodiment of the present invention, C 6 o 6 and CH 4 N 2 The mass ratio of O is 1:0.5-5; preferably, C 6 o 6 and CH 4 N 2 The mass ratio of O is 1:0.5-2; preferably, C 6 o 6 and CH 4 N 2 The mass to mass ratio of O is 1:1.

[0040] Further, in an optional embodiment of the present invention, the temperature of low-temperature heating is 60-150°C.

[0041] S2: After the eutectic mixture is cooled to room temperature, it is further ground and mixed with a certain quality of chloride salt, and the mixture is heated under the protection of nitrogen atmosphere. ...

Embodiment 1

[0059] A method for preparing a single-atom catalytic material for the removal of refractory organic pollutants, comprising the following steps:

[0060] 2.5gC 6 o 6 with equal mass of CH 4 N 2 O mix well and grind for 10 minutes. The resulting mixture was placed in a quartz crucible and heated at 90 °C for 1 h to form a eutectic mixture. After the product is cooled to room temperature, it is further mixed with 10.0g ZnCl 2 Mix and grind for 15 minutes. Further, the eutectic mixture was heated to 600° C. under a nitrogen atmosphere at a heating rate of 2.5° C. / min for 1 hour. Thereafter, the resulting product was rinsed with deionized water to remove residual ZnCl 2 , and placed in a vacuum oven for drying. 0.2mol / LFeCl 3 ·6H 2 The O solution was mixed with 0.2 g of N-rich carbon material to obtain a suspension, and then the water in the mixture was removed by a rotary evaporator, and the traditional H 2 The reduction method further uniformly disperses Fe atoms on t...

Embodiment 2

[0062] A method for preparing a single-atom catalytic material for the removal of refractory organic pollutants, comprising the following steps:

[0063] 2.5gC 6 o 6 with equal mass of CH 4 N 2 O mix well and grind for 10 minutes. The resulting mixture was placed in a quartz crucible and heated at 90 °C for 1 h to form a eutectic mixture. After the product is cooled to room temperature, it is further mixed with 10.0g ZnCl 2 Mix and grind for 15 minutes. Further, the eutectic mixture was heated to 600° C. under a nitrogen atmosphere at a heating rate of 2.5° C. / min for 1 hour. Thereafter, the resulting product was rinsed with deionized water to remove residual ZnCl 2 , and placed in a vacuum oven for drying. 0.2mol / LFeCl 3 ·6H 2 The O solution was mixed with 0.2 g of N-rich carbon material to obtain a suspension, and then the water in the mixture was removed by a rotary evaporator, and the traditional H 2 The reduction method further uniformly disperses Fe atoms on t...

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Abstract

The invention provides a monatomic catalytic material for removing refractory organic pollutants and a preparation method of the monatomic catalytic material, and belongs to the field of environmental pollution treatment. The preparation method comprises the following steps: grinding and mixing a certain mass of hexachlorocyclohexane octahydrate and urea, and heating at low temperature to form a eutectic mixture; cooling the eutectic mixture to room temperature, performing grinding and mixing with a certain mass of chlorate, and performing heating to obtain an N-rich carbon carrier; mixing the dissolved iron salt with the N-rich carbon carrier to obtain a suspension, and further uniformly dispersing Fe atoms on the N-rich carbon carrier by adopting a traditional H2 reduction method. Fe species in the catalytic material exist in a monatomic form, and monatomic Fe is loaded on the surface of a carrier through metal-carrier interaction. The material has excellent organic pollutant degradation capability and good reusability in a larger pH range. The material is low in preparation cost, simple in preparation method, low in energy consumption and easy for large-scale preparation, and has a good application prospect in the field of pollution control.

Description

technical field [0001] The invention relates to the field of environmental pollution control, in particular to a single-atom catalytic material for removing refractory organic pollutants and a preparation method thereof. Background technique [0002] Most of the wastewater generated from pesticide, printing and dyeing, chemical, pharmaceutical and landfill sites is refractory organic wastewater, which usually contains high concentrations of organic pollutants that are biologically toxic and highly stable. Biochemical treatment technology is currently the dominant process because of its good economy and thorough removal of pollutants. However, the effluent after biochemical treatment still contains a large amount of refractory organic matter. Therefore, it is necessary to further adopt advanced treatment technology for tail water to meet the discharge requirements of industry standards. Traditional tail water advanced treatment technologies include adsorption method, coagula...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J37/18C02F1/72C02F101/30
CPCB01J27/24B01J37/18C02F1/725C02F1/722C02F2101/30C02F2305/026B01J35/397
Inventor 岳竞慧贾高彬韩应张里萌王建辉郭晓杰张岩
Owner 山西铭睿恒信环保工程有限公司
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