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Preparation method and application of heterogeneous catalyst

A heterogeneous catalyst and carbon nitride technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic compounds/hydrides/coordination complex catalysts, etc., can solve pollutant contact, waste, and effective utilization Low-level problems, to achieve the effects of reducing water treatment costs, easy collection, and good magnetic properties

Active Publication Date: 2021-02-19
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the traditional complexation method, the active components of the catalyst are easily wrapped in the internal structure of the catalyst, which cannot be fully combined with H 2 o 2 contact with pollutants
In addition, the excess H during the reaction 2 o 2 will be generated · OH is oxidized to produce superoxide radicals ( · o 2 - ),and · o 2 - In the system, it is finally decomposed into O 2 , resulting in low effective utilization and waste

Method used

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  • Preparation method and application of heterogeneous catalyst
  • Preparation method and application of heterogeneous catalyst
  • Preparation method and application of heterogeneous catalyst

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Embodiment 1

[0047] An embodiment of the heterogeneous catalyst of the present invention, the preparation method of the heterogeneous catalyst described in this embodiment,

[0048] Including the following steps:

[0049] (1) Preparation of carbon nitride nanosheets: urea is roasted, wherein the heating rate of the roasting is 2.5° C. / min, and the roasting starts when the temperature is raised to 500° C., and the roasting time is 2 hours to obtain carbon nitride nanosheets;

[0050] (2) Dopamine hydrochloride, carbon nitride nanosheets prepared in step (1) and Fe source are added in phosphate buffer solution successively, the weight ratio of dopamine hydrochloride, carbon nitride nanosheets and Fe source is: dopamine hydrochloride: nitrogen Carbonized carbon nanosheets: Fe(NO 3 ) 3 =1:3:0.1, stirring to dissolve, ultrasonication, the time of ultrasonication is 5min, and the mixture A is obtained;

[0051] (3) stirring the mixed solution A prepared in step (2) at 25° C. for 5 h to obtain...

Embodiment 2

[0056] An embodiment of the heterogeneous catalyst of the present invention, the preparation method of the heterogeneous catalyst described in this embodiment comprises the following steps:

[0057] (1) Preparation of carbon nitride nanosheets: urea is roasted, wherein the heating rate of the roasting is 2.5° C. / min, the temperature is raised to 550° C. to start roasting, and the roasting time is 4 hours to obtain carbon nitride nanosheets;

[0058] (2) Dopamine hydrochloride, carbon nitride nanosheets prepared in step (1) and Fe source are added in phosphate buffer solution successively, the weight ratio of dopamine hydrochloride, carbon nitride nanosheets and Fe source is: dopamine hydrochloride: nitrogen Carbon nanosheets: FeCl 3 = 1:1:0.1, stir to dissolve, sonicate, the time of sonication is 10min, to obtain the mixed solution A;

[0059] (3) stirring the mixed liquid A prepared in step (2) at 25° C. for 10 h to obtain a solid product B;

[0060] (4) The solid product B...

Embodiment 3

[0064] An embodiment of the heterogeneous catalyst of the present invention, the preparation method of the heterogeneous catalyst described in this embodiment,

[0065] Including the following steps:

[0066] (1) Preparation of carbon nitride nanosheets: urea is roasted, wherein the heating rate of the roasting is 10° C. / min, and the roasting starts when the temperature is raised to 600° C., and the roasting time is 4 hours to obtain carbon nitride nanosheets;

[0067] (2) Dopamine hydrochloride, carbon nitride nanosheets prepared in step (1) and Fe source are added in phosphate buffer solution successively, the weight ratio of dopamine hydrochloride, carbon nitride nanosheets and Fe source is: dopamine hydrochloride: nitrogen Carbonized carbon nanosheets: Fe 2 (SO 4 ) 3 =1:2:0.5, stirring to dissolve, ultrasonication, the time of ultrasonication is 10min, and the mixture A is obtained;

[0068] (3) stirring the mixed liquid A prepared in step (2) at 25° C. for 15 h to obt...

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Abstract

The invention discloses a preparation method of a heterogeneous catalyst, and relates to the technical field of catalysts. The preparation method of the heterogeneous catalyst comprises the steps of (1) preparing a carbon nitride nanosheet, specifically, roasting urea to obtain the carbon nitride nanosheet; (2) sequentially adding dopamine hydrochloride, the carbon nitride nanosheet prepared in the step (1) and an Fe source into a phosphoric acid buffer solution, stirring for dissolving, and carrying out ultrasonic treatment to obtain a mixed solution A; (3) stirring the mixed solution A prepared in the step (2) at the temperature of 20-25 DEG C for more than 5 hours to obtain a solid product B; (4) washing and drying the solid product B prepared in the step (3) to obtain a solid product C; and (5) roasting the solid product C prepared in the step (4) under inert gas, and cooling to obtain the heterogeneous catalyst.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a preparation method and application of a heterogeneous catalyst. Background technique [0002] With the rapid development of petrochemical, pesticide, pharmaceutical and other industries, different types of production wastewater and domestic sewage have not yet reached the standard, and they are directly discharged into surface water bodies, resulting in serious water pollution, exacerbating the contradiction of water resource shortage, and seriously affecting to the safety of drinking water and the health of residents. In the existing advanced oxidation water treatment technology, the homogeneous Fenton reaction (Fe 2+ +H 2 o 2 ) because Fe in the reaction 2+ can rapidly activate H 2 o 2 , producing strong oxidative · OH is widely used in the degradation of refractory organic pollutants in water to improve the biodegradability of wastewater. However, in practical engi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/06C02F1/72C02F101/38C02F101/30
CPCB01J31/069C02F1/725C02F2305/023C02F2305/026C02F2101/38C02F2101/30B01J35/33
Inventor 胡春吕来曹文锐韩沐恩
Owner GUANGZHOU UNIVERSITY
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