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Preparation method of water treatment advanced oxidation catalyst

An advanced oxidation and catalyst technology, applied in the field of water treatment, can solve the problems of high preparation cost, low activity, short service life, etc., and achieve the effect of improving service life, improving catalytic activity and prolonging service life

Inactive Publication Date: 2018-10-09
BEIJING NEWBIOLINK TECH DEV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] The present invention aims to solve the disadvantages of high preparation cost, low activity and short service life of existing advanced oxidation catalysts for water treatment, and provides a novel preparation method for advanced oxidation catalysts for water treatment, which effectively solves the problem of existing catalysts in Defects in the preparation and application process

Method used

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  • Preparation method of water treatment advanced oxidation catalyst

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preparation example Construction

[0022] The invention provides a method for preparing an advanced oxidation catalyst for water treatment, which mainly includes the following four steps:

[0023] (1) In the first step, the original carbon material is subjected to high-temperature heat treatment at 2000-3000 ° C for 6-24 h before being used;

[0024] (2) In the second step, the carbon material treated in the first step is placed in a chitosan solution with a mass concentration of 0.1%~2%, wherein the mass ratio of carbon material to chitosan is 0.1~5:1, and stirred 0.5~2 h to mix evenly;

[0025] (3) The third step is to prepare composite nano-metal particles by chemical reduction method, wherein the reducing agent used in the chemical reduction method is one of sodium borohydride or hydrazine hydrate; the solvent is one of water or ethylene glycol; the solvent One of cetyltrimethylammonium bromide or polyvinylpyrrolidone is dissolved in the medium, and its mass concentration is 0.1-2%; the reaction temperatur...

Embodiment 1

[0030] The first step: the amorphous carbon material is heat-treated at 2800° C. for 12 hours under the condition of nitrogen protection.

[0031] Step 2: Weigh 100 mg of the above carbon material and add 100 mL of chitosan solution with a mass concentration of 0.5%, stir and mix for 1 hour, wash and dry. The dried solid was placed back in a beaker filled with 100 mL of water for use.

[0032] The third step: 72mg Fe(NO 3 ) 3 9H 2 O, 23mg Mn(NO 3 ) 2 4H 2 O, 19mg Cu(NO 3 ) 2 ·3H 2 O and 0.1g of cetyltrimethylammonium bromide were dissolved in 100 mL of water, and after mixing evenly, 1 mL of -1 sodium borohydride solution, reacted for 30min.

[0033] The fourth step: Measure 10 mL of the reacted solution in the third step and add it to the beaker in the second step, stir and react for 60 minutes, wash and filter to obtain the product catalyst.

Embodiment 2

[0035] The first step: a certain amount of bamboo carbon material is heat-treated at 2500° C. for 15 hours under the condition of nitrogen protection.

[0036] Step 2: Weigh 100 mg of the above carbon material and add 100 mL of chitosan solution with a mass concentration of 1%, stir and mix for 1.5 h, wash and dry. The dried solid was placed back in a beaker filled with 100 mL of water for use.

[0037] The third step: 108mg Fe(NO 3 ) 3 9H 2 O, 23mg Mn(NO 3 ) 2 4H 2 O and 0.2g of cetyltrimethylammonium bromide were dissolved in 100 mL of ethylene glycol, and after mixing evenly, 1 mL of -1 sodium borohydride solution, reacted for 45min.

[0038] The fourth step: Measure 10 mL of the reacted solution in the third step and add it to the beaker in the second step, stir and react for 120 minutes, wash and filter to obtain the product catalyst.

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Abstract

The invention relates to the field of wastewater treatment and discloses a preparation method of a loaded water treatment advanced oxidation catalyst. The preparation method mainly includes followingfour steps: step 1, subjecting an original carbon material to high-temperature thermal treatment to improve structural regularity thereof so as to improve integral strength and running stability of acatalyst; step 2, putting the carbon material after going through high-temperature thermal treatment into a chitosan solution with certain concentration for surface modification; step 3, applying a chemical reducing method to prepare composite metal nanoparticles; step 4, well mixing the carbon material with the composite metal nanoparticles to obtain the novel water treatment advanced oxidation catalyst, wherein the carbon material which is electronegative on the surface and the metal nanoparticles are closely combined through high molecular chitosan which is electropositive on the surface.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to a preparation process of a loaded water treatment advanced oxidation catalyst. Background technique [0002] The chemical oxygen demand (COD) value is an important indicator for judging the water quality of water bodies. Because most of the wastewater has a high COD value and is difficult to remove, how to reduce the COD index of wastewater has become one of the main research topics for many enterprises and scientific research institutions. . At present, the best way to reduce COD is the advanced oxidation method, and the advanced oxidation method using catalysts has become a mainstream advanced oxidation treatment process for wastewater due to its convenient operation, low investment and operation cost, and better wastewater treatment effect. The catalyst is the key to the whole process. [0003] At present, the preparation method of commercially available catalysts mainly ado...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01J23/745B01J37/08B01J37/16C02F1/72
CPCB01J23/745B01J23/8892B01J37/084B01J37/16C02F1/725
Inventor 张杰刘鼎刘培娟李君占
Owner BEIJING NEWBIOLINK TECH DEV
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