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Preparation method of nickel foam supported bimetal MOF base ozone catalyst, production thereof and application

A double metal oxide, nickel foam technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, etc., can solve the problem of low catalytic ozone decomposition rate and small specific surface area. , the difficulty of separation and recovery of powder catalysts, etc., to achieve the effect of easy operation, improve mineralization rate, and solve the problem of separation and recovery

Active Publication Date: 2019-10-08
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of conventional ozone catalysts such as small specific surface area, low catalytic ozone decomposition rate, and difficulty in separation and recovery of powder catalysts, the purpose of the present invention is to provide a method for preparing a foam nickel-supported bimetallic MOF-based ozone catalyst

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A method for preparing a foamed nickel-supported bimetallic MOF-based ozone catalyst. The metal-organic framework compound ZIF-67 is used as a template, and the foamed nickel is used as a carrier. The supported porous Mn / Co bis Metal MOF-based ozone catalysts, the bimetallic Mn / Co oxides were grown in situ on the foamed nickel substrate by the hydrothermal method, and then ZIF-67 was used to modify the supported bimetallic oxides by the impregnation method, thereby preparing the foam Nickel-supported bimetallic MOF-based ozone catalyst, as follows:

[0030] (1) First, under magnetic stirring, put 50% manganese nitrate aqueous solution and cobalt nitrate hexahydrate in a beaker with a molar ratio of 6.66:1, mix well and transfer to a polytetrafluoroethylene hydrothermal kettle, then press The mass ratio of nickel foam to manganese nitrate and cobalt nitrate oxide is 10:1. Immerse the pretreated nickel foam in the mixed solution, keep it at 150°C for 4 hours, cool it down...

Embodiment 2

[0034] A kind of preparation method of nickel foam supported bimetallic MOF base ozone catalyst, according to the following steps:

[0035] (1) First, under magnetic stirring, put 50% manganese nitrate aqueous solution and cobalt nitrate hexahydrate in a beaker at a molar ratio of 10:1, mix well and transfer to a polytetrafluoroethylene hydrothermal kettle, then press The mass ratio of nickel foam to manganese nitrate and cobalt nitrate oxide is 6.8:1. Immerse the pretreated nickel foam in the mixed solution, keep it at 150°C for 6 hours, cool it down to room temperature naturally, take out the precipitate, wash it, and dry it; And calcined at 350°C for 4 hours to obtain the foamed nickel-supported Mn / Co oxide composite material;

[0036](2) Use absolute ethanol and water as a mixed solvent to prepare a 1.11mol / L 2-methylimidazole solution. After ultrasonic treatment, add triethylamine according to the molar ratio of triethylamine to double metal oxide is 8:1 Solution, after ...

Embodiment 3

[0039] A kind of preparation method of nickel foam supported bimetallic MOF base ozone catalyst, according to the following steps:

[0040] (1) First, under magnetic stirring, put 50% manganese nitrate aqueous solution and cobalt nitrate hexahydrate in a beaker with a molar ratio of 8.88:1, mix well and transfer to a polytetrafluoroethylene hydrothermal kettle, then press The mass ratio of nickel foam to manganese nitrate and cobalt nitrate oxide is 10:1. Immerse the pretreated nickel foam in the mixed solution, keep it at 150°C for 4 hours, cool it down to room temperature naturally, take out the precipitate, wash it, and dry it; And calcined at 350°C for 4 hours to obtain the foamed nickel-supported Mn / Co oxide composite material;

[0041] (2) Use absolute ethanol and water as a mixed solvent to prepare a 1.11mol / L 2-methylimidazole solution. After ultrasonic treatment, add triethylamine according to the molar ratio of triethylamine to double metal oxide is 10:1 Solution, a...

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Abstract

The invention relates to a preparation method of nickel foam supported bimetal MOF base ozone catalyst, a production thereof and application. The preparation method comprises the steps that a metal organic framework ZIF-67 is taken as a template, nickel foam serves as a carrier, an in-situ hydrothermal-impregnation synthesis method is adopted to prepare a supported porous Mn / Co bimetal MOF base ozone catalyst, bimetal Mn / Co oxide in situ grows on a nickel foam base through a hydrothermal method, the supported bimetal oxide is modified by ZIF-67 through a impregnation method, and thus the nickel foam supported bimetal MOF base ozone catalyst is prepared. According to the preparation method, the crystal size and morphology of the catalyst are regulated effectively and accurately, evenly-distributing of active sites is facilitated, the decomposition rate on ozone and the mineralization rate on organic matter of the nickel foam supported bimetal MOF base ozone catalyst are greatly improved, the problems of separating and recycling of suspended catalysts can be effectively solved, the operation cost of water treatment is lowered, and large application prospects are achieved.

Description

technical field [0001] The invention relates to a preparation method of a nickel foam-supported bimetallic MOF-based ozone catalyst and its product and application, which can effectively promote the decomposition rate of ozone by Mn / Co-MOF-based composite materials, strengthen the removal of organic pollutants in water, and at the same time It can also effectively avoid problems such as catalyst loss and difficult recovery, and can be used in the field of enhanced treatment of water pollution. Background technique [0002] Heterogeneous catalytic ozonation technology is an advanced oxidation technology that uses the activity of various heterogeneous catalysts to catalyze the decomposition of ozone to generate hydroxyl radicals. At present, heterogeneous catalytic ozonation catalysts mainly fall into three categories: noble metal series, copper series and rare earth series. The ability to catalyze ozone oxidation mainly depends on the catalyst and its surface properties, cur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/32C02F1/78C02F101/30
CPCB01J31/32C02F1/78C02F1/725C02F2305/02C02F2101/30
Inventor 童琴赵昆峰王泽轩
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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