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A kind of transition metal nano-oxidase, preparation method, water treatment device and application

A transition metal and oxidase technology, applied in the direction of oxidized water/sewage treatment, water/sewage treatment, chemical instruments and methods, etc., can solve the problems of limited removal rate of water-soluble humus, difficult surface water treatment, etc., and achieve good catalytic effect , improve responsiveness, and overcome technical difficulties

Active Publication Date: 2021-09-24
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing water treatment technology has a limited removal rate of water-soluble humus, and the existing nano-oxidase and most oxidation technologies are used in acidic conditions, which are difficult to be directly used in surface water treatment

Method used

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  • A kind of transition metal nano-oxidase, preparation method, water treatment device and application
  • A kind of transition metal nano-oxidase, preparation method, water treatment device and application
  • A kind of transition metal nano-oxidase, preparation method, water treatment device and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Preparation:

[0052] (1) Heat the Prussian blue in a tube furnace under nitrogen protection, control the gas flow rate / precursor mass to 100 mL / min g, heat up at 2°C / min, keep at 600°C for 6 hours, and cool down naturally;

[0053] (2) The unstable Fe was washed away with sulfuric acid with a mass fraction of 0.5%, and then washed with water until neutral, and then dried to obtain transition metal nanooxidase.

[0054] Carry out magnetic separation to above-mentioned transition metal nanooxidase, the result is as follows figure 1 shown.

[0055] Carry out XPS characterization to above-mentioned transition metal nanooxidase, the result is as follows figure 2 shown;

[0056] figure 2 (a) The characteristic peaks of the -C-O / -C=O structure can be observed in XPS C 1s;

[0057] figure 2 (b) The characteristic peaks of the N-Fe structure can be observed in the N 1s image;

[0058] figure 2 The characteristic peaks of FeOO*H and FeO*OH active structures can be ob...

Embodiment 2

[0063] (1) Heat Prussian blue in a tube furnace, use a mixture of oxygen and nitrogen with an oxygen content of 0.02% as a protective gas, control the gas flow rate / precursor mass to 100 mL / min g, and heat up at 2°C / min , keep warm at 600°C for 6 hours, and cool down naturally;

[0064] (2) The unstable Fe was washed away with sulfuric acid with a mass fraction of 0.5%, and then washed with water until neutral, and then dried to obtain transition metal nanooxidase.

[0065] The above-mentioned Prussian blue precursor can be replaced by a metal organic framework material containing one or more elements of Fe, Co, Cu, Mn, Zn, Ni, Ti, Zr, and Mo.

Embodiment 3

[0067] Preparation:

[0068] (1) Mix melamine:ferric chloride at a mass ratio of 2:1, dissolve in methanol and evaporate to dryness to obtain a melamine precursor;

[0069] (2) Heat the precursor in a tube furnace, under the protection of nitrogen, control the gas flow rate / precursor mass to 200mL / min g, heat up at 5°C / min, keep at 800°C for 3h, and cool down naturally;

[0070] (3) The unstable Fe was washed with mixed acid of nitric acid and phosphoric acid with a mass fraction of 5%, and then washed with water until neutral, and then dried to obtain transition metal nanooxidase.

[0071] The above ferric chloride can be replaced by any one or several soluble metal salts of Co, Cu, Mn, Zn, Ni, Ti, Zr, Mo, so as to obtain the nano-oxidase.

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Abstract

The invention discloses a transition metal nano-oxidase, a preparation method, a water treatment device and an application, and relates to the field of nano-catalysts. The active site of the transition metal nano-oxidase is expressed as M-N-C, and M is Fe, Co , one or more of Cu, Mn, Zn, Ni, Ti, Zr, Mo; the oxidase has platinum-like catalyst properties and directly catalyzes the oxidation of organic matter by oxygen. In this application, when the transition metal nano-oxidase is used for surface water pollution treatment, compared with traditional water treatment catalysts, it does not generate hydroxyl radicals in the reaction, and does not need to add additional oxidants such as ozone, hydrogen peroxide and persulfate , In addition to the energy required for aeration and water pumps, no additional energy input is required, which greatly reduces the cost of chemicals and energy, and achieves the purpose of efficiently treating natural organic pollutants in surface water.

Description

technical field [0001] The invention relates to the field of nano catalysts, in particular to a transition metal nano oxidase, a preparation method, a water treatment device and application. Background technique [0002] Nanozymes are a class of nanocatalysts with high catalytic activity. Compared with natural enzymes, nanozymes have higher environmental tolerance, stability, and lower preparation, storage and use costs; compared with traditional catalysts, nanozymes have more High catalytic activity, and can be catalyzed under mild conditions; at the same time, nanozymes also have the advantages of easy modification, easy loading and easy recovery. At present, nano-peroxidase and nano-oxidase are more researched, and nano-oxidase can use naturally occurring oxygen as a substrate to catalyze oxidation, so it has attracted much attention in various fields. [0003] Natural organic pollutants in surface water are a class of pollutants that widely exist in the field of water t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/72B01J23/745B82Y30/00B82Y40/00
CPCB01J23/745B82Y30/00B82Y40/00C02F1/725
Inventor 杨涵焜俞文正
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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