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Transition metal nano oxidase, preparation method, water treatment device and application

A water treatment device and transition metal technology, applied in the direction of oxidized water/sewage treatment, water/sewage treatment, chemical instruments and methods, etc., can solve the problems of difficult surface water treatment, limited removal rate of water-soluble humus, etc., and achieve the production cost Low, reduced chemical and energy costs, strong acid and alkali resistance and environmental stability effects

Active Publication Date: 2020-03-27
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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  • Transition metal nano oxidase, preparation method, water treatment device and application
  • Transition metal nano oxidase, preparation method, water treatment device and application
  • 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 100mL / min g, heat up at 2°C / min, keep at 600°C for 6h, and cool down naturally;

[0053] (2) Washing away unstable Fe with sulfuric acid with a mass fraction of 0.5%, washing with water until neutral, and then drying to obtain transition metal nano-oxidase.

[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 XPS C 1s in (a) can observe the characteristic peak of -C-O / -C=O structure;

[0057] figure 2 (b) The characteristic peaks of the N-Fe structure can be observed in the N1s image;

[0058] figure 2 The characteristic peaks of FeOO*H and FeO*OH active structures can be observed in the O1s image in (c...

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 100mL / min g, and heat up at 2°C / min, Keep warm at 600°C for 6 hours, then cool down naturally;

[0064] (2) Washing away unstable Fe with sulfuric acid with a mass fraction of 0.5%, washing with water until neutral, and then drying to obtain transition metal nano-oxidase.

[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: iron trichloride in 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) washing the unstable Fe with a mixed acid of nitric acid and phosphoric acid with a mass fraction of 5% to remove the unstable Fe, washing with water until neutral, and then drying to obtain the transition metal nano-oxidase.

[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 transition metal nano oxidase, a preparation method, a water treatment device and 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 one or more of Fe, Co, Cu, Mn, Zn, Ni, Ti, Zr and Mo. The oxidase has a platinum-like catalyst property and directly catalyzes oxygen to oxidize organicmatters. When the transition metal nano oxidase is used for surface water pollution treatment, compared with a traditional water treatment catalyst, hydroxyl free radicals are not generated in the reaction, oxidants such as ozone, hydrogen peroxide and persulfate do not need to be additionally added, except for energy required by aeration and a water pump, additional energy input is not needed, the medicament and energy cost is greatly reduced, and the purpose of efficiently treating natural organic pollutants in the surface water is achieved.

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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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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