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Preparation method and application of a nanoscale ozone oxidation catalyst

An ozone oxidation, nano-scale technology, applied in the direction of physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problem of low content of active components and easy loss of active components , low catalytic activity and other issues, to achieve the effect of good adsorption performance, good inert components and high catalytic activity

Active Publication Date: 2020-05-22
浙江巨能环境工程有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The above-mentioned ozone oxidation catalysts are all prepared by loading active components on the carrier, and the catalyst has a certain catalytic activity, but with an inert substance as the carrier material, the content of active components is small, and the catalytic activity is low; and the active components can only be loaded On the surface of the carrier, the active components are easy to lose during long-term use, resulting in catalyst deactivation

Method used

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  • Preparation method and application of a nanoscale ozone oxidation catalyst

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Effect test

Embodiment 1

[0031] (1) The concentrated hydrochloric acid of 5ml 12mol / L is added dropwise in 840ml dehydrated alcohol, after stirring, add 17.5g tin sulfate, obtain tin sulfate solution after dissolving; Add dropwise 3ml analytical pure glacial acetic acid in tin sulfate solution, stir After uniformity, add 145ml of titanium tetrachloride, and slowly add 15ml of ultrapure water dropwise under rapid stirring at a temperature of 40°C to obtain a transparent and stable gel solution;

[0032] (2) Using CTAB as the structure-directing agent, using ultrapure water at 50°C as the solvent, and Sn: CTAB molar ratio of 1:20, prepare a CTAB solution with the same volume as the gel solution obtained in step (1), which is the template Agent sol solution;

[0033] (3) Slowly add the templating agent sol solution to the gel solution prepared in step (1) at a stirring speed of 150 rad / min, and react for 15 hours at a temperature of 60° C. to obtain a mixed liquid of the precursor of the mesoporous titan...

Embodiment 2

[0036] (1) The concentrated hydrochloric acid of 4ml 12mol / L is added dropwise in 840ml dehydrated alcohol, after stirring evenly, add 21g tin chloride, obtain tin chloride solution after dissolving; Add dropwise 2.5ml analytical pure ice in the tin chloride solution Acetic acid, after stirring evenly, add 160ml of butyl titanate, and slowly add 15ml of ultrapure water dropwise under rapid stirring at a temperature of 40°C to obtain a transparent and stable gel solution;

[0037] (2) Using CTAB as the structure-directing agent, using ultrapure water at 50°C as the solvent, and Sn: CTAB molar ratio of 1:50, prepare a CTAB solution with the same volume as the gel solution prepared in step (1), namely Templating agent sol solution;

[0038] (3) Slowly add the templating agent sol solution to the gel solution prepared in step (1) at a stirring speed of 130 rad / min, and react for 10 h at a temperature of 60° C. to obtain a mixed solution of a mesoporous titania molecular sieve prec...

Embodiment 3

[0041] (1) Add 6ml of 12mol / L concentrated hydrochloric acid dropwise to 840ml of absolute ethanol, add 20g of tin sulfate after stirring evenly, and obtain a tin sulfate solution after dissolving; add 2ml of analytical pure glacial acetic acid dropwise to the tin sulfate solution, and stir well Then add 154ml of butyl titanate, and slowly add 13ml of ultrapure water dropwise under rapid stirring at 40°C to obtain a transparent and stable gel solution;

[0042] (2) Using CTAB as a structure-directing agent, using ultrapure water at 50°C as a solvent, and having a Sn:CTAB molar ratio of 1:35, prepare a CTAB solution with the same volume as the gel solution prepared in step (1), namely Templating agent sol solution;

[0043] (3) Slowly add the templating agent sol solution to the gel solution prepared in step (1) at a stirring speed of 130 rad / min, and react for 10 h at a temperature of 60° C. to obtain a mixed solution of a mesoporous titania molecular sieve precursor, which is...

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Abstract

The invention belongs to the technical field of catalysts, and particularly relates to a preparation method of an ozone oxidation catalyst. The nanoscale ozone oxidation catalyst prepared by the method of the invention is made of SnO 2 and TiO 2 A nanoscale Sn / Ti composite material formed by the eutectic growth of two metal oxides. The present invention adopts nano-Sn / Ti bimetallic composite materials and uses template agents as structural guides, so that metal crystals grow in a certain skeleton structure, and at the same time, the material has a certain spatial structure and has good adsorption performance. The ozone oxidation catalyst obtained by the method of the present invention has extremely high active component content, high pollutant removal rate, high catalytic activity, low loss of active components and does not affect the catalyst activity. It is effective for chloramphenicol wastewater, penicillin wastewater, erythromycin wastewater, Ozone catalytic oxidation treatment of antibiotic wastewater such as streptomycin wastewater, vancomycin wastewater and pipemidic acid wastewater has obvious catalytic effect.

Description

technical field [0001] The invention belongs to the technical field of catalysts, in particular to a preparation method of an ozone oxidation catalyst. Background technique [0002] Antibiotic pollution is the most important type of pollution in pharmaceuticals and personal care products (PPCPs). Because antibiotics have the characteristics of wide pollution, refractory degradation, high toxicity, and easy deposition, and the traditional water treatment process has poor removal effect on antibiotics. Antibiotics may cause microbial resistance, posing a major threat to human health and ecosystems. Commonly used treatment technologies for antibiotic wastewater include incineration, micro-electrolysis, Fenton's reagent method and other advanced oxidation technologies. Among them, the micro-electrolysis method uses iron-carbon to form a tiny primary battery to release new ecological Fe 2+ and [H] react with the components in the solution to achieve the purpose of removing poll...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/14B01J35/10C02F1/72C02F1/78
CPCC02F1/725C02F1/78B01J23/002B01J23/14C02F2103/003B01J35/61
Inventor 凌明林丰李婷朱宏博郭慧
Owner 浙江巨能环境工程有限公司
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