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Tubular ozone advanced oxidation catalyst

An advanced oxidation and catalyst technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, oxidized water/sewage treatment, etc., can solve the problem of low dispersion and avoid low porosity Effect

Pending Publication Date: 2022-05-10
杭州同晨环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The size of the porosity formed by this method is related to the process and the material itself, sometimes the closed pores will be burned out, and there are shortcomings such as the low dispersion of the egg yolk-type active components in the entire catalyst.

Method used

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  • Tubular ozone advanced oxidation catalyst
  • Tubular ozone advanced oxidation catalyst
  • Tubular ozone advanced oxidation catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Take 10g layered material K 2 h 2 Nb 6 o 17 , dispersed in 1L deionized water, stirred in an ice-water mixing bath, added tetrabutylammonium hydroxide (TBAOH), adjusted the pH value to 10, stirred for 3 days, and centrifuged at 10000rpm to obtain the upper layer suspension. Take 1ml of the upper layer suspension and dry at 105°C for 24h to obtain [Nb 6 o 17 ] 4- Nano volume thickness ≤ 2nm, nano volume length 200-500nm, nano volume [Nb 6 o 17 ] 4- Concentration 2mg / mL.

[0025] Take the above 2mg / mL nanovolume [Nb 6 o 17 ] 4- Suspension 500mL, add 0.1mol / L ferric nitrate solution dropwise to flocculate all the nanovolumes, continue stirring for 4h, centrifuge at 10000rpm, dry the obtained solid under vacuum at 80°C for 12h, calcining at 525°C, and calcining for 3h, to obtain Tubular Fe / Nb 2 o 5 .

[0026] Take 1g of tubular Fe / Nb 2 o 5 , add 100ml of deionized water to disperse, add 0.054g of manganese nitrate, stir and dissolve fully, dry by rotary eva...

Embodiment 2

[0028] Take 10g layered material K 2 h 2 Nb 6 o 17 , dispersed in 1L deionized water, stirred in an ice-water mixing bath, added tetrabutylammonium hydroxide (TBAOH), adjusted the pH value to 10, stirred for 7 days, and centrifuged at 9000rpm to obtain the upper suspension. Take 1ml of the upper layer suspension and dry at 105°C for 24h to obtain [Nb 6 o 17 ] 4- Nano volume thickness ≤ 2nm, nano volume length 200-500nm, nano volume [Nb 6 o 17 ] 4- Concentration 4mg / mL.

[0029] Take the above 4mg / mL nanovolume [Nb 6 o 17 ] 4- Suspension 500mL, 0.1mol / L ferric chloride solution was added dropwise to flocculate all the nanovolumes, stirring time was 4h, centrifugation speed was 9000rpm, the obtained solid was vacuum-dried at 80°C for 12h, calcining temperature was 525°C, calcining time was 3h, and obtained Tubular Fe / Nb 2 o 5 .

[0030] Take 1g of tubular Fe / Nb 2 o 5 , add 100ml of deionized water to disperse, add 0.18g of manganese nitrate, stir and dissolve fu...

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Abstract

The invention provides a preparation method of a tubular ozone advanced oxidation catalyst, namely a delamination-flocculation-impregnation method, which comprises the following steps of: delaminating a layered material K2H2Nb6O17 by using organic ammonium ions to form a nano roll [Nb6O17] < 4-> suspension, adding an iron source for flocculation, roasting at a certain temperature, calcining the [Nb6O17] < 4-> nano roll structure into tubular Fe / Nb2O5, and preparing the tubular ozone advanced oxidation catalyst by using an impregnation method to obtain the tubular ozone advanced oxidation catalyst. Manganese is loaded on Fe-Nb2O5 to be roasted to form the Mn-Fe / Nb2O5 catalyst, and the method is different from direct loading of a traditional tubular carrier: iron oxide and an Nb2O5 tubular structure are simultaneously formed in the calcination process of iron loaded through a delamination-flocculation method. The iron oxide in the catalyst is tightly combined with the surface of the carrier, is not easy to dissolve out in the reaction process, has a certain pore structure, and is beneficial to ozone catalytic advanced oxidation.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a tubular advanced ozone oxidation catalyst and a preparation method thereof. Background technique [0002] Highly reactive hydroxyl radical (OH) is an important active oxygen, which is formed by the loss of an electron from hydroxide (OHˉ). OH has a strong oxidation ability, and its oxidation potential is second only to F, which is suitable for refractory degradation The application fields of organic pollutants, such as coal chemical wastewater, pharmaceutical wastewater, pesticide wastewater, printing and dyeing wastewater, etc. [0003] There are many ways to produce OH, such as Fenton H 2 o 2 -Fe 2+ System, Catalyst and Non-Fenton Reaction of Hydrogen Peroxide, UV-H 2 o 2 system, electric Fenton system, etc. However, these methods will produce active Fe sludge, low catalytic efficiency, low electrical efficiency, and limited electrode materials. In recent years, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/648B01J23/889B01J35/00B01J35/02C02F1/72C02F1/78
CPCB01J23/8892B01J23/6484C02F1/725C02F1/78B01J35/396B01J35/50
Inventor 左同梅
Owner 杭州同晨环保科技有限公司
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