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Room-temperature decomposition ozone catalysis material and preparation method thereof

A catalytic material, manganese oxide technology, applied in the fields of catalysis and environmental science, can solve problems such as poor moisture resistance

Inactive Publication Date: 2009-02-04
李永刚
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, poor moisture resistance and the need for additional energy input are the biggest obstacles to the widespread application of these catalysts

Method used

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  • Room-temperature decomposition ozone catalysis material and preparation method thereof
  • Room-temperature decomposition ozone catalysis material and preparation method thereof
  • Room-temperature decomposition ozone catalysis material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Titanium-doped manganese oxide molecular sieve powders were synthesized by potassium permanganate (KMnO 4 ) and potassium persulfate (K 2 S 2 o 8 ) in nitric acid solution to oxidize manganese sulfate (MnSO 4 ·H 2 O), while adding titanium sulfate (Ti(SO 4 ) 2 ), the Ti / Mn molar ratio is 0 to 0.20, and the resulting black precipitate is vigorously stirred and refluxed at 100°C for 24h, filtered, washed, dried at 110°C for 12h, and then calcined at 500°C for 6 hours to obtain the oxidation of doped titanium. Manganese molecular sieve powder, respectively denoted as Ti-OMS-0-RF, Ti-OMS-5-RF, Ti-OMS-10-RF and Ti-OMS-20-RF, where Ti-OMS means titanium-doped manganese oxide Molecular sieve, the number indicates Ti / Mn total The molar ratio percentage, RF represents the reflux synthesis method, ie (Refluxing).

[0032] XRD analysis and HRTEM analysis indicated that the material was Hollandite type manganese oxide.

[0033] The performance tests of the catalytic materi...

Embodiment 2

[0035] Titanium-doped manganese oxide molecular sieve powders were synthesized by potassium permanganate (KMnO 4 ) and potassium persulfate (K 2 S 2 o 8 ) in nitric acid solution to oxidize manganese sulfate (MnSO 4 ·H 2 O), while adding titanium sulfate (Ti(SO 4 ) 2 ), then transferred to an autoclave, sealed and kept at a constant temperature of 160°C for 48h, after natural cooling, filtered, washed, dried at 110°C for 24h, and then roasted at 500°C to obtain titanium-doped manganese oxide molecular sieve powder, respectively calculated as Ti -OMS-0-HT, Ti-OMS-5-HT, Ti-OMS-10-HT and Ti-OMS-20-HT, where Ti-OMS represents titanium-doped manganese oxide molecular sieve, and the numbers represent Ti / Mn total The molar ratio percentage, HT represents the hydrothermal synthesis method, ie (Hydrothermal).

[0036]XRD analysis and HRTEM analysis showed that the material was Hollandite manganese oxide, and titanium ions were located on the framework of manganese oxide molecula...

Embodiment 3

[0039] Cobalt-doped manganese oxide molecular sieve powders were synthesized by potassium permanganate (KMnO 4 ) and potassium persulfate (K 2 S 2 o 8 ) in nitric acid solution to oxidize manganese sulfate (MnSO 4 ·H 2 O), while adding cobalt nitrate (Co(NO 3 ) 2 ·6H 2 O), the Co / Mn molar ratio is 0 to 0.20, the resulting black precipitate is vigorously stirred and refluxed at 100°C for 24h, filtered, washed, dried at 110°C for 12h, and then calcined at 500°C for 6 hours to obtain doped cobalt Manganese oxide molecular sieve powder, respectively counted as Co-OMS-0-RF, Co-OMS-8-RF and Co-OMS-20-RF, where Co-OMS means titanium-doped manganese oxide molecular sieve, and the number means Co / Mn total The molar ratio percentage, RF represents the hydrothermal synthesis method, ie (Refluxing).

[0040] XRD analysis and HRTEM analysis showed that the material was Hollandite manganese oxide, and cobalt ions were located on the framework of manganese oxide molecular sieve.

[...

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Abstract

The invention discloses a manganese oxide molecular sieve-doped monolithic catalyst for decomposing ozone (O3) at room temperature and a preparation method thereof, which relates to the fields of catalysis and environmental protection. The preparation method is characterized in that a ceramic honeycomb monolithic type or porous foam metal carrier is adopted, and the manganese oxide molecular sieve doped with cobalt or titanium is taken as an active component. The manganese oxide molecular sieve doped with the cobalt or titanium is characterized in that: 1) the manganese oxide molecular sieve has Hollandite-typed manganese oxide octahedral molecular sieves (OMS-2) structure, the pore size is about 0.46nm multiplied by 0.46nm; 2) cobalt or titanium ions are introduced on a framework of the Hollandite-typed manganese oxide octahedral molecular sieves to form the manganese oxide molecular sieve doped with cobalt or titanium. An ozone decomposition catalyst is prepared by an oxidation reduction-refluxing method or an oxidation reduction-hydrothermal synthesis method, namely, the solution with manganese salt and cobalt salt or titanium salt is added with a strong oxidizer to synthesize the ozone decomposition catalyst by refluxing at the temperature of 90-200 DEG or hydrothermal process for more than 12 hours. The monolithic catalyst is characterized in that the input of additional energy sources such as light, heat, electricity, and the like, is unnecessary, and the ozone can be stably decomposed into oxygen under the conditions of normal temperature, normal humidity and large air volume.

Description

technical field [0001] The present invention is a kind of room temperature decomposition ozone (O 3 ) doped manganese oxide molecular sieve monolithic catalytic material and a preparation method thereof, relating to the fields of catalysis and environmental science. It is characterized in that honeycomb ceramics or porous metal foam are used as carriers, and Hollandite-type manganese oxide molecular sieves doped with silver, cobalt or titanium are used as active components. The characteristic of this monolithic catalyst is that it does not require the input of additional light, heat, electricity and other energy sources, and it converts O 3 decomposes into oxygen (O 2 ). [0002] The present invention also relates to a preparation method of the above-mentioned catalytic material. [0003] The present invention also relates to the application of the above catalytic material to decompose ozone at room temperature. Background technique [0004] Ozone (O 3 ) is a strong ox...

Claims

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Application Information

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IPC IPC(8): B01J23/34B01J21/06B01J23/889B01D53/66
CPCY02A50/20
Inventor 请求不公布姓名
Owner 李永刚
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