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Ozone decomposition catalyst and preparation method and application thereof

An ozone decomposition and catalyst technology, applied in the field of chemical catalytic decomposition, can solve problems such as difficulty in realizing mass production

Active Publication Date: 2021-05-28
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the hydrothermal synthesis method used is difficult to achieve mass production

Method used

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  • Ozone decomposition catalyst and preparation method and application thereof
  • Ozone decomposition catalyst and preparation method and application thereof
  • Ozone decomposition catalyst and preparation method and application thereof

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[0022] The present invention relates to a kind of preparation method of ozone decomposition catalyst, comprising:

[0023] a) fully reacting the mixed aqueous solution of permanganate and inorganic ammonium salt with alcohol reducing agent to obtain the first reaction liquid;

[0024] b) separating the first reaction liquid from solid to liquid, mixing the solid component with an aqueous solution of inorganic ammonium salt and standing for aging to obtain a second reaction liquid;

[0025] c) separating the second reaction liquid from solid to liquid, and drying the solid components.

[0026] In some embodiments, in step b), the solid component is washed and then mixed with an aqueous solution of inorganic ammonium salt.

[0027] In some embodiments, the molar ratio of the alcohol reducing agent to the permanganate in step a) is 0.25-6.5, and can also be selected from 0.4, 0.6, 0.8, 1.0, 1.2, 1.4, 1.6, 1.8, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5, 5.5 or 6; the molar ratio of ammoni...

Embodiment 1

[0057] Weigh 10g of potassium permanganate and dissolve in 500mL of deionized water, dissolve with ultrasonic and stirring to form a uniform solution. Weigh 20g of ammonium chloride and add it to the above potassium permanganate solution, ultrasonically and stir to dissolve, so that it is completely mixed evenly. Then 10 mL of methanol was added, and the resulting solution was placed in a water bath at 60° C. and continuously stirred for 1 h. Then the obtained solid was filtered, washed with deionized water, put into 250mL of 1mol / L ammonium sulfate solution, stirred to mix evenly, and the obtained suspension was placed in a water bath at 60°C for 24h, and then the obtained The solid was filtered, washed with deionized water, and dried in an oven at 105° C. to obtain the manganese dioxide catalyst.

[0058] figure 1 It is the X-ray diffraction spectrum of the manganese dioxide catalyst of embodiment 1, according to XRD standard card (JCPDS 80-1098), the diffraction peak that...

Embodiment 2

[0061] Weigh 6g of sodium permanganate and dissolve it in 120mL of deionized water, ultrasonically and stir to dissolve to form a uniform solution. Weigh 6g of ammonium bisulfate and add it into the above potassium permanganate solution, ultrasonically and stir to dissolve, and make it completely mix evenly. Subsequently, 7 mL of methanol was added, and the resulting solution was placed in a water bath at 70° C. and continuously stirred for 6 h. Then filter the obtained solid, wash it with deionized water, put it into 100mL of 0.3mol / L ammonium bicarbonate solution, stir it to mix it completely, place the obtained suspension in a water bath at 50°C and let it age for 120h. Subsequently, the obtained solid was filtered, washed with deionized water, and dried in an oven at 95° C. to obtain the manganese dioxide catalyst.

[0062] image 3 Be the Fourier transform infrared spectrogram of the manganese dioxide catalyst of embodiment 2, wherein, be positioned at 1400cm -1 and 31...

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Abstract

The invention relates to a preparation method of an ozone decomposition catalyst. The preparation method is characterized by comprising the following steps: a) fully reacting a mixed aqueous solution of permanganate and inorganic ammonium salt with an alcohol reducing agent to obtain a first reaction solution; b) carrying out solid-liquid separation on the first reaction liquid, uniformly mixing a solid component with the inorganic ammonium salt aqueous solution, standing and aging to obtain a second reaction liquid; and c) carrying out solid-liquid separation on the second reaction liquid, and drying a solid component. The preparation method provided by the invention is mild and low in cost, the preparation condition does not need high temperature and high pressure, large-scale production can be realized, and the catalyst does not need noble metal as an active component. Under the conditions of room temperature and humidity, the catalyst can efficiently and stably decompose ozone in air, and the performance is very excellent.

Description

technical field [0001] The invention is a chemical catalytic decomposition technology, which belongs to the technical field of pollutant decomposition in ambient air, and specifically relates to an ozone decomposition catalyst and its preparation method and application. Background technique [0002] Ozone pollution near the ground is becoming more and more serious. Ozone is a strong oxide that can have serious adverse effects on human health. Studies have shown that long-term exposure to low concentrations of ozone will increase public mortality due to respiratory diseases (Environmental Health Perspectives, 2017,125:8CID:087021). The "Ambient Air Quality Standard" (GB3095-2012), which was updated in 2012 in my country, stipulates that the daily maximum 8-hour average ozone concentration limit is 100 μg / m 3 (primary standard) and 160μg / m 3 (Secondary standard), the 1-hour average ozone concentration limit is 160μg / m 3 (Class I standard) and 200μg / m 3 (secondary standard)...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/10B01D53/86B01D53/66
CPCB01J27/24B01D53/8675B01J35/61B01J35/635B01J35/64Y02A50/20
Inventor 张彭义曹冉冉高乐乐
Owner TSINGHUA UNIV
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