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Preparation method of manganese-cerium oxide catalyst for removing formaldehyde at room temperature

A catalyst and oxide technology, applied in the field of preparation of manganese cerium oxide catalyst, can solve the problems of low formaldehyde removal rate and the like, and achieve the effects of simple preparation process, enhanced reducibility and promotion of removal rate

Pending Publication Date: 2021-06-18
XI'AN POLYTECHNIC UNIVERSITY
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a preparation method of manganese cerium oxide catalyst for removing formaldehyde at room temperature, which solves the problem of low formaldehyde removal rate of existing transition metal oxides at room temperature

Method used

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  • Preparation method of manganese-cerium oxide catalyst for removing formaldehyde at room temperature

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preparation example Construction

[0026] A kind of preparation method of manganese cerium oxide catalyst that removes formaldehyde at room temperature is characterized in that, comprises the steps:

[0027] Step 1, preparation of catalyst precursor

[0028] Add cerium nitrate and potassium permanganate in deionized water in sequence, place in a constant temperature magnetic stirring apparatus and stir for 0.5 h until fully dissolved to obtain a raw material solution, wherein the molar ratio of Mn / Ce in the raw material solution is 1:1.

[0029] Then the raw material solution was drained into a polytetrafluoroethylene-lined stainless steel reactor through a glass rod, and placed in an oven for hydrothermal reaction at a hydrothermal temperature of 120°C and a hydrothermal time of 24 hours;

[0030] After the hydrothermal reaction is completed, take out the polytetrafluoroethylene-lined stainless steel reactor and cool it to normal temperature, and separate the solution from solid to liquid to obtain a catalyst ...

Embodiment

[0044]Take a beaker with a volume of 50ml, add 20ml of deionized water, add the rotor, place it on a constant temperature magnetic stirring instrument, weigh 0.0075mol of cerium nitrate through an electronic balance, add it to the beaker, and after it is fully dissolved, weigh 0.0075mol of potassium permanganate Add it into a beaker and stir at a constant speed for 0.5h at room temperature to fully dissolve the solution.

[0045] Transfer the above solution to a 50mL polytetrafluoroethylene-lined stainless steel reactor, and place the reactor in an oven at 120°C for hydrothermal reaction; after 24 hours, take out the 50mL polytetrafluoroethylene-lined stainless steel reactor in the oven, and Cool down to room temperature, open the reactor, pour the solution into a prepared beaker, perform suction filtration, take the filtered material and add it to a centrifuge tube, wash with alcohol for 3 times, wash with water for 3 times, and centrifuge at a speed of 2000r / min. The superna...

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Abstract

The invention discloses a preparation method of a manganese-cerium oxide catalyst for removing formaldehyde at room temperature, which comprises the following steps: step 1, preparing a catalyst precursor by taking cerium nitrate and potassium permanganate as raw materials; step 2, uniformly spreading the catalyst precursor obtained in the step 1 in a low-temperature plasma discharge device, and carrying out plasma roasting on the catalyst precursor; and step 3, calcining: calcining the catalyst precursor treated in the step 2 in a muffle furnace to obtain the manganese-cerium oxide catalyst. According to the catalyst obtained through the preparation method, the specific surface area of the catalyst is increased, the adsorption capacity of the catalyst to formaldehyde in the environment is enhanced, meanwhile, the crystallinity of the catalyst is reduced, active components are more dispersed, reducibility is enhanced, more oxygen vacancies are promoted to be formed on the surface of the catalyst, and the formaldehyde catalytic oxidation activity of the catalyst at the room temperature is improved.

Description

technical field [0001] The invention belongs to the technical field of preparation methods of manganese-cerium catalysts, and in particular relates to a preparation method of manganese-cerium oxide catalysts for removing formaldehyde at room temperature. Background technique [0002] Formaldehyde was classified as carcinogenic and teratogenic by the World Health Organization in 2004. In daily life, the source of formaldehyde is mainly in interior decoration materials. If the human body is in this environment for a long time, the harm will be immeasurable. At present, the removal methods of formaldehyde mainly include ventilation method, plant purification method, physical adsorption method, plasma method, and catalytic oxidation method. Among these methods for removing formaldehyde, the catalytic oxidation method has attracted much attention because of its advantages of simple operation and easy control, and no pollution to the reaction product. [0003] However, the diffi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01D53/86B01D53/72
CPCB01J23/34B01J23/002B01D53/8668
Inventor 李茹牛惠翔胡旌钰邢倩云杨鑫王雪艳
Owner XI'AN POLYTECHNIC UNIVERSITY
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