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A lanthanum-modified manganese oxide catalyst, its preparation method and its application

A manganese oxide, catalyst technology, applied in the field of catalyst, to achieve the effect of high specific surface area and shortening time

Active Publication Date: 2021-10-19
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are few reports on the use of lanthanum to modify manganese oxide and apply it to the catalytic decomposition of ozone at room temperature.

Method used

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  • A lanthanum-modified manganese oxide catalyst, its preparation method and its application
  • A lanthanum-modified manganese oxide catalyst, its preparation method and its application
  • A lanthanum-modified manganese oxide catalyst, its preparation method and its application

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Embodiment 1

[0032] A kind of embodiment of the preparation method of the lanthanum-modified manganese oxide catalyst of the present invention, this preparation method comprises the following steps:

[0033] (1) At room temperature, manganese sulfate monohydrate and potassium permanganate are dissolved in deionized water in a mol ratio of 3:8, and stirred evenly to obtain a mixed solution;

[0034] (2) subjecting the mixed solution obtained in step (1) to hydrothermal treatment, the conditions of hydrothermal treatment are temperature 90°C, time 24h, and after the end, the obtained solid product is washed with deionized water, filtered, and dried to obtain a black solid;

[0035] (3) Add lanthanum nitrate hydrate to a solution of a certain concentration and add it to the black solid obtained in step (2), stir evenly and let it stand for a while to obtain a mixture A, wherein the La atom in the lanthanum salt and the La atom in the black solid The mass ratio of Mn atoms is m La :m Mn =0.0...

Embodiment 2

[0039] A kind of embodiment of the preparation method of the lanthanum-modified manganese oxide catalyst of the present invention, this preparation method comprises the following steps:

[0040] (1) At room temperature, manganese sulfate monohydrate and ammonium persulfate are dissolved in deionized water at a molar ratio of 1:1, and stirred evenly to obtain a mixed solution;

[0041] (2) The mixed solution obtained in step (1) is subjected to hydrothermal treatment, the conditions of hydrothermal treatment are temperature 160°C, time 12h, and after the end, the obtained solid product is sequentially washed with deionized water, filtered, and dried to obtain a black solid;

[0042] (3) Add lanthanum nitrate hydrate to a solution of a certain concentration and add it to the black solid obtained in step (2), stir evenly and let it stand for a while to obtain a mixture A, wherein the La atom in the lanthanum salt and the La atom in the black solid The mass ratio of Mn atoms is m ...

Embodiment 3

[0046] A kind of embodiment of the preparation method of the lanthanum-modified manganese oxide catalyst of the present invention, this preparation method comprises the following steps:

[0047](1) At room temperature, manganese sulfate monohydrate and potassium permanganate are dissolved in deionized water in a mol ratio of 3:8, and stirred evenly to obtain a mixed solution;

[0048] (2) The mixed solution obtained in step (1) is subjected to hydrothermal treatment, the conditions of hydrothermal treatment are temperature 160°C, time 12h, and after the end, the obtained solid product is sequentially washed with deionized water, filtered, and dried to obtain a black solid;

[0049] (3) Add lanthanum nitrate hydrate to a solution of a certain concentration and add it to the black solid obtained in step (2), stir evenly and let it stand for a while to obtain a mixture A, wherein the La atom in the lanthanum salt and the La atom in the black solid The mass ratio of Mn atoms is m ...

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Abstract

The invention provides a lanthanum-modified manganese oxide catalyst, its preparation method and application. The preparation method of the lanthanum-modified manganese oxide catalyst of the present invention is to prepare manganese oxide by hydrothermally treating divalent manganese salt and permanganate or persulfate, then doping lanthanum salt in the manganese oxide, and drying Lanthanum-modified manganese oxide catalysts can be obtained after high-temperature calcination treatment, and the prepared lanthanum-modified manganese oxide catalysts can efficiently catalyze and decompose ozone at room temperature, compared with unmodified manganese oxides , which greatly shortens the time required to decompose ozone at room temperature.

Description

technical field [0001] The invention belongs to the field of catalysts and environmental catalytic purification, and relates to a lanthanum-modified manganese oxide catalyst, its preparation method and its application. Background technique [0002] Ozone is a common oxidizing agent. Prolonged exposure of the human body to ozone can damage the immune function and nervous system. The main source of ozone near the ground surface is the residue after using ozone in the fields of medical and health care, food preservation, water quality treatment and so on. Green, efficient, safe, stable and economical ozonolysis technology is urgently needed by human beings. [0003] The method of catalytic decomposition of ozone at room temperature has the characteristics of high efficiency, safety, stability and economy, and has attracted the attention of the academic circle. For example, patent CN105312061 uses a composite material based on porous activated carbon or molecular sieve as a ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/34B01D53/86B01D53/66
CPCB01D53/8675B01J23/34Y02A50/20
Inventor 刘自力孔智仪左建良郑文芝
Owner GUANGZHOU UNIVERSITY
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