Interlayer cesium-enriched delta-MnO2 catalyst as well as preparation method and application thereof

A catalyst and cesium salt technology are applied in the field of interlayer cesium-rich δ-MnO2 catalyst and its preparation, which can solve the problems of long reaction time and incomplete ion replacement, and achieve simple and easy preparation method, stable product and repeatability. Good results

Inactive Publication Date: 2017-11-24
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method takes a long time to react and has the defect of incomplete ion replacement

Method used

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  • Interlayer cesium-enriched delta-MnO2 catalyst as well as preparation method and application thereof
  • Interlayer cesium-enriched delta-MnO2 catalyst as well as preparation method and application thereof
  • Interlayer cesium-enriched delta-MnO2 catalyst as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1. Preparation:

[0032] (1) Dissolve 3mmol of manganese chloride and 30mmol of ammonium bicarbonate in 30ml of ethylene glycol, stir at room temperature until dissolved, then place in an oven, heat to 80°C, and keep the temperature constant for 12h. After the reaction is complete, cool to room temperature, and the obtained product Centrifuge and wash with water and ethanol for several times, and finally put it into a drying oven at 60°C for 12 hours to obtain the precursor manganese carbonate microspheres.

[0033] (2) Mix cesium acetate and precursor manganese carbonate microspheres at a molar ratio of 0.25:1, then place them in a muffle furnace, and raise the temperature to 450°C at a rate of 1°C / min in an air environment, and keep the temperature constant for 3h. Cool to room temperature to obtain interlayer cesium-rich δ-MnO 2 catalyst.

[0034] 2. Performance test: the obtained interlayer cesium-rich δ-MnO 2 The catalyst is characterized by X-ray diffraction an...

Embodiment 2

[0036] Dissolve 3mmol of manganese chloride and 15mmol of sodium bicarbonate in 30ml of ethylene glycol, stir at room temperature until dissolved, then place in an oven, heat to 60°C, and keep the temperature constant for 6h. Centrifuge and wash several times, and finally put it into a drying oven at 60°C for 12 hours to obtain precursor manganese carbonate microspheres, mix cesium nitrate with the obtained precursor manganese carbonate microspheres at a molar ratio of 0.25:1, and then place them in a In the Furnace, in the air environment, the temperature was raised to 450°C at a rate of 1°C / min, kept at a constant temperature for 2h, and cooled to room temperature. The interlayer cesium-rich δ-MnO 2 catalyst.

Embodiment 3

[0038] Dissolve 3mmol of manganese sulfate and 15mmol of ammonium bicarbonate in 30ml of ethylene glycol, stir at room temperature until dissolved, then place in an oven, heat to 80°C, and keep the temperature constant for 6h. After the reaction is complete, cool to room temperature, and centrifuge the resulting product with water and ethanol Wash several times, and finally dry it in a 60°C drying oven for 12 hours to obtain precursor manganese carbonate microspheres. Mix cesium acetate and the obtained precursor manganese carbonate microspheres at a molar ratio of 0.3:1, and then place them in a muffle In the furnace, in the air environment, the temperature was raised to 350°C at a rate of 3°C / min, kept at a constant temperature for 3h, and cooled to room temperature. That is, the interlayer cesium-rich δ-MnO 2 catalyst.

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Abstract

The invention discloses a preparation method of an interlayer cesium-enriched delta-MnO2 catalyst. The method comprises the following steps:(1) thoroughly mixing and dissolving soluble manganese salts and soluble hydrogencarbonate in an alcohol solution, performing a solvent thermal reaction, and performing washing and drying so as to obtain precursor manganese carbonate microspheres; and (2) mixing the precursor manganese carbonate microspheres with cesium salt, and performing roasting under the condition of warming in the air, so as to obtain the interlayer cesium-enriched delta-MnO2 catalyst. The raw materials for the preparation method are cheap and easy to obtain, the synthesis technology is simple and feasible, the preparation cost is low, the product quality is stable, and the technology is high in repeatability. The prepared interlayer cesium-enriched delta-MnO2 catalyst has favorable catalytic activity when being used for catalysing toluene combustion.

Description

technical field [0001] The invention belongs to the field of preparation of inorganic materials, more specifically, relates to a δ-MnO rich in cesium between layers 2 Catalyst and its preparation method and application. Background technique [0002] With the rapid development of industry, the problem of environmental pollution has become more and more serious. As the main source of air pollution, volatile organic gases (VOCs) not only affect the ecological environment, but also cause serious harm to people's health. Therefore, it is imminent to find and develop suitable catalysts to effectively treat VOCs. At present, precious metals (gold, platinum, palladium, etc.) have excellent performance in catalytic combustion of VOCs, but they are expensive and not suitable for industrial production. Manganese dioxide has an important application prospect because it is cheap, easy to obtain, environmentally friendly, safe, has a special pore structure, has variable valence (+3, +4...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01J37/08B01D53/86B01D53/72
CPCB01D53/72B01D53/8668B01D2257/7027B01D2257/708B01J23/34B01J37/088
Inventor 余林何彬彬杨泽超叶文锦杨润农程高孙明
Owner GUANGDONG UNIV OF TECH
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