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Yolk-shell-structure cryptomelane-type manganese dioxide catalyst as well as preparation method and application thereof

A technology of manganese dioxide and shell structure, which is applied in the field of egg yolk-shell structure manganese potassium ore type manganese dioxide catalyst and its preparation, can solve the problems of long synthesis period and high device pressure, and achieve low cost, high catalytic activity and high product quality. The effect of uniform shape

Active Publication Date: 2019-03-19
广东智达伊诺为科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods have disadvantages such as high device pressure and long synthesis cycle, which limit their application to a certain extent.

Method used

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  • Yolk-shell-structure cryptomelane-type manganese dioxide catalyst as well as preparation method and application thereof
  • Yolk-shell-structure cryptomelane-type manganese dioxide catalyst as well as preparation method and application thereof
  • Yolk-shell-structure cryptomelane-type manganese dioxide catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Dissolve 1.58g of ammonium bicarbonate in 25mL of deionized water, add 500mL of cyclohexane, 25mL of n-butanol, and 20g of cetyltrimethylammonium bromide, and continue stirring until the solution is clear.

[0024] After dissolving 1.69g of manganese sulfate in 25mL of water, add it dropwise to the above mixture, and keep stirring for 20min.

[0025] The solution was centrifuged at 9000r for 3~5min, and the solid residue was washed with ethanol and water alternately for 3 times.

[0026] Put it into a vacuum oven at 90°C for 8 hours to obtain manganese carbonate powder.

[0027] Dissolve 1 g of the dried manganese carbonate powder in 272 mL of deionized water, add 1.375 g of potassium permanganate, ultrasonicate for 2 min, and stir for 20 min.

[0028] The obtained solution was centrifuged at 9000r for 3~5min, and the solid residue was washed with ethanol and water alternately for 3 times.

[0029] Put it into an oven at 100°C and dry for 8 hours to obtain a precursor...

Embodiment 2

[0032] Dissolve 1.58g of ammonium bicarbonate in 25mL of deionized water, add 500mL of cyclohexane, 25mL of n-butanol, and 20g of cetyltrimethylammonium bromide, and continue stirring until the solution is clear.

[0033] After dissolving 1.69g of manganese sulfate in 25mL of water, add it dropwise to the above mixture, and keep stirring for 20min.

[0034] The solution was centrifuged at 9000r for 3~5min, and the solid residue was washed with ethanol and water alternately for 3 times.

[0035] Put it into a vacuum oven at 90°C for 8 hours to obtain manganese carbonate powder.

[0036] Dissolve 1 g of the dried manganese carbonate powder in 272 mL of deionized water, add 1.375 g of potassium permanganate, ultrasonicate for 2 min, and stir for 20 min.

[0037] The obtained solution was centrifuged at 9000r for 3~5min, and the solid residue was washed with ethanol and water alternately for 3 times.

[0038] Put it into an oven at 100°C and dry for 8 hours to obtain a precursor...

Embodiment 3

[0041] Dissolve 1.58g of ammonium bicarbonate in 25mL of deionized water, add 500mL of cyclohexane, 25mL of n-butanol, and 20g of cetyltrimethylammonium bromide, and continue stirring until the solution is clear.

[0042] After dissolving 1.69g of manganese sulfate in 25mL of water, add it dropwise to the above mixture, and keep stirring for 20min.

[0043] The solution was centrifuged at 9000r for 3~5min, and the solid residue was washed with ethanol and water alternately for 3 times.

[0044] Put it into a vacuum oven at 90°C for 8 hours to obtain manganese carbonate powder.

[0045] Dissolve 1 g of the dried manganese carbonate powder in 272 mL of deionized water, add 1.375 g of potassium permanganate, ultrasonicate for 2 min, and stir for 20 min.

[0046] The obtained solution was centrifuged at 9000r for 3~5min, and the solid residue was washed with ethanol and water alternately for 3 times.

[0047] Put it into an oven at 100°C and dry for 8 hours to obtain a precursor...

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Abstract

The invention discloses a yolk-shell-structure cryptomelane-type manganese dioxide catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: synthesizing manganese carbonate powder from a soluble manganese salt water solution, a ammonium hydrogen carbonate water solution, cyclohexane, n-butyl alcohol and cetyl trimethyl ammonium bromideby virtue of a micro-emulsion method, dissolving manganese carbonate into water, and reacting with potassium permanganate, so as to obtain a precursor; and washing the precursor, drying, and roasting300-500 DEG C, so as to obtain the yolk-shell-structure cryptomelane-type manganese dioxide catalyst. The prepared manganese dioxide catalyst is of a mesoporous material, the process is simple, the cost is relatively low, and a product is uniform in shape, relatively good in repeatability and high in catalytic activity. The prepared catalyst can be applied to the removal of volatile organic pollutants in environmental air, the reaction airspeed is 18000h<-1> when the initial solubility of toluene is 1000pm, and the removal rate at 190 DEG C is more than 90% and is obviously superior to traditional precious metal-loaded catalysts.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to an egg yolk-shell structure manganese potassium ore type manganese dioxide catalyst for purifying volatile organic pollutants in ambient air, a preparation method and application thereof. Background technique [0002] Due to the adverse effects on the environment and human health, the pollution of volatile organic compounds (VOCs) produced by industry and transportation has become a problem that cannot be ignored. Catalytic oxidation is an effective method to control the flow of VOCs into the environment. The selection of catalysts becomes the key to this method, in which noble metals are considered to be the most active catalysts for VOCs oxidation. However, the wide industrial application of these catalysts is limited by factors such as high cost, easy sintering and poisoning. In contrast, transition metal oxides are more suitable for practical applications due ...

Claims

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Application Information

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IPC IPC(8): B01J23/34B01J35/08B01J35/10B01D53/86B01D53/72
CPCB01D53/8668B01J23/34B01D2257/708B01D2257/7027B01J35/51B01J35/647
Inventor 丘勇才邬鹏靳小静赵帅奇叶代启陈礼敏刘茂盛陈光需向君毅
Owner 广东智达伊诺为科技有限公司
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