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Modified manganese dioxide with high specific surface area, preparation method and application thereof

A manganese dioxide, modified technology, applied in the field of two-dimensional materials, can solve the problems of low mineralization rate and easy deactivation

Pending Publication Date: 2021-10-22
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, even δ-MnO 2 It still faces problems such as easy deactivation and low mineralization rate.

Method used

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  • Modified manganese dioxide with high specific surface area, preparation method and application thereof
  • Modified manganese dioxide with high specific surface area, preparation method and application thereof
  • Modified manganese dioxide with high specific surface area, preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0044] This embodiment provides a Ni / δ-MnO 2 , the Ni / δ-MnO 2 In Ni:Mn=1:2, the Ni / δ-MnO 2 The preparation method is as follows:

[0045] Weigh 1.500g (0.0095mol) KMnO 4 and 0.720g (0.00555mol) NiCl 2 Dissolve in an appropriate amount of deionized water to obtain a mixed solution;

[0046] Weigh 0.275g (0.0016mol) MnSO 4 ·H 2 O is dissolved in an appropriate amount of deionized water to obtain a manganese sulfate solution;

[0047] Add the manganese sulfate solution to the mixed solution and mix evenly, stir it magnetically, transfer it to a reaction kettle, and conduct a hydrothermal reaction at 160°C for 24 hours, cool, filter, wash, and dry to obtain Ni / δ-MnO 2 .

Embodiment 2

[0049] This embodiment provides a Ni / δ-MnO 2 , the Ni / δ-MnO 2 The difference between the preparation method and Example 1 is only that NiCl 2 The amount of 0.480g (0.0037mol, Ni:Mn=1:3).

Embodiment 3

[0051] This embodiment provides a Ni / δ-MnO 2 , the Ni / δ-MnO 2 The difference between the preparation method and Example 1 is only that NiCl 2 The amount of 0.360g (0.002775mol, Ni:Mn=1:4).

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Abstract

The invention discloses modified manganese dioxide with high specific surface area, a preparation method and application thereof. The invention provides a preparation method of modified manganese dioxide, wherein the preparation method comprises the following steps: mixing permanganate, a divalent manganese salt and a nickel source, and carrying out hydrothermal reaction to obtain modified manganese dioxide, wherein the molar ratio of the permanganate to the divalent manganese salt is (3-10):1, and the temperature of the hydrothermal reaction is 120-200 DEG C. According to the preparation method, the temperature of a hydrothermal reaction is controlled, permanganate and divalent manganese in a specific proportion are combined as raw materials to form delta-MnO2, a nickel source is added in the reaction process for modification, the size of nanosheets of a hydrangea-shaped structure formed by connecting manganese dioxide nanosheets layer by layer is reduced, the number of the nanosheets is increased, and the whole hydrangea-shaped structure is also obviously reduced, so that the specific surface area is greatly increased, the surface oxygen content is greatly increased, and the catalytic activity is also obviously improved.

Description

technical field [0001] The present application relates to the technical field of two-dimensional materials, in particular to modified manganese dioxide with high specific surface area and its preparation method and application. Background technique [0002] The treatment of volatile organic compounds (VOCs) is divided into degradation (such as catalytic oxidation method, combustion method, biological method, plasma decomposition method, ultraviolet photolysis / photooxidation method and photocatalytic oxidation method, etc.) and recovery (such as adsorption method, absorption method, etc.) , condensation method and membrane separation method, etc.) two categories. The focus of the degradation method is to completely convert pollutants into small molecular harmless substances, such as CO 2 and H 2 O, etc., have fewer restrictions than the recovery method. Catalytic oxidation is an effective method to degrade VOCs, and its advantage is that it can achieve the purpose of effic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/06B01J20/28B01J20/30B01J23/889B01J35/02B01J35/08B01J35/10B01J37/10C01G45/02B01D53/02B01D53/86C02F9/04C02F101/10C02F101/16C02F101/30B01J35/00
CPCB01J20/06B01J20/28059B01J20/28061C01G45/02B01J37/10B01J23/8892B01D53/02B01D53/86C02F1/281C02F1/725C02F1/78C02F2101/16C02F2101/101C02F2101/30B01D2257/302B01D2257/40B01D2257/708C01P2002/72C01P2004/03C01P2004/64B01J35/40B01J35/51B01J35/615
Inventor 朱荣淑张婉剑朱满玉
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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