Flower-cluster-shaped Fe3O4@MnO2 as well as preparation method and application thereof

A flower cluster and hydrothermal reaction technology, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problems of increased experimental cycle, increased experimental consumables, cumbersome and complicated experimental steps, etc. Achieve the effect of uniform size, complete shape and simplified synthesis process

Active Publication Date: 2020-08-07
SHANDONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the inventors found that due to the preparatory work of coating the carbon layer in the early stage, the experimental steps are more cumbersome and complicated, the experimental period is correspondingly increased, and some experimental consumables are increased.

Method used

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  • Flower-cluster-shaped Fe3O4@MnO2 as well as preparation method and application thereof
  • Flower-cluster-shaped Fe3O4@MnO2 as well as preparation method and application thereof
  • Flower-cluster-shaped Fe3O4@MnO2 as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0034] A flower cluster Fe 3 o 4 @MnO 2 The preparation method comprises the steps of:

[0035] (1) Synthesis of ferric oxide: weigh 2.78g FeSO 4 ·7H 2 O and 1.5g PVP were added to 100ml deionized water, then added 0.8g NaOH and stirred evenly, then heated to 70°C in a water bath under stirring conditions and kept for 2 hours. After the reaction was completed, the product was taken out and centrifuged to obtain solid ferric oxide. Wash it with deionized water and absolute ethanol several times, and then dry it in a vacuum oven at 55°C to obtain it.

[0036] (2) Fe 3 o 4 @MnO 2 Synthesis of: Weigh 0.2g of Fe synthesized in this embodiment 3 o 4 Add 1.5803g of potassium permanganate to 70ml of deionized water and stir evenly, then transfer the mixed solution to a 100ml hydrothermal reaction kettle and add 0.4ml of absolute ethanol at the same time, react at 160°C for 12 hours, and cool naturally after the reaction After reaching room temperature, the solution was taken...

no. 2 approach

[0041] A flower cluster Fe 3 o 4 @MnO 2 The preparation method comprises the steps of:

[0042] (1) Synthesis of ferric oxide: weigh 2.78g FeSO 4 ·7H 2 O and 1.5g PVP were added to 100ml deionized water, then added 0.8g NaOH and stirred evenly, then heated to 70°C in a water bath under stirring conditions and kept for 2 hours. After the reaction was completed, the product was taken out and centrifuged to obtain solid ferric oxide. Wash it with deionized water and absolute ethanol several times, and then dry it in a vacuum oven at 55°C to obtain it.

[0043] (2) Fe 3 o 4 @MnO 2 Synthesis of: Weigh 0.2g of Fe synthesized in this embodiment 3 o 4 Add 1.5803g of potassium permanganate to 70ml of deionized water and stir evenly, then transfer the mixed solution to a 100ml hydrothermal reaction kettle and add 0.2ml of absolute ethanol at the same time, react at 160°C for 12 hours, and cool naturally after the reaction After reaching room temperature, the solution was taken...

no. 3 approach

[0046] A flower cluster Fe 3 o 4 @MnO 2 The preparation method comprises the steps of:

[0047] (1) Synthesis of ferric oxide: weigh 2.78g FeSO 4 ·7H 2 O and 1.5g PVP were added to 100ml deionized water, then added 0.8g NaOH and stirred evenly, then heated to 70°C in a water bath under stirring conditions and kept for 2 hours. After the reaction was completed, the product was taken out and centrifuged to obtain solid ferric oxide. Wash it with deionized water and absolute ethanol several times, and then dry it in a vacuum oven at 55°C to obtain it.

[0048] (2) Fe 3 o 4 @MnO 2 Synthesis of: Weigh 0.2g of Fe synthesized in this embodiment 3 o 4 Add 1.5803g of potassium permanganate to 70ml of deionized water and stir evenly, then transfer the mixed solution to a 100ml hydrothermal reaction kettle and add 0.6ml of absolute ethanol at the same time, react at 160°C for 12 hours, and cool naturally after the reaction After reaching room temperature, the solution was taken...

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Abstract

The invention relates to the technical field of environment-friendly catalysts, in particular to flower-cluster-shaped Fe3O4@MnO2 as well as a preparation method and application thereof. According tothe method, ferroferric oxide is used as a precursor and potassium permanganate and absolute ethyl alcohol are used as raw materials, so that flower-cluster-shaped Fe3O4@MnO2 is directly synthesized through a hydrothermal method. According to the preparation method, the absolute ethyl alcohol, which is used as a carbon source, and potassium permanganate are subjected to a redox reaction to generate manganese dioxide, and meanwhile hierarchical manganese dioxide nanosheets are generated, wherein the product has complete appearance and uniform size; the surface of the ferroferric oxide core doesnot need to be coated with a carbon layer in advance, a product with an obvious core-shell structure is synthesized, and the synthesis process is effectively simplified.

Description

technical field [0001] The invention relates to the technical field of environmental protection catalysts, in particular to a flower cluster Fe 3 o 4 @MnO 2 and its preparation method and application. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Manganese dioxide, a transition metal oxide, has attracted widespread attention due to its excellent performance in catalysts and other fields. However, since manganese dioxide tends to agglomerate in aqueous solution to form a fine particle system, which leads to a drastic reduction in surface area, available active sites, and catalytic efficiency, reducing its use efficiency, in order to solve the problem of manganese diox...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01J37/10B01J37/16C02F1/00
CPCB01J23/8892B01J37/10B01J37/16C02F1/00
Inventor 原晓波刘继健马宇昕宋婧怡魏荟荟任彤彤
Owner SHANDONG NORMAL UNIV
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