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Preparation of self-support ultrathin two-dimensional efflorescent manganese oxide nanosheets and application of self-support ultrathin two-dimensional efflorescent manganese oxide nanosheets

A manganese oxide, self-supporting technology, applied in the field of materials, can solve problems such as organic pollution, and achieve the effects of rapid degradation, high activity and wide pH range

Inactive Publication Date: 2019-12-31
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to address the deficiencies of the prior art, to provide a preparation of self-supporting ultra-thin two-dimensional flower-like manganese oxide nanosheets, which does not require a template agent, and is synthesized in one step by a simple co-precipitation method, enriching the two-dimensional The design of the self-supporting morphology structure of nanomaterials avoids the problem of agglomeration; and can form low oxygen vacancies, lock lattice oxygen, and generate strong oxidative free radicals and release highly oxidative active lattice oxygen during the degradation process , efficiently catalyze the degradation of organic pollutants such as phenols, antibiotics, dyes, ascorbic acid, and solve the pollution problem of some organic substances

Method used

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  • Preparation of self-support ultrathin two-dimensional efflorescent manganese oxide nanosheets and application of self-support ultrathin two-dimensional efflorescent manganese oxide nanosheets
  • Preparation of self-support ultrathin two-dimensional efflorescent manganese oxide nanosheets and application of self-support ultrathin two-dimensional efflorescent manganese oxide nanosheets
  • Preparation of self-support ultrathin two-dimensional efflorescent manganese oxide nanosheets and application of self-support ultrathin two-dimensional efflorescent manganese oxide nanosheets

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Embodiment 1

[0037] A method for preparing self-supporting ultra-thin two-dimensional flower-shaped manganese oxide nanosheets, which uses potassium ferrocyanide, potassium permanganate and dilute hydrochloric acid as raw materials, and prepares manganese oxide through a co-precipitation method. Include the following steps:

[0038] 1) Put potassium ferrocyanide into a beaker, then add dilute hydrochloric acid to obtain a mixed system, stir the mixed system until the raw materials are completely dissolved, and obtain mixed solution A;

[0039] 2) Add potassium permanganate to mixed solution A to obtain mixed solution B;

[0040] 3) Stir the mixed solution B magnetically for 10 minutes and ultrasonically for 10 minutes;

[0041] 4) The mixed solution B was left at room temperature for 24 h; the reaction product was washed by centrifugation and dried at 60 °C for 12 h to obtain self-supporting ultrathin two-dimensional flower-like manganese oxide nanosheets.

[0042] In the above-mentioned p...

Embodiment 2

[0044] A method for preparing self-supporting ultra-thin two-dimensional flower-shaped manganese oxide nanosheets, which uses potassium ferrocyanide, potassium permanganate and dilute hydrochloric acid as raw materials, and prepares manganese oxide through a co-precipitation method. Include the following steps:

[0045] 1) Put potassium ferrocyanide into a beaker, then add dilute hydrochloric acid to obtain a mixed system, stir the mixed system until the raw materials are completely dissolved, and obtain mixed solution A;

[0046] 2) Add potassium permanganate to mixed solution A to obtain mixed solution B;

[0047] 3) Stir the mixed solution B magnetically for 10 minutes and ultrasonically for 10 minutes;

[0048] 4) The mixed solution B was left at room temperature for 24 h; the reaction product was washed by centrifugation and dried at 60 °C for 12 h to obtain self-supporting ultrathin two-dimensional flower-like manganese oxide nanosheets.

[0049] In the above-mentioned...

Embodiment 3

[0051] A method for preparing self-supporting ultra-thin two-dimensional flower-shaped manganese oxide nanosheets, which uses potassium ferrocyanide, potassium permanganate and dilute hydrochloric acid as raw materials, and prepares manganese oxide through a co-precipitation method. Include the following steps:

[0052] 1) Put potassium ferrocyanide into a beaker, then add dilute hydrochloric acid to obtain a mixed system, stir the mixed system until the raw materials are completely dissolved, and obtain mixed solution A;

[0053] 2) Add potassium permanganate to mixed solution A to obtain mixed solution B;

[0054] 3) Stir the mixed solution B magnetically for 10 minutes and ultrasonically for 10 minutes;

[0055] 4) The mixed solution B was left at room temperature for 24 h; the reaction product was washed by centrifugation and dried at 60 °C for 12 h to obtain self-supporting ultrathin two-dimensional flower-like manganese oxide nanosheets.

[0056] In the above-mentioned...

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Abstract

The invention discloses preparation of self-support ultrathin two-dimensional efflorescent manganese oxide nanosheets and application of the self-support ultrathin two-dimensional efflorescent manganese oxide nanosheets in efficient wastewater purification. A 2D Delta-MnO2 nano-material is prepared from potassium ferrocyanide, potassium permanganate and diluted hydrochloric acid. The nano-materialcan effectively produce hydroxyl radicals, superoxide radicals and singlet oxygen radicals, releasing of lattice oxygen with high oxidation activity is accompanied, and then, the nano-material can rapidly degrade phenol, bisphenol A, methyl orange, acid blue, Coomassie brilliant blue, rhodamine b, ciprofloxacin, norfloxacin, enrofloxacin, ascorbic acid and the like in a wide pH value range of 2 to 11, wherein the degradation of the bisphenol A can reach a second level. An efflorescent self-support structure is formed by two-dimensional nanosheets through self assembly, and thus, a new way isopened up for fine adjustment on structures and properties of two-dimensional materials; and the preparation method is simple in operation, short in cycle and high in economic benefit, thereby being applicable to large-scale production.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to the preparation of a self-supporting ultra-thin two-dimensional flower-shaped manganese oxide nanosheet and its application to efficient wastewater purification. Background technique [0002] Wastewater containing phenols, antibiotics, dyes, and vitamins (ascorbic acid) is harmful and has a wide range of pollution. Its degradation treatment is a long-term environmental protection problem to be solved. There are many common methods for treating wastewater. Among them, the Fenton catalytic oxidation method has been widely valued because of the advantages of simple equipment, easy operation, wide application range, fast and efficient reaction, etc. With the development of related technologies, its scope of application continues to expand, and its application prospects are generally promising. However, the classical Fenton catalyst is 2 o 2 "Mainly, the pH response ...

Claims

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Application Information

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IPC IPC(8): C01G45/02B82Y40/00B01J23/34C02F1/72C02F101/30
CPCB01J23/34B82Y40/00C01G45/02C01P2002/72C01P2002/85C01P2004/03C01P2004/04C01P2004/22C02F1/725C02F2101/30
Inventor 庄赞勇陈木清于岩陈雅文
Owner FUZHOU UNIV
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