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Preparation method of polyaniline/graphene/manganese dioxide ternary composite hollow microspheres

A manganese dioxide and ternary composite technology, which is applied in the field of preparation of polyaniline/graphene/manganese dioxide ternary composite hollow microspheres, can solve the problems that the specific capacitance cannot meet the expected requirements and the like

Active Publication Date: 2021-06-08
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, although graphene composites retain the excellent properties of graphene to a certain extent, in practical applications, the specific capacitance often fails to meet the expected requirements.

Method used

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  • Preparation method of polyaniline/graphene/manganese dioxide ternary composite hollow microspheres
  • Preparation method of polyaniline/graphene/manganese dioxide ternary composite hollow microspheres
  • Preparation method of polyaniline/graphene/manganese dioxide ternary composite hollow microspheres

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Embodiment 1

[0031] A preparation method of polyaniline / graphene / manganese dioxide ternary composite hollow microspheres, said preparation method comprising the steps of:

[0032] (1) Preparation of manganese dioxide-modified graphene oxide (MnO 2 / GR);

[0033] 100mg graphene oxide was dispersed in 50mL 20vol% aqueous ethanol solution to form a 2mg / mL graphene oxide dispersion; 500mg MnSO 4 ·H 2 O with 500 mg KMnO 4 Dissolve in 5mL water respectively, MnSO 4 ·H 2 O aqueous solution was added dropwise into the graphene oxide dispersion, and after an interval of 60 min, the KMnO 4 The aqueous solution was added dropwise into the graphene oxide dispersion, the reaction was continued at room temperature for 60 minutes, and finally manganese dioxide-modified graphene oxide was obtained by suction filtration and washing;

[0034] (2) Prepare oil-in-water Pickering emulsion with manganese dioxide-modified graphene oxide as particle emulsifier;

[0035] The manganese dioxide modified graph...

Embodiment 2

[0038] A preparation method of polyaniline / graphene / manganese dioxide ternary composite hollow microspheres, said preparation method comprising the steps of:

[0039] (1) Preparation of manganese dioxide-modified graphene oxide (MnO 2 / GR);

[0040] Disperse 100mg graphene oxide in 40mL 50vol% ethanol aqueous solution, form the graphene oxide dispersion liquid of 2.5mg / mL; Dissolve 10mg MnSO 4 ·H 2 O with 10 mg KMnO 4 Dissolve in 5mL water respectively, MnSO 4 ·H 2 O aqueous solution was added dropwise into the graphene oxide dispersion, and after an interval of 20 min, the KMnO 4 The aqueous solution was added dropwise into the graphene oxide dispersion, the reaction was continued at room temperature for 20 minutes, and finally manganese dioxide-modified graphene oxide was obtained by suction filtration and washing;

[0041] (2) Prepare oil-in-water Pickering emulsion with manganese dioxide-modified graphene oxide as particle emulsifier;

[0042] The manganese dioxide ...

Embodiment 3

[0046] A preparation method of polyaniline / graphene / manganese dioxide ternary composite hollow microspheres, said preparation method comprising the steps of:

[0047] (1) Preparation of manganese dioxide-modified graphene oxide (MnO 2 / GR);

[0048] 100mg graphene oxide was dispersed in 20mL 30vol% ethanol aqueous solution to form a 5mg / mL graphene oxide dispersion; 78mg MnSO 4 ·H 2 O with 73mg KMnO 4 Dissolve in 5mL water respectively, MnSO 4 ·H 2 O aqueous solution was added dropwise into the graphene oxide dispersion, and after an interval of 30 min, the KMnO 4 The aqueous solution is added dropwise in the graphene oxide dispersion, and the reaction continues for 30 min at room temperature, and finally the graphene oxide modified by manganese dioxide is obtained through suction filtration and washing; the water contact angle and TGA of the obtained material and graphene oxide are respectively as follows: Figure 4 , Figure 5 shown by Figure 4 It can be seen that m...

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Abstract

The invention discloses a preparation method of polyaniline / graphene / manganese dioxide ternary composite hollow microspheres. The preparation method comprises the following steps: (1) preparing manganese dioxide modified graphene oxide; (2) preparing an oil-in-water type Pickering emulsion by taking the manganese dioxide modified graphene oxide as a particle emulsifier; and (3) preparing the polyaniline / graphene / manganese dioxide ternary composite hollow microspheres. The polyaniline / graphene / manganese dioxide composite hollow microspheres are prepared by utilizing a Pickering emulsion soft template method, taking manganese dioxide modified graphene oxide as a particle emulsifier, initiating aniline in an oil phase to polymerize, then removing the oil phase and performing electrochemical reduction. The method is simple in process and mild in process.

Description

technical field [0001] The invention relates to the technical field of preparation of graphene oxide composite materials, in particular to a preparation method of polyaniline / graphene / manganese dioxide ternary composite hollow microspheres. Background technique [0002] As a two-dimensional network structure composed of a single layer of carbon atoms, graphene has unique physical and chemical properties such as large specific surface area, stable mechanical properties, and excellent electrochemical properties. It is used in many fields such as supercapacitors, sensing, catalysis, and electromagnetic shielding. It has aroused extensive attention of researchers. However, due to the interlayer π-π interaction, graphene sheets are prone to stacking and agglomeration, which greatly reduces their specific surface area, which will greatly affect the actual performance of graphene materials in applications. [0003] Manganese dioxide has a very high theoretical specific capacitance...

Claims

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Application Information

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IPC IPC(8): C08G73/02C08K9/02C08K3/04C08K3/22C08J3/12C08L79/02
CPCC08G73/02C08J3/12C08J2379/02C08K3/22C08K9/02C08K2003/2255C08K3/042
Inventor 罗静王艺晨
Owner JIANGNAN UNIV
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