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Graphene/MoS2 heterojunction modified graphite felt electrode material and application thereof

An electrode material and heterojunction technology, which is applied in the direction of material analysis, material analysis, and material electrochemical variables through electromagnetic means, can solve the problems of low catalytic efficiency and achieve good catalytic selectivity, improved electrical conductivity, and electronic conduction. high efficiency effect

Pending Publication Date: 2021-02-05
清芯未来(北京)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The invention overcomes the shortcoming of low catalytic efficiency of existing electrocatalysts and provides a graphene / MoS 2 Heterojunction Modified Graphite Felt Electrode Material

Method used

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  • Graphene/MoS2 heterojunction modified graphite felt electrode material and application thereof
  • Graphene/MoS2 heterojunction modified graphite felt electrode material and application thereof
  • Graphene/MoS2 heterojunction modified graphite felt electrode material and application thereof

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Embodiment 1

[0053] Graphene / MoS of the present embodiment 2 The preparation method of the graphite felt electrode material modified by heterojunction, the preparation steps are as follows:

[0054] (1) Will (NH 4 ) 6 Mo 7 o 24 4H 2 O and thiourea (CS(NH 2 ) 2 ) successively dissolves in appropriate amount of water, then adds graphene oxide aqueous solution in above-mentioned aqueous solution, obtains mixed solution after mixing; Ammonium paramolybdate molar concentration is 5 * 10 in the mixed solution -3mol L -1 , the molar ratio of thiourea / ammonium paramolybdate was 30:1, and the concentration of graphene oxide was 0.8 mg·mL -1 , transfer the mixed solution into a closed reaction vessel, and place the closed reaction vessel in an oven or muffle furnace for hydrothermal synthesis reaction. The hydrothermal reaction temperature is 220°C, and the reaction time is 24 h. After the reaction, dry to obtain nano heterojunction precursors;

[0055] (2) Anneal the precursor obtained in...

Embodiment 2

[0064] Graphene / MoS of the present embodiment 2 The preparation method of the graphite felt electrode modified by heterojunction, the preparation steps are as follows:

[0065] (1) Will (NH 4 ) 6 Mo 7 o 24 4H 2 O and thiourea (CS(NH 2 ) 2 ) successively dissolved in appropriate amount of water, then add graphene oxide aqueous solution in above-mentioned aqueous solution, obtain mixed solution after mixing evenly; Ammonium molybdate molar concentration is 4 * 10 in the mixed solution -3 mol L -1 , the molar ratio of thiourea / ammonium molybdate was 29:1, and the concentration of graphene oxide was 0.7 mg·mL -1 , transfer the mixed solution to a closed reaction vessel, and place the closed reaction vessel in an oven or muffle furnace for hydrothermal synthesis reaction. The hydrothermal reaction temperature is 200°C, the reaction time is 20 h, and the reaction is dried to obtain nano heterojunction precursors;

[0066] (2) Anneal the precursor obtained in step (1) in a...

Embodiment 3

[0070] Graphene / MoS of the present embodiment 2 The preparation method of the graphite felt electrode modified by heterojunction, the preparation steps are as follows:

[0071] (1) ammonium paramolybdate ((NH 4 ) 6 Mo 7 o 24 4H 2 O) and thiourea (CS(NH 2 ) 2 ) were successively dissolved in deionized water, and then an aqueous solution of graphene oxide was added to the aqueous solution, and mixed evenly to obtain a mixed solution. The range of molar concentration of ammonium paramolybdate in the mixed solution is 6×10 -3 mol L -1 , the molar ratio of thiourea / ammonium paramolybdate is 40:1, and the concentration range of graphene oxide is 0.9 mg·mL -1 .

[0072] Transfer the mixed solution to an airtight reaction vessel, and place the airtight reaction vessel in an oven or muffle furnace for hydrothermal synthesis reaction. The hydrothermal reaction temperature is 250°C, and the reaction time is 50h. After the reaction, filter, wash and dry Obtain nano-heterojuncti...

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Abstract

The invention provides a graphene / MoS2 heterojunction modified graphite felt electrode material and an application thereof; the electrode comprises a conductive substrate and a catalyst loaded on thesubstrate, the conductive substrate is a graphite felt, and the catalyst is a nano graphene / MoS2 heterojunction. According to the electrode material, the high electrical conductivity, porosity and large specific surface area of the graphite felt and the oxygen reduction activity and strong hole adsorption activity of two electron paths of the catalyst are fully utilized, so that the graphite feltand the catalyst play a synergistic role. The electrode material belongs to the field of materials, the technological process is short, the operation method is simple, and a prepared graphene / MoS2 heterojunction modified graphite felt electrode can be applied to related fields such as electro-catalysis and electrochemical sensing.

Description

technical field [0001] The invention belongs to the technical field of electrode materials and relates to a graphene / MoS 2 Heterojunction modified graphite felt electrode material and its application. Background technique [0002] With the unprecedented development in the field of electrocatalysis, the use of electrochemical methods to catalyze oxidation or reduction with multiple electrons is an environmentally friendly technology. Electrocatalysis is a kind of catalysis that accelerates the reaction by charge transfer on the electrode-electrolyte interface. Its electrocatalytic sensing analysis technology has attracted people's attention because of its advantages of simple operation and high detection accuracy. Using this technology can not only degrade small organic molecules such as formic acid, formaldehyde, and hydrogen peroxide in the environment, but also detect the real-time concentration of small molecules in the environment. Healthy living has a positive impact....

Claims

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Application Information

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IPC IPC(8): B01J27/051G01N27/30
CPCB01J27/051G01N27/308B01J35/33
Inventor 罗扬吴应红郑皓云曹友錋张玲玲谭美娟朱迪炜
Owner 清芯未来(北京)科技有限公司
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