Molybdenum selenide nanosheet/nitrogen-doped carbon core-shell-structure composite material and preparation method and application thereof

A nitrogen-doped carbon, composite material technology, applied in catalyst activation/preparation, chemical instruments and methods, nanotechnology, etc., can solve the problems of limiting molybdenum selenide, poor electrical conductivity, etc., achieving good synergistic enhancement effect and excellent performance , the effect of large aspect ratio

Active Publication Date: 2018-04-24
DONGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to its own poor conductivity and limited active sites, the application of molybdenum selenide in optoelectronics, new energy, biosensing and other fields is greatly limited, and the single-functional molybdenum selenide has been completely unable to meet the needs, so It is particularly necessary to develop a preparation method based on molybdenum selenide composite multifunctional nanomaterials

Method used

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  • Molybdenum selenide nanosheet/nitrogen-doped carbon core-shell-structure composite material and preparation method and application thereof
  • Molybdenum selenide nanosheet/nitrogen-doped carbon core-shell-structure composite material and preparation method and application thereof
  • Molybdenum selenide nanosheet/nitrogen-doped carbon core-shell-structure composite material and preparation method and application thereof

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Embodiment 1

[0031] (1) Add 1.21g sodium molybdate and 0.6g sodium chloride to 60mL deionized water to obtain a solution, continue stirring for 10min to obtain a uniform dispersion, add 3mol / L hydrochloric acid solution to adjust the pH value to 1, and transfer to a hydrothermal kettle The hydrothermal reaction was carried out in an oven, the reaction temperature was 180°C, and the reaction time was 24 hours. After the reaction kettle was cooled to room temperature, the obtained dispersion was subjected to suction filtration to separate the light blue precipitate, and the obtained solid was washed with deionized water. , dried in an oven at 60° C. for 24 hours to obtain molybdenum trioxide nanobelts.

[0032] (2) Add 40 mg of molybdenum trioxide nanobelts in step (1) to a 250 mL flask, add 80 ml of deionized water, stir to make molybdenum trioxide evenly dispersed in deionized water to obtain a dispersion, and use a pipette to measure 200 μL of pyrrole (0.00288mol) was added to the above f...

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Abstract

The invention relates to a molybdenum selenide nanosheet / nitrogen-doped carbon core-shell-structure composite material which is of a hollow structure. A molybdenum selenide nanosheet serves as a core,and a nitrogen-doped carbon layer of a hollow nanobelt structure serves as a shell. A preparation method of the composite material includes: synthesizing a molybdenum trioxide nanobelt; synthesizinga molybdenum trioxide / polypyrrole binary composite material; synthesizing a molybdenum selenide / polypyrrole core-shell-structure binary composite material; synthesizing the molybdenum selenide nanosheet / nitrogen-doped carbon core-shell-structure composite material. The composite material can be used as a visible light catalyst, an electrocatalyst, a nano / lithium ion anode material and a light-emitting transistor material. The composite material overcomes the defect that a molybdenum selenide body material is low in activity, and instability of molybdenum selenide due to size expansion when inuse is relieved effectively. The preparation method is simple, easy to operate, environment-friendly, low in cost and suitable for industrial production.

Description

technical field [0001] The invention belongs to the field of transition metal compound nanomaterials, in particular to a molybdenum selenide nanosheet / nitrogen-doped carbon core-shell composite material and its preparation method and application. Background technique [0002] As a typical representative of transition metal compound nanomaterials, molybdenum selenide belongs to the hexagonal crystal system and has a two-dimensional sheet structure similar to a sandwich, and the layers are combined by weak van der Waals forces. Adjacent molecular layers can slide each other through intermolecular forces, so they have a low friction coefficient and are often used as solid lubricants; each molybdenum atom in molybdenum selenide is surrounded by six selenium atoms, which is in the shape of a triangular prism. It has large surface area, high surface activity and excellent catalytic activity. It is widely used as hydrodesulfurization catalyst and wastewater treatment catalyst in pe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/02C09K11/88B01J27/24B01J37/10B01J37/08H01M4/36H01M4/58H01M4/62B82Y30/00B82Y40/00
CPCB01J27/24B01J35/004B01J37/082B01J37/10B82Y30/00B82Y40/00C09K11/02C09K11/881H01M4/362H01M4/581H01M4/625H01M4/628Y02E60/10
Inventor 张超刘颖刘天西李乐刘思良王开杨静
Owner DONGHUA UNIV
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