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Thin-layer MXene/hexagonal crystal phase molybdenum disulfide composite material, and preparation method and application thereof

A technology of hexagonal crystal phase and molybdenum disulfide, applied in molybdenum sulfide, nanotechnology for materials and surface science, analytical materials, etc., can solve the problems of long detection time, high detection limit, high cost, etc., and achieve high gas sensitivity Sex and response speed, simple operation, easy to promote the effect

Active Publication Date: 2021-07-27
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the existing MoS 2 or MoS 2 The composite material is used as a sensitive material to prepare a gas sensor for detecting NO 2 low sensitivity, high detection limit, poor recovery and the need to use other auxiliary means for testing, high cost, and long detection time, and provide a thin-layer MXene / hexagonal phase molybdenum disulfide composite material and its preparation method and application

Method used

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  • Thin-layer MXene/hexagonal crystal phase molybdenum disulfide composite material, and preparation method and application thereof
  • Thin-layer MXene/hexagonal crystal phase molybdenum disulfide composite material, and preparation method and application thereof
  • Thin-layer MXene/hexagonal crystal phase molybdenum disulfide composite material, and preparation method and application thereof

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specific Embodiment approach 1

[0037] Embodiment 1: In this embodiment, a thin-layer MXene / hexagonal molybdenum disulfide composite material is prepared from two-dimensional transition metal carbides, molybdenum-containing compounds, sulfur-containing compounds, weak acids and surfactants as raw materials.

specific Embodiment approach 2

[0038] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the two-dimensional transition metal carbide is titanium carbide, calcium carbide, chromium carbide, tantalum carbide, vanadium carbide, zirconium carbide, tungsten carbide or molybdenum carbide ; The molybdenum-containing compound is ammonium molybdate, sodium molybdate or ammonium tetrathiomolybdate. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0039] Specific embodiment three: the differences between this embodiment and specific embodiment one or two are: the sulfur-containing compound is thiourea or thioacetamide; the weak acid is oxalic acid, citric acid or phosphoric acid; the The preferred surfactant is sodium benzenesulfonate, ethylene oxide or pyrrolidone. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a thin-layer MXene / hexagonal crystal phase molybdenum disulfide composite material, and a preparation method and application thereof, and relates to an MXene composite material, and a preparation method and application thereof. The invention aims to solve the problems of low sensitivity, high detection limit, poor restorability, high cost and long detection time due to the need of other auxiliary means for testing when a gas sensitive element prepared from the existing MoS2 or MoS2 composite material as a sensitive material is used for detecting NO2. The thin-layer MXene / hexagonal crystal phase molybdenum disulfide composite material is prepared from two-dimensional transition metal carbide, a molybdenum-containing compound, a sulfur-containing compound, weak acid and a surfactant. The method comprises the following steps: 1, preparing thin-layer MXene; 2, compounding; and 3, post-processing. The thin-layer MXene / hexagonal crystal phase molybdenum disulfide composite material is used as a sensitive material to prepare the gas sensitive element, and the gas sensitive element is used for detecting low-concentration NO2 in air at room temperature.

Description

technical field [0001] The invention relates to an MXene composite material and its preparation method and application. Background technique [0002] The earth's atmospheric environment is composed of various chemical elements, gases and dust particles, the gas components include N 2 , O 2 , CO, CO 2 , NO 2 , NH 3 and many more. Among these gases, the O present in the environment 2 It is beneficial to organisms, and some gases, such as NO 2 , CO is poisonous and harmful. Therefore, real-time monitoring of atmospheric NO 2 content is of great significance. [0003] At present, TMDs have been proved to be a promising method for detecting NO 2 Gas sensor. The gas sensor based on molybdenum disulfide can detect the toxic and harmful gas NO at room temperature 2 There are different degrees of response, and the advantage of reducing the sensor's operating temperature and power consumption greatly enhances its practicability. However, using pure molybdenum disulfide as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G39/06C01B32/921G01N27/12B82Y40/00B82Y30/00B82Y15/00
CPCC01G39/06C01B32/921G01N27/127B82Y40/00B82Y30/00B82Y15/00C01P2004/80C01P2004/03C01P2004/04C01P2002/72Y02E60/10
Inventor 史克英吕贺刘茁
Owner HEILONGJIANG UNIV
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