Molybdenum diselenide gas-sensitive sensing material as well as preparation and application thereof

A technology of molybdenum diselenide and gas-sensing materials, applied in the field of molybdenum diselenide nano-materials and its preparation, application, molybdenum diselenide gas-sensing sensing materials and its preparation, which can solve the problem of reserve limitation, widely used, accelerated sensors Electronic exchange with the test gas, etc., to achieve the effect of industrialization, high selectivity and stability, and enhanced chemical adsorption

Inactive Publication Date: 2020-07-31
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Noble metal nanoparticles such as gold, silver, and platinum are a class of unique chemical and physical properties that have been widely used in gas sensors because loading noble metals can improve the adsorption of gas molecules on the surface of semiconductor materials and accelerate the sensor and test Electronic exchange between gases, but the extremely high price and reserves of noble metals limit their wide application in gas sensors

Method used

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  • Molybdenum diselenide gas-sensitive sensing material as well as preparation and application thereof
  • Molybdenum diselenide gas-sensitive sensing material as well as preparation and application thereof
  • Molybdenum diselenide gas-sensitive sensing material as well as preparation and application thereof

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preparation example Construction

[0074] The present invention also provides a preparation method of molybdenum diselenide nanometer material, comprising the following steps:

[0075] A) After mixing molybdenum acetylacetonate and oleylamine, solution A is obtained;

[0076] After mixing dibenzyl diselenide and oleylamine, solution B is obtained;

[0077] B) After mixing the solution A and solution B obtained in the above steps again, and reacting under a protective atmosphere, the molybdenum diselenide nanomaterial is obtained.

[0078] In the present invention, the structure, selection and appearance of the product or raw material in the preparation method of the molybdenum diselenide nanomaterial, and its optimization principles, preferably the structure of the product or raw material corresponding to the aforementioned molybdenum diselenide nanomaterial , selection and shape, and their optimization principles may correspond to each other, and will not be repeated here.

[0079]In the present invention, s...

Embodiment 1

[0108] Weigh 0.6520g (2mmol) molybdenum acetylacetonate [MoO 2 (acac) 2 ] was dissolved in oleylamine with a volume of 10mL, and after ultrasonic treatment for 15 minutes to dissolve completely, it was marked as material liquid A; another 0.6800g (2mmol) dibenzyl diselenide [(PhCH 2 ) 2 Se 2 ], was dissolved in oleylamine with a volume of 10 mL, and was marked as material solution B after ultrasonic treatment for 15 minutes to completely dissolve.

[0109] Mix the above materials A and B, and carefully transfer them to the bottom of a 50mL three-neck flask, add a high-temperature magnet to stir, then pass in argon for 20 minutes to exhaust the air, and heat the reactant to 130°C for 30 minutes to remove moisture and Other low-boiling impurities. Through temperature programming, the temperature was raised to 240° C. at a rate of 10° C. per minute and reacted for 20 minutes. After the reaction was completed, it was naturally cooled to room temperature, and the product obtai...

Embodiment 2

[0134] Weigh 1.3040g (4mmol) molybdenum acetylacetonate [MoO 2 (acac) 2 ] was dissolved in oleylamine with a volume of 15mL, and after ultrasonic treatment for 18 minutes to dissolve completely, it was marked as material liquid A; another 1.3600g (4mmol) dibenzyl diselenide [(PhCH 2 ) 2 Se 2 ], dissolved in oleylamine with a volume of 15mL, and after ultrasonic treatment for 18 minutes to completely dissolve, it was marked as material solution B.

[0135] Mix the above materials A and B, and carefully transfer them to the bottom of an 80mL three-necked flask, add a high-temperature magnet to stir, then pass in argon for 25 minutes to exhaust the air, and heat the reactant to 140°C for 40 minutes to remove moisture and Other low-boiling impurities. Through temperature programming, the temperature was raised to 245° C. at a rate of 12° C. per minute and reacted for 25 minutes. After the reaction was completed, it was naturally cooled to room temperature, and the product obt...

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Abstract

The invention provides a molybdenum diselenide nano material. The molybdenum diselenide nano material has a nano flower structure formed by assembling molybdenum diselenide nano sheets. The MoSe2 nanomaterial with the specific morphology and the hierarchical porous structure, which is obtained by the invention, has the nano flower with the hierarchical porous structure, and the unique two-dimensional plane structure and three-dimensional porous structure of the nano flower greatly enhance chemical adsorption between the material and a target molecule and accelerate electron exchange between asubstrate and a gas molecule to be detected. The molybdenum diselenide nano material has high selectivity and stability for gas-sensitive detection of the gas to be detected; even if foreign gases such as formaldehyde, chlorobenzene, ethanol, acetone and toluene coexist in the gas to be detected, high-selectivity and high-sensitivity detection can still be performed on the gas to be detected, andthe result repeatability is high during continuous cyclic detection. The preparation method is simple, mild in condition and controllable in process, is beneficial to industrial implementation, and has a wide practical prospect.

Description

technical field [0001] The present invention relates to the technical field of preparation of two-dimensional transition metal sulfide gas-sensing sensing materials, relates to a molybdenum diselenide nanometer material and its preparation method and application, especially to a molybdenum diselenide gas-sensing sensing material and its preparation ,application. Background technique [0002] Since two scientists from the University of Manchester successfully stripped graphene in 2004, graphene has been favored for its excellent electrical, optical, mechanical and electrochemical properties. However, intrinsic graphene does not have a band gap, which severely limits its application in electronic and optoelectronic devices. Therefore, transition metal dichalcogenides TMD (MoS 2 、WSe 2 、TiS 2 、TaS 2 etc.) The study of nanomaterials came into being. In recent years, it has been found that when bulk transition metal dichalcogenides are transformed into two-dimensional nanosh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B19/04B82Y30/00B82Y40/00G01N27/12B82Y15/00
CPCB82Y15/00B82Y30/00B82Y40/00C01B19/007C01P2002/72C01P2002/82C01P2004/03C01P2004/04C01P2004/45C01P2004/50C01P2004/62G01N27/127
Inventor 江俊朱青罗毅李鑫李磊磊陈晓露汤乐
Owner UNIV OF SCI & TECH OF CHINA
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