Preparation method and application of dodecahedral zinc oxide nano material

A zinc oxide nano and dodecahedron technology, applied in zinc oxide/zinc hydroxide, nanotechnology, analytical materials, etc., to achieve the effect of improving gas sensing sensitivity and structural stability

Active Publication Date: 2020-12-25
FUZHOU UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, there has been no report on the use of ZIF-8 as a precursor to calcinate dodecahedral zinc oxide, which is applied to acetone gas sensing under ultraviolet light.

Method used

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  • Preparation method and application of dodecahedral zinc oxide nano material
  • Preparation method and application of dodecahedral zinc oxide nano material
  • Preparation method and application of dodecahedral zinc oxide nano material

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Embodiment 1

[0035] (1) Dissolve 1.116 g of zinc nitrate hexahydrate in 60 mL of anhydrous methanol and stir for 5 min to obtain solution A;

[0036] (2) Dissolve 1.232 g of 2-methylimidazole in 60 mL of anhydrous methanol and stir for 5 min to obtain solution B;

[0037] (3) Add the B solution obtained in step (2) to the A solution obtained in step (1) at a rate of two seconds per drop using a separating funnel, and then continuously stir at 600 r / min at 25 °C for 24 h to carry out complexation reaction , after the reaction, the centrifuged white precipitate was washed three times with anhydrous methanol;

[0038] (4) Dry the white precipitate after washing in step (3) in a vacuum oven at 60 °C for 24 h. After drying, grind it with a mortar for 30 min. Under protection, the temperature was raised to 400 °C at 2 °C / min and calcined for 2 h, and then air was introduced to continue calcining for 2 h. The final powder obtained was the zinc oxide nanomaterial used to prepare the gas sensor. ...

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Abstract

The invention discloses a preparation method and application of a dodecahedral zinc oxide nano material. The preparation method specifically comprises the following steps of: carrying out complexationreaction on zinc nitrate hexahydrate and 2-methylimidazole to obtain a metal organic framework material (ZIF-8); washing the ZIF-8, carrying out vacuum drying, separately carrying out continuous high-temperature calcination in a tubular furnace under argon and air atmospheres to obtain a dodecahedral zinc oxide nano material; irradiating a nano semiconductor gas sensor prepared from the dodecahedral zinc oxide nano material by using an ultraviolet light source at a working temperature of 100-220 DEG C for acetone gas detection. The gas sensor prepared from the dodecahedral zinc oxide nano material has a remarkable enhancing effect on the gas sensitivity of acetone gas under the irradiation of an ultraviolet light source and has the characteristics of good selectivity, strong stability andthe like; the nano semiconductor gas sensor has a photo-assisted sensibilization characteristic and a wide application prospect.

Description

technical field [0001] The invention specifically relates to a preparation method and application of a dodecahedral zinc oxide nanometer material. Background technique [0002] As a widely studied metal oxide, ZnO has many excellent physical and chemical properties, such as high stability, antibacterial properties, non-toxicity, and high excitation binding energy. The three-dimensional, porous structure of zinc oxide has better gas-sensing performance than one-dimensional and two-dimensional due to its larger specific surface area and active sites. At the same time, zinc oxide, as a typical semiconductor material, produces excellent photocatalytic activity under ultraviolet light, and has a high research prospect in the field of gas sensing. [0003] Acetone (CH 3 COCH 3 ) is an organic solvent and flammable gas, which is widely used in many fields of industrial production, and is volatile and toxic at the same time. When the concentration of acetone in the environment r...

Claims

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Application Information

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IPC IPC(8): C01G9/02B82Y40/00G01N27/12
CPCB82Y40/00C01G9/02C01P2004/30C01P2004/64C01P2006/12G01N27/127
Inventor 潘海波杨世超李超超张志鹏林星沈水发
Owner FUZHOU UNIVERSITY
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