Orderly arranged In2O3 nanofibers and application of same in preparation of ultra-fast response alcohol sensor

A technology of orderly arrangement of nanofibers, applied in the application field of preparing ultra-fast response alcohol semiconductor sensors, can solve the problems of long response recovery time, etc., and achieve the effects of low production cost, simple preparation steps and high yield

Inactive Publication Date: 2011-06-01
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The gas sensor developed with this material has ultra-fast response and recovery characteristics to alcohol gas, which solves the shortcoming of long response and recovery time of traditional commercially available alcohol sensors, and is expected to become a very promising alcohol sensor

Method used

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  • Orderly arranged In2O3 nanofibers and application of same in preparation of ultra-fast response alcohol sensor
  • Orderly arranged In2O3 nanofibers and application of same in preparation of ultra-fast response alcohol sensor
  • Orderly arranged In2O3 nanofibers and application of same in preparation of ultra-fast response alcohol sensor

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Embodiment 1

[0029] 1. In a 50ml Erlenmeyer flask, dissolve 1g of indium nitrate in 10ml of dimethylformamide solvent, seal the bottle with a parafilm and stir at room temperature for 20min to dissolve completely. Add 2 g of polyvinylpyrrolidone to the above solution, continue to seal and stir at room temperature for 10 h to obtain a spinning precursor. Put the precursor solution into the spinneret of the electrospinning equipment, pass the copper wire connected to the high-voltage end into the precursor solution, use parallel permanent magnets as cathodes, and the distance between the permanent magnets is 2.5cm, and the spinneret and The distance between the permanent magnets was 15 cm, and the applied voltage was 18 kV for spinning. After 36 h of electrospinning, the In(NO 3 ) 3 / PVP composite nanofibers were loaded into a crucible and calcined in a muffle furnace at 600°C for 3h at a temperature gradient of 2°C / min. 2 o 3 Nanofibers.

[0030] 2. Arrange the In orderly 2 o 3 The n...

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Abstract

The invention belongs to the technical field of preparation of one-dimensional metal oxide nano-materials and semiconductor gas sensors therefrom, in particular relates to orderly arranged In2O3 nanofibers and application of same in preparation of an ultra-fast response alcohol semiconductor sensor. The process for preparing the orderly arranged In2O3 nanofibers comprises the following steps of: preparing a precursor solution from soluble nitrate, high polymer materials and a solvent; preparing orderly arranged composite nanofibers with a magnetic-field-induced electrostatic spinning technology; and performing high-temperature sintering to remove an organic high polymer template and further obtain the orderly arranged In(NO3)3 nanofibers. The alcohol gas sensor prepared from the orderly arranged In(NO3)3 nanofibers and a planar alumina substrate structure has the advantages that: the response time of the alcohol gas sensor to alcohol gas at the working temperature of 275 DEG C is 0.4 s, and the recovery time is 3 s; and the reversibility and repeatability of the sensor are good and far superior to the traditional alcohol sensor made of nano-powder materials of the same type. In the invention, the advantages of simple process, low cost and high yield are achieved.

Description

technical field [0001] The invention belongs to the technical field of semiconductor gas sensors, in particular to an orderly arranged In 2 o 3 Nanofibers and their application in the preparation of ultrafast response alcohol semiconductor sensors. Background technique [0002] Alcohol semiconductor sensors currently on the market use the traditional SnO 2 , ZnO, Fe 2 o 3 、TiO 2 、WO 3 Nanoparticles are sensitive materials, and the specific surface area of ​​the material becomes smaller due to the clustering effect between particles, so the nanoparticle material sensor generally has the disadvantage of long response recovery time. [0003] Recent developments in micro- and nanotechnology have provided a platform for new materials, and much attention has been focused on the synthesis and application of one-dimensional structured nanomaterials, such as nanorods, nanowires, nanotubes, and nanobelts. In particular, quasi-one-dimensional (1D) metal oxide nanostructures have...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D1/02D01D5/00G01N27/00
Inventor 张彤范会涛贺媛徐秀娟王丽杰费腾
Owner JILIN UNIV
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