Copper oxide-tin oxide core-shell nanowire structure-based gas sensitive nano material, preparation process and application thereof

A core-shell nanotechnology and preparation technology, which is applied in the field of semiconductor nanomaterial preparation, can solve the problems of weakened sensor sensitivity and lifespan, incompatibility with biocompatibility, high preparation cost, etc., to achieve improved gas-sensing performance, excellent gas-sensing performance, preparation high efficiency effect

Inactive Publication Date: 2019-03-08
FUDAN UNIV
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Problems solved by technology

However, considering that the preparation cost of noble metal doping is quite high, the sensitivity and lifespan of the sensor will be severely weakened by poisoning. At the same time, noble metals are highly toxic and cannot be biocompatible, and their applications are significantly limited.

Method used

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  • Copper oxide-tin oxide core-shell nanowire structure-based gas sensitive nano material, preparation process and application thereof
  • Copper oxide-tin oxide core-shell nanowire structure-based gas sensitive nano material, preparation process and application thereof
  • Copper oxide-tin oxide core-shell nanowire structure-based gas sensitive nano material, preparation process and application thereof

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Embodiment 1

[0035] a based on p - n The preparation process of the gas-sensitive nanomaterial with copper oxide-tin oxide core-shell nanowire structure comprises the following steps:

[0036] (1) Take a piece of orange-red foam copper with a size of 1.5 cm × 3.5 cm as the substrate and source material, soak it in absolute ethanol and deionized water for 10 min, and then blow it dry with high-purity nitrogen at room temperature.

[0037] (2) Prepare NaOH concentration to be 1.25 mol / L, (NH 4 ) 2 S 2 o 8 The mixed solution with a concentration of 0.0625 mol / L was used as the reaction solution.

[0038] (3) Soak the cleaned and dried copper foam vertically in the above reaction solution for 10 min, take it out, and then ultrasonically clean it with absolute ethanol and deionized water for 3 times, each time for 3 min. After drying with high-purity nitrogen, light blue Cu(OH) with an average length of 8 μm and an average diameter of 132 nm grew on the surface of the foamed copper. 2 na...

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Abstract

The invention discloses a copper oxide-tin oxide core-shell nanowire structure-based gas sensitive nano material, a preparation process and application thereof. A copper oxide-tin oxide core-shell nanowire is prepared by adopting a chemical solution method with extremely simple synthesis conditions, and in combination with an atomic layer deposition technology of a shell layer, a copper oxide / tinoxide core-shell nanowire is obtained. Compared with the existing preparation process, the preparation process has the advantages of high reproducibility, high yield, high preparation efficiency, large-scale production and the like. The p-n heterojunction-based core-shell structure constructed by the preparation process has substantially improved sensitivity when applied to gas sensing, and the response time and recovery time are substantially reduced, thereby showing more excellent gas sensitive performance. The gas sensitive nano material disclosed by the invention can detect trace organic volatile gas and has excellent selectivity to formaldehyde gas; a solid technical support is provided for developing a gas sensor with high sensitivity and high stability in the gas monitoring field.

Description

technical field [0001] The invention relates to the technical field of semiconductor nanomaterial preparation, and specifically refers to a gas-sensitive nanomaterial based on a copper oxide-tin oxide core-shell nanowire structure with high specific surface area, high sensitivity and excellent stability, a preparation process and its application. Background technique [0002] In recent years, resistive gas sensors based on semiconductor nanomaterials have received great attention and have been widely used in various fields such as gas leak alarm, environmental gas monitoring, and industrial gas analysis. The development of various new gas sensors based on metal oxide semiconductor materials with high specific surface area, excellent gas adsorption capacity and high carrier mobility has become a current research hotspot. Among various metal oxide semiconductor materials, copper oxide (CuO) is an excellent p type multifunctional semiconductor materials, which have been widely...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G3/02C01G19/02B82Y40/00G01N27/12
CPCG01N27/127B82Y40/00C01G3/02C01G19/02C01P2004/16C01P2004/03C01P2004/01
Inventor 卢红亮朱立远袁凯平张卫
Owner FUDAN UNIV
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