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Heterogeneous gas-sensitive nano material based on cerium oxide particle modified copper oxide nanowire structure and preparation process and application thereof

A technology of copper oxide nanowires and nanomaterials, applied in nanotechnology for sensing, nanotechnology for materials and surface science, nanotechnology, etc., can solve problems such as damage to human health, corrosion, strong irritation, etc. , to achieve the effects of low cost, high preparation efficiency, and improved selectivity and consistency

Pending Publication Date: 2022-01-18
FUDAN UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, excessive hydrogen sulfide gas will have a strong irritant and corrosive effect on the human eye, respiratory system, and even the central nervous system, seriously damaging human health.

Method used

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  • Heterogeneous gas-sensitive nano material based on cerium oxide particle modified copper oxide nanowire structure and preparation process and application thereof
  • Heterogeneous gas-sensitive nano material based on cerium oxide particle modified copper oxide nanowire structure and preparation process and application thereof
  • Heterogeneous gas-sensitive nano material based on cerium oxide particle modified copper oxide nanowire structure and preparation process and application thereof

Examples

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Embodiment 1

[0059] (1) The copper foam that was ultrasonically cleaned with anhydrous ethanol and deionized water for 10 min and dried as the substrate and source material was put into a tube furnace for thermal oxidation, the ventilation atmosphere was high-purity oxygen, and the growth temperature was 500 °C , the growth time is 12 hours, and CuO nanowires are obtained, and its SEM image is as follows figure 2 As shown, it can be seen that the average diameter of CuO nanowires is about 90 nm, and the average length is about 10 μm;

[0060] (2) Prepare cerium ammonium nitrate solution with a concentration of 0.2 mol / L as a precursor solution and pour it into a hydrothermal kettle for hydrothermal reaction. The growth temperature is 200 °C and the growth time is 5 hours. After the reaction is completed, centrifuge with absolute ethanol Washed several times and dried to obtain CeO 2 nanoparticles;

[0061] (3) Ultrasonically separate and dry the CuO nanowires prepared in step (1) from t...

Embodiment 2

[0075] Similar to Example 1, the difference is that the hydrothermal method grows CeO 2 The growth temperature of the nanoparticles was 240°C, and the growth time was 5 hours. The obtained single CeO 2The SEM characterization of the particle-modified CuO nanowire gas sensor device is shown in Figure 10 shown. The single CeO synthesized under this process condition 2 The particle-modified CuO nanowire gas sensor device was also tested for hydrogen sulfide gas sensing performance, and the results are as follows: Figure 11 As shown, although its response is higher than that of the single CeO in Example 1 2 The particle-modified CuO nanowire gas sensor device is slightly lower, but compared with a single pure CuO nanowire device, the improvement is still obvious.

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Abstract

The invention discloses a heterogeneous gas-sensitive nano material based on a cerium oxide particle modified copper oxide nanowire structure and a preparation process and application thereof. A covalent bonding method is adopted, CeO2 nanoparticles prepared by a hydrothermal method are modified on CuO nanowires prepared by a thermal oxidation method, the CuO nanowires are further calcined to obtain the heterogeneous gas-sensitive material, and the synthesis method is relatively low in cost, high in preparation efficiency and capable of realizing large-scale production; the cerium oxide particle modified copper oxide nanowire-based novel single nanowire gas sensing device is prepared by adopting an electron beam lithography technology, the preparation method is good in repeatability and high in success rate, and the single nanowire gas sensing device can realize ultrafast and ultrasensitive detection on ppb-level trace hydrogen sulfide gas, meanwhile, the material has good selectivity and consistency and can be applied to the fields of industrial production, environment monitoring, food safety detection, medical health and the like.

Description

technical field [0001] The invention relates to the technical fields of semiconductor nanomaterial preparation, semiconductor device processing and gas sensing application, and specifically refers to a heterogeneous gas-sensing nanomaterial based on a copper oxide nanowire structure modified by cerium oxide particles, a preparation process and its application. Background technique [0002] In recent years, as the problem of atmospheric environmental pollution has become increasingly prominent, ultra-sensitive, high-precision gas sensors will play an increasingly important role in the fields of environmental monitoring, industrial safety, smoke alarms, and vehicle exhaust emission control. With the continuous development of science and technology, high-precision gas sensors also have great application development space in the fields of food safety detection and medical health. For example, in terms of food safety detection, gas sensors can detect the freshness of perishable f...

Claims

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Application Information

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IPC IPC(8): G01N27/12B82Y40/00B82Y30/00B82Y15/00
CPCG01N27/125G01N27/127B82Y30/00B82Y40/00B82Y15/00
Inventor 卢红亮朱立远袁凯平张卫
Owner FUDAN UNIV
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