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Cu-doped ZnFe2O4 nano particles as well as preparation method and application thereof

A nanoparticle, znfe2o4 technology, applied in nanotechnology, chemical instruments and methods, instruments, etc., can solve the problems of poor selectivity and high working temperature, and achieve the effects of good crystallization, good dispersion and uniform morphology

Active Publication Date: 2019-01-01
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The purpose is to prepare Cu-doped ZnFe with the advantages of uniform appearance, good dispersion, good crystallization, large specific surface area and stable properties by hydrothermal synthesis. 2 o 4 nanoparticles, and utilize these Cu-doped ZnFe 2 o 4 Nanoparticles are made into gas sensors with the advantages of low working temperature, high sensitivity, good reversibility, and good selectivity to overcome the problems of poor selectivity and high working temperature in existing gas sensors

Method used

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  • Cu-doped ZnFe2O4 nano particles as well as preparation method and application thereof
  • Cu-doped ZnFe2O4 nano particles as well as preparation method and application thereof
  • Cu-doped ZnFe2O4 nano particles as well as preparation method and application thereof

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Effect test

Embodiment 1

[0034] The gas sensitive coating of this embodiment is Cu-doped ZnFe 2 o 4 Schematic diagram of the main structure of the nanoparticle low-temperature gas sensor, such as figure 1 As shown, it includes a gas-sensitive coating 1; a platinum wire 2; a heating wire 3; a gold electrode 4; a ceramic tube 5; On the heating electrode, the gold electrode 4 is covered on the two ends of the outer surface of the ceramic tube 5 and welded on the four measuring electrodes of the base through the platinum wire 2, and the gas-sensitive coating 1 is coated on the outer surface of the ceramic tube 5 and the gold electrode 4 completely covered; the composition of the gas-sensitive coating 1 is Cu-doped ZnFe 2 o 4 Nanoparticles, Cu-doped ZnFe 2 o 4 The nanoparticles have a single hexagonal spinel crystal structure, the spheres are uniform in size and have good individual dispersion, and the diameter is between 30 and 50 nm.

[0035] The gas sensitive coating of this embodiment is Cu-doped...

Embodiment 2

[0045] The gas sensitive coating of this embodiment is Cu-doped ZnFe 2 o 4 Low-temperature gas sensors based on nanoparticles, such as figure 1As shown, it includes a gas-sensitive coating 1; a platinum wire 2; a heating wire 3; a gold electrode 4; On the heating electrode, the gold electrode 4 covers the two ends of the outer surface of the ceramic tube 5 and is welded on the measuring electrode of the base through the platinum wire 2, and the gas-sensitive coating 1 is coated on the outer surface of the ceramic tube 5 and the gold electrode 4 Complete coverage; the composition of the gas-sensitive coating 1 is Cu-doped ZnFe 2 o 4 Nanoparticles, Cu-doped ZnFe 2 o 4 The nanoparticles have a single hexagonal spinel crystal structure, the spheres are uniform in size and have good individual dispersion, the diameter is between 30-50nm, and they have a large specific surface area.

[0046] The present embodiment based on Cu-doped ZnFe 2 o 4 The preparation method of the lo...

Embodiment 3

[0054] The gas sensitive coating of this embodiment is Cu-doped ZnFe 2 o 4 Low-temperature gas sensors based on nanoparticles, such as figure 1 As shown, the gas-sensitive coating 1; the platinum wire 2; the heating wire 3; the gold electrode 4; the ceramic tube 5; On the electrodes, the gold electrodes 4 are covered on both ends of the outer surface of the ceramic tube 5 and welded on the measuring electrodes of the base through the platinum wire 2, and the gas-sensitive coating 1 is coated on the outer surface of the ceramic tube 5 and completely covered by the gold electrodes 4 ; The composition of the gas-sensitive coating 1 is Cu-doped ZnFe 2 o 4 Nanoparticles, Cu-doped ZnFe 2 o 4 Nanoparticles have a single hexagonal spinel crystal structure, uniform sphere size and good individual dispersion, with a diameter between 30-50nm and a large specific surface area.

[0055] The present embodiment based on Cu-doped ZnFe 2 o 4 The preparation method of the low-temperatur...

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Abstract

The invention belongs to the technical field of gas sensors made from a zero-dimensional metal oxide semiconductor material, and particularly relates to Cu-doped ZnFe2O4 nano particles as well as a preparation method and application thereof. The method comprises the following steps of dissolving FeCl3, ZnCl2, CuCl2 and CON2H4 in deionized water in a molar ratio of 10 to 10 to (8 to 15) to 330, wherein the molar ratio of FeCl3 to the deionized water is 1 to 50mol / L, and performing magnetic stirring to obtain a mixed solution; carrying out washing, drying and heat treatment to obtain the Cu-doped ZnFe2O4 nano particle. The Cu-doped ZnFe2O4 nano particles are prepared into the gas-sensitive coating of a low-temperature gas sensor, a relatively great sensitivity to H2S gas can be obtained whenthe gas sensor is at 25-50 DEG C, the problem that a traditional metal oxide semiconductor type gas sensor has relatively poor gas-sensitive properties at a low-temperature area is solved, and the gas sensor has a good development prospect.

Description

technical field [0001] The invention belongs to the technical field of gas sensors of zero-dimensional metal oxide semiconductor materials, and in particular relates to a Cu-doped ZnFe 2 o 4 Nanoparticles and methods of preparation and applications thereof. Background technique [0002] With the rapid development of the domestic economy, the process of urbanization and industrialization continues to accelerate, especially in the fields of ore mining, coal, chemical industry, manufacturing and processing, petroleum, automobiles, etc. During the production process and use of products, various pollutants are continuously emitted. Toxic and harmful or flammable and explosive gases. If these gases leak into the air, they will seriously pollute the environment and become a potential source of danger for explosions, fires or poisoning. In order to effectively prevent the leakage of harmful gases, effectively protect the environment, people's property and personal safety, it is ne...

Claims

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Application Information

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IPC IPC(8): G01N27/12C01G49/00B82Y40/00
CPCC01G49/00C01P2002/72C01P2004/03C01P2004/04C01P2004/64G01N27/127
Inventor 沈岩柏张威赵思凯李停停卢瑞李昂韩聪魏德洲
Owner NORTHEASTERN UNIV
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