Acetone gas sensor based on NiO / ZnO heterostructure hollow ball sensitive material and preparation method thereof

A gas sensor and sensitive material technology, applied in the direction of analyzing materials, material resistance, and material analysis through electromagnetic means, can solve the problems of low sensitivity, high detection temperature, etc., and achieve high sensitivity, good repeatability, and simple manufacturing process Effect

Active Publication Date: 2016-11-16
JILIN UNIV
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Problems solved by technology

However, although many ZnO materials with different morphologies, large specific surface areas, and active site

Method used

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  • Acetone gas sensor based on NiO / ZnO heterostructure hollow ball sensitive material and preparation method thereof
  • Acetone gas sensor based on NiO / ZnO heterostructure hollow ball sensitive material and preparation method thereof
  • Acetone gas sensor based on NiO / ZnO heterostructure hollow ball sensitive material and preparation method thereof

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Embodiment 1

[0041] Using NiO / ZnO heterostructure hollow spheres as sensitive materials to make acetone sensors, the specific manufacturing process:

[0042] 1. First, 1.10g of Zn(CH 3 COO) 2 2H 2 O and 0.06g Na 3 C 6 h 5 o 7 2H 2 Dissolve O in 200mL of deionized water, and keep stirring until it is completely dissolved; then slowly add 5mL of ammonia water to it until the solution is clear;

[0043] 2. React the above solution for 40 minutes under the condition of microwave power 300W and 90°C, take it out, cool it down to room temperature naturally, wash the formed precipitate with deionized water and ethanol for several times, and then dry it at room temperature before cooling it at 500°C Calcined at lower temperature for 2 hours, thus obtained ZnO hollow sphere powder assembled by ZnO nanoparticles;

[0044] 3. Take 50mg of the above ZnO hollow sphere powder and add it to a mixed solvent composed of 3mL ethylene glycol and 7mL ethanol, ultrasonically and stir for 20 minutes to ...

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Abstract

The invention relates to an acetone gas sensor based on a NiO / ZnO heterostructure hollow ball sensitive material and a preparation method thereof, and belongs to the technical field of semiconductor oxide gas sensors. The invention uses a NiO-ZnO heterostructure hollow ball sensitive material prepared by microwave assisted method and solvothermal method. The catalytic effect of NiO nanoparticles on organic gas and the heterogeneous structure between the two can effectively improve the sensitivity of the sensor to acetone. In addition, the sensor structure adopted by the invention comprises a commercially available Al2O3 insulating ceramic tube with 2 annular gold electrodes, a semiconductor sensitive material coated on annular gold electrodes and the Al2O3 insulating ceramic tube, and a nickel chromium alloy heating coil passing through the Al2O3 insulating ceramic tube. The device has the advantages of simple process and small size, and is suitable for mass production, so it has broad application prospects in the detection of acetone content in microenvironment.

Description

technical field [0001] The invention belongs to the technical field of semiconductor oxide gas sensors, in particular to an acetone gas sensor based on a NiO / ZnO heterostructure hollow sphere sensitive material and a preparation method thereof. Background technique [0002] Acetone, also known as dimethyl ketone, is a colorless, transparent, lively, flammable, volatile liquid with a pungent smell. In industry, it can not only be used as an important solvent for the production of explosives, plastics, and rubber, but also an important raw material for the synthesis of ketene, iodoform, and epoxy resin. However, similar to other organic solvents, it is flammable and volatile, and it is easy to burn and explode when exposed to open flames and high heat, and its explosion limit is 2.55% to 12.8%. Moreover, acetone not only has a greater fire hazard, but also has an anesthetic effect on the central nervous system of the human body at low concentrations, causing damage to the ner...

Claims

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Application Information

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IPC IPC(8): G01N27/12
CPCG01N27/127
Inventor 卢革宇刘畅孙鹏高原梁喜双马健刘方猛
Owner JILIN UNIV
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