Acetone gas sensor and preparation method thereof

A gas sensor, acetone technology, applied in the direction of material resistance, etc., to achieve the effect of simple preparation process, simple and practical process

Active Publication Date: 2015-10-07
JIANGXI NORMAL UNIVERSITY
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for manufacturing an acetone gas sensor, which solves the problem of the existing TiO b

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  • Acetone gas sensor and preparation method thereof
  • Acetone gas sensor and preparation method thereof
  • Acetone gas sensor and preparation method thereof

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[0015] The beneficial effects of the present invention will be described in detail below in conjunction with the embodiments of the accompanying drawings, aiming at helping readers better understand the essence of the present invention, but not limiting the implementation and protection scope of the present invention.

[0016] Three-dimensional hierarchical TiO with exposed high-energy {001} crystal planes was first prepared by a hydrothermal method 2 Hollow sphere material, then alumina ceramic tube coated with fork-shaped gold electrodes on the outer surface as the carrier, Ni-Cr alloy heating wire as the heating element, platinum wire to lead the electrode, and the conventional process of side-heated gas sensor device for gas sensing The material is coated, welded and aged to make a semiconductor gas sensor device, and finally the gas sensor performance test is carried out on the obtained device.

[0017] The hydrothermal method to prepare TiO with high-energy {001} facet e...

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Abstract

The invention discloses an acetone gas sensor and a preparation method thereof. The preparation method comprises the following steps: firstly, controlling hydrolysis, nucleation and crystallization processes of titanium source titanium sulfate by utilizing ammonium fluoride, and carrying out one-step quick hydrothermal reaction to obtain a three-dimensional hierarchical TiO2 hollow sphere material with anatase-phase high-energy {001} crystal face exposure; and then, adopting a heater-type gas sensor to carry out gas-sensitive material coating, welding and ageing to prepare a semiconductor type gas-sensitive device by a normal process. According to the gas-sensitive property test results, the device can detect acetone within different working temperature ranges, so that structure-enhanced gas-sensitive properties are shown. According to the invention, the construction for the gas sensor based on the three-dimensional hierarchical TiO2 hollow sphere material with anatase-phase high-energy {001} crystal face exposure is firstly realized, so that the research thought of the semiconductor type gas sensor is expanded.

Description

technical field [0001] The invention relates to a gas sensor, in particular to an acetone gas sensor and a preparation method thereof. Background technique [0002] The monitoring and control of toxic, harmful, flammable and explosive gases in the environment has become an environmental problem that people must solve, and gas sensors are a kind of equipment to solve this problem. In the research of resistive semiconductor gas sensor, TiO 2 Due to the comparison with other semiconductor materials such as SnO 2 , ZnO, WO 3 、In 2 o 3 , Fe 2 o 3 etc.) has the advantages of low cost, stable properties and biocompatibility, so it has become a widely researched gas-sensing material, especially in oxygen sensors for automobiles, TiO 2 The series of gas-sensing materials are the most researched and matured among metal oxide materials, and have been put into practical use. Nanomaterials have many unique advantages as gas-sensing materials. When the size of the material is redu...

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Application Information

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IPC IPC(8): G01N27/04
Inventor 杨勇
Owner JIANGXI NORMAL UNIVERSITY
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