a cds/co 3 o 4 Composite material, preparation method and its application in detection of acetone gas under light excitation

Abstract

This application discloses a CdS / Co 3 o 4 Composite material and its preparation method and application, the CdS / Co 3 o 4 Composite materials include Co 3 o 4 Nanofibers are well attached to the Co 3 o 4 CdS nanoparticles between nanofibers, where the Co 3 o 4 The diameter of the nanofiber is 200-300nm, the diameter of the CdS nano-particle is 300-400nm, and the CdS / Co 3 o 4 The composite material can be made into a gas sensor, an acetone gas sensor, and a light-excited gas-sensing test platform. The CdS / Co 3 o 4 Composite materials and their products can detect acetone gas at room temperature (25°C), and have the advantages of high sensitivity, short response recovery time, good selectivity, etc., and a wide detection range, effectively solving the problem of traditional acetone gas sensors at low temperature and low temperature. The problem of poor gas sensitivity characteristics in the gas concentration area.

Description

A CdS / Co 3 O 4 Composite material, preparation method and effect on acetone gas under light excitation Applications in Body Detection technical field The application belongs to semiconductor oxide application field, particularly a kind of CdS / Co 3 O 4 Composite material, preparation method and its application in the detection of acetone gas under light excitation. Background technique Acetone is a kind of colorless, flammable, volatile compound, is widely used in explosives, paint and plastic field, has It has a pungent odor, and long-term exposure to acetone vapor will seriously endanger human health, causing eye irritation, dizziness, fatigue, Symptoms such as bronchitis and, in severe cases, damage to organs. On the other hand, with the continuous development of medical technology, in recent years, exhalation The detection of the biomarker acetone in gas has become a new method for non-invasive diagnosis of diabetes in medicine. Currently in th...

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Problems solved by technology

[0003] The methods for detecting acetone content in gas in the prior art include spectral detection method, chromatographic detection method, electrochemical sensor method, etc. However, spectral detection method and chromatographic detection method all need to use special reagents to carry out gas sampling in the environment to be tested, and then Use specific equipment for detection according to specific methods, for example, gas chromatography requires the use of gas chromatographs, and the specific equipment itself is expensive, maintenance and use of these equipment also have very high costs, and the detection sensitivity is low; electrochemical sensors Use ultraviolet light and electric field ionization to decompose acetone in the ambient gas and convert it into carbon monoxide, and then use electrochemical principles to detect the content of carbon monoxide to determine the content of acetone. The electrochemical sensor can only be measured at a single point, with low response and failure. high rate

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