A methyl mercaptan sensitive material, sensor and preparation method and use thereof

By using CdS/SBO heterojunction sensing material, the existing methylmercaptan sensors have solved the problems of high working temperature, flammable and explosive and interference from hydrogen sulfide, and achieved a high response and excellent selectivity sensing effect to methylmercaptan at lower temperatures.

CN114813859BActive Publication Date: 2025-03-25HEFEI INSTITUTE OF PHYSICAL SCIENCE CHINESE ACADEMY OF SCIENCES
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Patent Information

Application Number
CN202210591553.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-05-27
Publication Date
2025-03-25
Estimated Expiration
2042-05-27

AI Technical Summary

Technical Problem

The existing methylmercaptan sensors have high working temperature, are flammable and explosive, and are severely disturbed by hydrogen sulfide, and have poor long-term stability.

Method used

SBO nanoparticles were prepared by solvothermal method using CdS/SBO heterojunction sensing material, and CdS/SBO composite nanomaterials were prepared by chemical precipitation to form heterojunction sensing material with a porous structure. The sensor has a high response to methylmercaptan at a lower operating temperature of 100°C, and has weak response to a variety of volatile organic compounds and has high selectivity.

Benefits of technology

It achieves high response to methylmercaptan at lower operating temperatures, and has excellent selectivity and long-term stability, avoids interference from hydrogen sulfide, and is suitable for a variety of humidity environments.

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Abstract

The present invention relates to the technical field of electronic devices, and in particular to a methyl mercaptan sensitive material, a sensor, and a preparation method and use thereof. The sensing material is composed of CdS nanoparticles and (Sr 0.6 Bi 0.305 )2Bi2O7 is abbreviated as SBO nanoparticles, and the SBO nanoparticles are uniformly dispersed in CdS nanoparticles. The sensor includes an insulating substrate, a forked test electrode arranged on the upper surface of the insulating substrate, a heating electrode arranged on the lower surface of the insulating substrate, and a methyl mercaptan sensing material sensitive layer coated on the forked test electrode substrate. When the sensor is used to test methyl mercaptan, the operating temperature is low, the methyl mercaptan gas response is high, the selectivity is high, and the long-term stability is good, and it can meet the requirements of accurate and rapid identification and detection of excessive methyl mercaptan in indoor and outdoor environments.
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