Acetone gas sensor based on bimetallic supported nanoparticles and method of preparation thereof

By incorporating indium trichloride tetrahydrate and adding gold chloride and platinum tetrachloride into tin hydroxide precipitate, a bimetallic nanoparticle-loaded acetone gas sensor was formed, which solved the problems of high sensor excitation temperature and poor selectivity, and achieved low-temperature, high-efficiency, and highly selective acetone gas detection.

CN120948564BActive Publication Date: 2026-06-16SHENZHEN SHIDAI SENSING TECH CO LTD
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Patent Information

Application Number
CN202511219037.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-08-28
Publication Date
2026-06-16
Estimated Expiration
2045-08-28

AI Technical Summary

Technical Problem

Existing gas sensors for acetone detection suffer from problems such as excessively high excitation temperatures and poor selectivity, especially in complex exhaled gases where they are easily interfered with by other volatile organic compounds.

Method used

An acetone gas sensor based on bimetallic loaded nanoparticles was prepared by incorporating indium trichloride tetrahydrate into tin hydroxide precipitate to form a mixed crystal or heterojunction structure, and then adding gold chloride and platinum tetrachloride. After sintering, gold and platinum nanoparticles were formed, which reduced the reaction activation energy and improved selectivity.

Benefits of technology

It achieves effective activation of gas-sensitive reactions at lower temperatures (200~400℃), reduces energy consumption, simplifies system heat dissipation design, improves selectivity and detection accuracy for acetone, and reduces cross-interference.

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Abstract

The application provides a bimetallic nanoparticle-based acetone gas sensor and a preparation method thereof. The preparation method comprises the following steps: adding tin chloride into a solution containing a complexing agent and deionized water, stirring for 10 minutes at 60 DEG C, then adding ammonia water until the pH reaches 3, and obtaining a tin hydroxide precipitate powder after centrifugal washing; adding the tin hydroxide precipitate powder into indium trichloride tetrahydrate powder, gold chloride powder and platinum tetrachloride powder in sequence, and performing ball milling mixing, sintering at 600 DEG C for 2 hours, and obtaining bimetallic nanoparticle; adding ethylene glycol and zirconium oxide ball milling beads into the bimetallic nanoparticle, performing ball milling for 8 hours, obtaining a point glue solution, coating the point glue solution on a micro motor heating plate, drying at room temperature, and sintering at 200-400 DEG C for 3-4 hours, and obtaining the bimetallic nanoparticle-based acetone gas sensor. Therefore, the excitation temperature can be effectively reduced, and the selectivity to acetone gas can be improved.
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