A method for detecting formaldehyde gas using a SnO2 / SnS2 / rGO ultrathin nanosheet gas sensor

By synthesizing SnO2/SnS2/rGO ultrathin nanosheet materials via hydrothermal synthesis, the problems of high temperature, poor selectivity, and insufficient stability in existing gas sensors for formaldehyde detection have been solved, achieving high sensitivity and selectivity for formaldehyde gas detection, which is suitable for the field of smart home monitoring.

CN116399914BActive Publication Date: 2026-05-26SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-02-27
Publication Date
2026-05-26

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Abstract

A method for detecting formaldehyde gas using a SnO2 / SnS2 / rGO ultrathin nanosheet gas sensor is disclosed. This invention employs a simple and efficient hydrothermal method in the design and preparation of the gas-sensitive material. The synthesis formula includes the preparation of SnO2, the sulfidation of SnO2, and the introduction of rGO. The entire production process is simple and highly controllable, resulting in a material with high purity, good dispersibility, and excellent performance, suitable for large-scale industrial production. The SnO2 / SnS2 / rGO material prepared by this invention exhibits high sensitivity, good selectivity, and stability for formaldehyde at 100℃. Its greatest advantage lies in its ability to detect formaldehyde at 100℃, providing a simple and rapid technical means for on-site online monitoring of indoor air pollutants; thus, it shows broad application prospects in the detection of formaldehyde and other volatile organic compounds (VOCs) in the environment.
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