@Article{cl.2026.087654,
AUTHOR = {Huo Ye, Jiantong Li, Lingna Xu},
TITLE = {Emerging MoS<sub>2</sub>-Based Composite Approaches for the Detection of SF<sub>6</sub> Decomposition Gases: A Review},
JOURNAL = {Chalcogenide Letters},
VOLUME = {23},
YEAR = {2026},
NUMBER = {8},
PAGES = {--},
URL = {http://www.techscience.com/CL/v23n8/68850},
ISSN = {1584-8663},
ABSTRACT = {SF<sub>6</sub> is the primary insulating and arc extinction medium in gas-insulated switchgear (GIS). Sulfur hexafluoride (SF<sub>6</sub>) decomposes to create diagnostic markers, such as sulfur dioxide (SO<sub>2</sub>), thionyl fluoride (SOF<sub>2</sub>), and hydrogen sulfide (H<sub>2</sub>S) when electrical problems occur, such as partial discharge and local overheating. Accurate quantification of these fault-marker gases is important for the early identification of insulation defects and the condition assessment of SF<sub>6</sub>-insulated equipment. Molybdenum disulfide (MoS<sub>2</sub>) is a well-known and atomically thin van der Waals semiconductor that has attracted considerable attention as a platform for gas-sensing applications. This is due to its large accessible surface area, ability to tune its bandgap using a gate, and its good charge transfer properties. Gas adsorption induces charge transfer and redistributes charge carriers in MoS<sub>2</sub>, thereby reorganizing surface energy levels and changing its electrical properties. This review summarizes recent advances in MoS<sub>2</sub>-based sensing materials for the detection of SF<sub>6</sub> decomposition gases. This review examined three key ways to improve performance: modifying the atomic lattice, surface modification, and constructing heterojunction composites. Each of these strategies contributes to improving detection capabilities in a different way. Beyond decomposition-gas detection, ppm-scale moisture sensing and SF<sub>6</sub> leakage monitoring are also briefly compared as complementary functions required for automated GIS condition monitoring. The review evaluates the effectiveness of these sensing materials for detecting SO<sub>2</sub> and thionyl fluoride SOF<sub>2</sub> and outlines future research directions.},
DOI = {10.32604/cl.2026.087654}
}