Emerging Role of NbCT MXene in Sensors: The Roadmap from Synthesis to Health and Environmental Monitoring.

The rise of two-dimensional (2D) materials has transformed gas sensing, with NbCT MXene drawing significant interest due to its distinct physicochemical behaviors. As part of the MXene family, NbCT MXene demonstrates a remarkable combination of high electrical conductivity, adjustable surface chemistry, and exceptional mechanical flexibility, positioning it as a promising candidate for next-generation gas sensors. This review explores the synthesis techniques for NbCT MXene, highlighting etching methods and post-synthesis adjustments to achieve the tailored surface terminations and structural qualities essential for gas detection. A comprehensive examination of the crystal structure, morphology, and electronic characteristics of NbCT MXene is presented to clarify its outstanding sensing capabilities. The application of NbCT MXene for detecting gases, including NH, humidity, NO, and volatile organic compounds (VOCs), is assessed, showcasing its sensitivity, selectivity, and low detection limits across various environmental settings. Furthermore, the integration of NbCT MXene with other nanostructures in sensor platforms is reviewed. Lastly, challenges related to scalability, stability, and long-term performance are addressed, along with future prospects for NbCT MXene-based gas sensors. This review offers significant insights into the potential of NbCT MXene as a pioneering material for enhancing gas sensing technologies.