Room temperature gas sensors have been widely explored in gas sensor technology for real-time applications. However, humidity has found to affect the room temperature sensing and the sensor life, necessitating the development of novel sensing materials with high sensitivity and stability under humid conditions at room temperature. In this work, the room temperature sensing performance of a Ti₃C₂T_x decorated, WO₃ nanorods based nanocomposite has been investigated. The hydrothermally synthesized WO₃/Ti₃C₂T_x nanocomposite has been investigated for structural, morphological, and electrical studies using X-ray diffraction, field-emission scanning electron microscopy, transmission electron microscopy, and Brunanuer–Emmett–Teller techniques. The WO₃/Ti₃C₂T_x sensors have been found to be highly selective to NO₂ at room temperature and exhibit much higher sensitivity in comparison to pristine WO₃ nanorods. Furthermore, sodium l-ascorbate treated Ti₃C₂T_x sheets in WO₃/Ti₃C₂T_x enhanced the stability and reversibility of the sensor toward NO₂ even under variable humidity conditions (0–99% relative humidity). This study shows the potential room temperature sensing application of a WO₃/Ti₃C₂T_x nanocomposite-based sensor for detecting NO₂ at sub-ppb level. Further, a plausible sensing mechanism based on WO₃/Ti₃C₂T_x nanocomposite has been proposed to explain the improved sensing characteristics.

中文翻译：

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使用二维 Ti3C2Tx 纳米片和一维 WO3 纳米棒纳米复合材料开发高灵敏度和湿度独立室温 NO2 气体传感器

室温气体传感器已在气体传感器技术中被广泛探索以用于实时应用。然而，已发现湿度会影响室温传感和传感器寿命，因此需要开发在室温潮湿条件下具有高灵敏度和稳定性的新型传感材料。_{在这项工作中，研究了Ti 3} C ₂ T _x装饰的WO ₃纳米棒基纳米复合材料的室温传感性能。水热合成的WO ₃ /Ti ₃ C ₂ T _x已经使用 X 射线衍射、场发射扫描电子显微镜、透射电子显微镜和 Brunanuer-Emmett-Teller 技术研究了纳米复合材料的结构、形态和电学研究。已发现WO ₃ /Ti ₃ C ₂ T _x传感器在室温下对 NO ₂具有高度选择性，并且与原始 WO ₃纳米棒相比表现出更高的灵敏度。此外，在WO ₃ /Ti ₃ C ₂ T _x中，L-抗坏血酸钠处理的 Ti ₃ C ₂ T _x片材即使在可变湿度条件下（0-99% 相对湿度），也增强了传感器对 NO _{2的稳定性和可逆性。本研究显示了基于 WO 3} /Ti ₃ C ₂ T _x纳米复合材料的传感器在检测亚 ppb 级NO ₂方面的潜在室温传感应用。此外，已经提出了一种基于WO ₃ /Ti ₃ C ₂ T _{x纳米复合材料的合理传感机制来解释改进的传感特性。}