Abstract Gas sensing materials-based transition metal oxides have insufficient sensing properties that limit their application. Inorganic-organic hybrid nanomaterials are the most advanced materials for high sensitivity gas sensors. Herein, hexafluoroisopropanol (HFIP) was grafted on the tungsten trioxide (WO3) hollow nanofibers (HNFs) for detecting dimethyl methylphosphonate (DMMP, sarin agent simulant) due to the hydrogen bonding. Furthermore, reduced Graphene Oxide (rGO) nanosheets were applied as a base layer to avoid the grain boundaries poisoning and enhance the charge mobility. As well, the UV-light photoactivation of the sensing materials was investigated. The double layer rGO/WO3–HFIP exhibited high and rapid responses toward DMMP in comparison with WO3 HNFs and double layer rGO/WO3 after the exposure to various gases. The sensing performance of all sensors improved under UV-light irradiation, demonstrating the UV-light activation of their sensing properties. The double layer rGO/WO3–HFIP showed a high response (17.6) at 150 °C of 10 ppm DMMP with maintaining 90% of it at a relative humidity (80 RH %). In addition to a low detection limit of 0.1 ppm DMMP, indicating the role of HFIP as a hinter of DMMP molecules. This work provides an efficient synthetic method of double layer rGO/WO3–HFIP sensing material for DMMP detection.

中文翻译：

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HFIP 功能化电纺 WO3 中空纳米纤维/rGO 作为紫外光照射下甲基膦酸二甲酯气体的高效双层传感材料

摘要 基于气敏材料的过渡金属氧化物传感性能不足，限制了其应用。无机-有机杂化纳米材料是用于高灵敏度气体传感器的最先进材料。在此，六氟异丙醇（HFIP）接枝在三氧化钨（WO3）中空纳米纤维（HNF）上，用于检测甲基膦酸二甲酯（DMMP，沙林毒剂模拟物）由于氢键。此外，还原氧化石墨烯（rGO）纳米片被用作基层，以避免晶界中毒并提高电荷迁移率。此外，还研究了传感材料的紫外光光活化。与暴露于各种气体后的 WO3 HNF 和双层 rGO/WO3 相比，双层 rGO/WO3-HFIP 对 DMMP 表现出高而快速的响应。在紫外光照射下，所有传感器的传感性能都得到了改善，证明了它们的传感特性的紫外光激活。双层 rGO/WO3-HFIP 在 150°C 下对 10 ppm DMMP 显示出高响应 (17.6)，并在相对湿度 (80 RH %) 下保持 90%。除了 0.1 ppm DMMP 的低检测限外，表明 HFIP 作为 DMMP 分子的提示作用。这项工作提供了一种用于DMMP检测的双层rGO/WO3-HFIP传感材料的有效合成方法。表明 HFIP 作为 DMMP 分子的提示的作用。这项工作提供了一种用于DMMP检测的双层rGO/WO3-HFIP传感材料的有效合成方法。表明 HFIP 作为 DMMP 分子的提示的作用。这项工作提供了一种用于DMMP检测的双层rGO/WO3-HFIP传感材料的有效合成方法。