Department of Chemical Engineering, UAE University, Al Ain, United Arab Emirates.
Department of Chemistry, UAE University, Al Ain, United Arab Emirates; Department of Ceramics, National Research Centre, NRC, Cairo, Egypt.
Carbohydr Polym. 2021 Apr 15;258:117643. doi: 10.1016/j.carbpol.2021.117643. Epub 2021 Jan 21.
Electrospun nanofibers and solution-casting nanofilms were produced from an environmentally friendly cellulose acetate (CA) blended with glycerol (as an ionic liquid (IL)), mixed with polypyrrole (PPy, a conducting polymer) and doped with tungsten oxide (WO) nanoparticles. The sensing membranes fabricated were used to detect HS gas at room temperature and shown to exhibit high performance. The results revealed that the lowest operating temperature of both nanofiber and nanofilm sensors was 20 °C, with a minimum gas detection limit of 1 ppm. Moreover, the sensor exhibits a reasonably fast response, with a minimum average response time of 22.8 and 31.7 s for the proposed nanofiber and nanofilm based sensors, respectively. Furthermore, the results obtained indicated an excellent reproducibility, long-term stability, and low humidity dependence. Such distinctive properties coupled with an easy fabrication technique provide a promising potential to achieve a precise monitoring of harmful HS gas in both indoor and outdoor atmospheres.
静电纺纳米纤维和溶液浇铸纳米薄膜是由环境友好型醋酸纤维素（CA）与甘油（作为离子液体（IL））共混，与聚吡咯（PPy，一种导电聚合物）混合，并掺杂氧化钨（WO）纳米粒子制成的。所制备的传感膜用于在室温下检测 HS 气体，并表现出优异的性能。结果表明，两种纳米纤维和纳米薄膜传感器的最低工作温度均为 20°C，气体检测的最低极限为 1ppm。此外，传感器的响应速度较快，基于所提出的纳米纤维和纳米薄膜传感器的平均响应时间最小分别为 22.8 和 31.7s。此外，研究结果表明，该传感器具有良好的重现性、长期稳定性和低湿度依赖性。这些独特的性能，再加上易于制造的技术，为实现对室内和室外环境中有害的 HS 气体的精确监测提供了有前途的潜力。
