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首页> 外文期刊>RSC Advances >Reduced graphene oxide–polyethylene oxide hybrid films for toluene sensing at room temperature
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Reduced graphene oxide–polyethylene oxide hybrid films for toluene sensing at room temperature

机译：在室温下还原石墨烯氧化物 - 聚环氧乙烷杂种膜，用于甲苯感测

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摘要

A reduced graphene oxide (RGO)–polyethylene oxide (PEO) hybrid film was constructed with composite and bilayer film structures for effective ambient toluene detection. The morphology and chemical properties of the fabricated RGO–PEO hybrid materials were characterized by SEM, and Raman and FTIR spectroscopies, respectively. Sensitive properties of real-time response, sensitivity, repeatability and selectivity to toluene vapor were studied as well at room temperature. The experimental data show that the gas sensors based on composite film have a higher sensitivity than the ones based on bilayer film and pure RGO film at toluene concentrations from 80 ppm to 140 ppm. In addition, the effect of PEO volume fraction and humidity on the sensing performance was also studied. The sensor with a PEO volume fraction of 50% has a better sensitivity and faster response/recovery than others. With respect to selectivity, the gas response of the prepared sensors to toluene was at least 2-fold higher than those to other vapor species, including acetone, ethanol, hydrogen, water and formaldehyde. Furthermore, the sensing mechanism of the fabricated sensors was investigated by comparing the device performance in the presence of dry air or nitrogen as carrier gas.
机译：用复合物和双层膜结构构建了一种石墨烯氧化物（RGO）氧化乙烷（PEO）杂化膜，用于有效的环境甲苯检测。通过SEM和拉曼和FTIR光谱分别表征了制造的RGO-PEO混合材料的形态和化学性质。在室温下，研究了实时响应，敏感性，可重复性和选择性对甲苯蒸气的敏感性。实验数据表明，基于复合薄膜的气体传感器具有比基于双层膜和甲苯浓度为80ppm至140ppm的甲苯浓度的敏感性更高的敏感性。此外，还研究了PEO体积分数和湿度对传感性能的影响。具有50％的PEO体积分数的传感器具有比其他更好的敏感性和更快的响应/恢复。关于选择性，制备的传感器对甲苯的气体反应比其他蒸汽物种高至少2倍，包括丙酮，乙醇，氢气，水和甲醛。此外，通过将器件性能与在干燥空气或氮的存在中作为载气的存在来研究制造传感器的感测机理。

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