Yan Yan, Yang Guiqin, Xu Jian-Long, Zhang Meng, Kuo Chi-Ching, Wang Sui-Dong
College of Electronic and Information Engineering, Shenzhen University, Shenzhen, P. R.China.
School of Physics and Electronic Engineering, Yuxi Normal University, Yuxi, Yunnan, P. R. China.
Sci Technol Adv Mater. 2021 Jan 6;21(1):768-786. doi: 10.1080/14686996.2020.1820845.
With the rapid development of conductive polymers, they have shown great potential in room-temperature chemical gas detection, as their electrical conductivity can be changed upon exposure to oxidative or reductive gas molecules at room temperature. However, due to their relatively low conductivity and high affinity toward volatile organic compounds and water molecules, they always exhibit low sensitivity, poor stability, and gas selectivity, which hinder their practical gas sensor applications. In addition, inorganic sensitive materials show totally different advantages in gas sensors, such as high sensitivity, fast response to low concentration analytes, high surface area, and versatile surface chemistry, which could complement the conducting polymers in terms of the sensing characteristics. It seems to be a win-win choice to combine inorganic sensitive materials with polymers for gas detection due to their synergistic effects, which has attracted extensive interests in gas-sensing applications. In this review, we summarize the recent development in polymer-inorganic nanocomposite based gas sensors. The roles of inorganic nanomaterials in improving the gas-sensing performances of conducting polymers are introduced and the progress of conducting polymer-inorganic nanocomposites including metal oxides, metal, carbon (carbon nanotube, graphene), and ternary composites are presented. Finally, a conclusion and a perspective in the field of gas sensors incorporating conducting polymer-inorganic nanocomposite are summarized.
随着导电聚合物的快速发展，它们在室温化学气体检测中显示出巨大潜力，因为在室温下暴露于氧化性或还原性气体分子时，其电导率会发生变化。然而，由于它们相对较低的电导率以及对挥发性有机化合物和水分子的高亲和力，它们总是表现出低灵敏度、差稳定性和气体选择性，这阻碍了它们在实际气体传感器中的应用。此外，无机敏感材料在气体传感器中表现出完全不同的优势，如高灵敏度、对低浓度分析物的快速响应、高表面积和多样的表面化学性质，这在传感特性方面可以补充导电聚合物。由于无机敏感材料与聚合物的协同效应，将它们结合用于气体检测似乎是一个双赢的选择，这在气体传感应用中引起了广泛关注。在这篇综述中，我们总结了基于聚合物-无机纳米复合材料的气体传感器的最新进展。介绍了无机纳米材料在改善导电聚合物气体传感性能方面的作用，并展示了导电聚合物-无机纳米复合材料（包括金属氧化物、金属、碳（碳纳米管、石墨烯）和三元复合材料）的进展。最后，总结了在包含导电聚合物-无机纳米复合材料的气体传感器领域的结论和展望。
