Present paper aims to study the comparative analysis of the sensing performance between three fabricated metal oxide based ternary hybrid device structures [Pd/RGO/TiO₂-nanotubes (NTs), Pd/RGO/MnO₂ nanoflowers (NFs) and Pd/RGO/WO₃-nanoflowers (NFs)]. In each of the ternary structure, the oxide nanostructure play the role of basic sensing matrix where due to extremely high surface to volume ratio of the corresponding nanostructure, the availability of adsorption sites increases, which leads to increased sensitivity or response magnitude (%RM) of the sensor. On the contrary, RGO acts on a high mobility (~ 1600 cm²/V-s) distributed connector among the neighbouring nanostructure leading towards improved response or recovery kinetics. Finally, Pd nanoparticles due to their catalytic activity (which reduces activation energy requirement for target species dissociation), bring forth as the substantial reduction in operating temperature. By employing those ternary hybrid structure sensing layers, room temperature (27 °C) alcohol sensing with a very high detection range (1–700 ppm) was achieved with appreciably fast response time (~ 12–20 s) and recovery time (~ 23–30 s) without compromising the response magnitude (80–98% at 700 ppm). Finally, a comparative analysis of the sensing performances for the above-mentioned three ternary hybrid gas sensors was illustrated.

中文翻译：

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三种不同三元杂化气体（Pd / RGO / TiO 2 -NTs，Pd / RGO / MnO 2 -NFs和Pd / RGO / WO 3 -NFs）气体传感器器件结构的传感性能综述

本文旨在研究三种基于金属氧化物的三元混合器件结构[Pd / RGO / TiO _2-纳米管（NTs），Pd / RGO / MnO ₂纳米花（NFs）和Pd / RGO / WO ₃ -nanoflowers（NFs）]。在每个三元结构中，氧化物纳米结构均起基本传感矩阵的作用，由于相应纳米结构的极高的表面体积比，吸附位的可用性增加，从而导致灵敏度或响应幅度（％RM）增加传感器的 相反，RGO具有高移动性（〜1600 cm ²/ Vs）分布在相邻纳米结构之间的连接器，从而改善了响应或恢复动力学。最后，Pd纳米颗粒由于其催化活性（降低了目标物种解离的活化能要求）而导致工作温度的大幅降低。通过使用这些三元混合结构感测层，可以在非常快的响应时间（〜12–20 s）和恢复时间（〜23）下实现具有很高检测范围（1-700 ppm）的室温（27°C）酒精感测。 –30 s）而不会影响响应幅度（700 ppm时为80–98％）。最后，对上述三个三元混合气体传感器的传感性能进行了比较分析。