In Situ TiO2-rGO Nanocomposite for Low Concentration NO Gas Sensor

Abstract

A novel room temperature-based Nitric Oxide (NO) gas sensor of TiO2-rGO composite nanofibers was prepared using electrospinning and solvothermal synthesis. The composite’s physicochemical properties were investigated using various analytical methods such as SEM, TEM, EDS, XRD, Raman spectroscopy, and XPS. When the composite was exposed to the NO gas sensor, it exhibits an excellent gas sensing property at room temperature (30 °C). This composite sensor sensitivity is 7.1 when exposed to 2.75 ppm of NO gas, with a 440 s response time. The possible gas sensing mechanism of TiO2-rGO was also proposed. This study demonstrates that TiO2-rGO composite nanofibers have capability application possibilities in gas sensing, thereby imparting another perspective to create and develop sensors.