Hybrid SnO2 nano composite: Recent advances in the synthesis, characterization and gas sensor applications

Abstract

Currently, the gas sensor market is worth of USD 2.33 billion. It is forecasted that the growth of compound annual rate value willing to be 8.7% within the length from 2021 to 2028. The metal oxide semiconducting gas sensor has a restricted its use due to high temperature operation, higher power consumption, short-term stability, sensitive to humidity. In order to detect and resolve methane leaks, reliable and cost-effective sensors need to be developed. In this context, many research works focused to develop tin oxide gas sensor at higher temperature and at higher gas concentration but only few or no amounts work shows gas sensor detection at lower operating temperature and lower gas concentration. The objective of this review paper is provide insights into various synthesis strategy of hybrid SnO2 nanocomposite adopted by various research groups. Characterization of hybrid SnO2 nanoparticles for sensor applications carried out using X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Energy dispersion spectroscopy (EDS), Fourier Transform Infrared spectroscopy (FTIR) methods to study the structural features by various research works are consolidated. Further, the development of sensor device using hybrid SnO2 nanoparticles and their sensing property towards gasses such as CO, NH3, NO2, Methane, Ethanol etc studied by various works are compiled. The research can be expanded to include transition metal ions such as copper, cobalt, zinc, and others, which could improve sensitivity, electrical, and optical properties, as well as the detection of other gases. The cost of sensor fabrication can be reduced by concentrating on reducing the sensor's reaction time recovery time. At the end all the sensing results were correlated and proposed the suitable conditions, hybrid SnO2 nanocomposite for better gas sensor applications.