Performance Enhancement of Linalool Sensor With Pt Decorated Composite of ZnO Nanorod and SnO

Abstract

An extensive analysis of six different hydrothermally prepared sensors is presented in this article. The influence of operating temperature, gas concentration, and incorporation of platinum (Pt) as an additive in a metal–oxide–semiconductor (MOS) composite is analyzed. Among the fabricated sensors, Pt decorated composite of ZnO nanorod and SnO2 sensor is found to exhibit the highest sensitivity and favorable response and recovery time on exposure to linalool. The structural and morphological analyses of the fabricated films are carried out using X-ray diffraction (XRD) and scanning electron microscopy (SEM). The Pt decorated composite of ZnO nanorod and SnO2 sensor is tested for varied concentrations (30–200 ppm) of linalool. The optimal temperature for linalool sensing is found to be 100 °C. The performance enhancement of the composite ZnO nanorod and SnO2 sensor is observed when decorated with Pt. The sensor stability is evaluated by performing a repeatability test over a period of about six months and %RSD of sensitivity is found to be 3.63%. The results are discussed based on fundamental investigation and existing theories.