Au decorated WO₃-SnO₂ nanocomposite for enhanced benzene vapors sensing performance

Abstract

In this present work, we synthesized WO3-SnO2 and Au doped WO3-SnO2 nanocomposite by hydrothermal method. The optical characterization has been done by UV/Vis spectroscopy to determine the band gap of pure and gold (Au) doped WO3-SnO2. Fourier transformed Infra red (FTIR) spectroscopy has been used to confirm the chemical bonding between Au and WO3-SnO2 nanocomposite. The X-ray Diffraction (XRD) technique was used to study the structural aspects of prepared materials. Field Emission Scanning Electron Microscopy (FESEM) has been used to investigate morphological characteristics of as prepared nanocomposite. The doping of Au was further confirmed by Energy-Dispersive X-ray spectroscopy (EDS) technique. The sensing properties have been studied from the I-V measurement of WO3-SnO2/Au nanocomposite for Benzene. The sensing parameters such as sensitivity (response), operating temperature and response and recovery time were calculated for benzene vapors.

Enhanced Acetone Sensing Based on Group-11 Metal (Cu, Ag, and Au) Nanoparticles Embedded in Graphitic Carbon Nitride (gCN)

“…The sensor response was calculated using Equation (3) (for pure gCN) and Equation (4) (for group-11 TM-embedded gCN) [44,45]:…”