An Ultrasensitive Room-Temperature H?S Gas Sensor Based on 3D Assembly of Cu?O Decorated WS? Nanomaterial

Herein, we report for the first time on fabrication of a hybrid material consisting Cu 2 O nanoparticles-decorated multilayered tungsten disulfide nanostructures and demonstrate their remarkable gas sensing characteristics towards hydrogen sulfide gas. In step, continuous film WS2 was deposited directly commercial alumina substrate by adopting facile route combining aerosol-assisted chemical vapor deposition with H free atmospheric pressure CVD technique. For functionalization an additional step synthesis added where copper oxide nanoparticles were grown over as-grown at low temperature (i.e., 150 °C) using simple cost-effective The morphological, structural investigated FESEM, TEM, EDX spectroscopy. gas-sensing studies performed shows that this nanomaterial has excellent sensitivity (11-times increase in response compared to pristine WS sensor) moderate (150 °C). Additionally, sensor further enhances performance targeted even room (13-times sensor). Moreover, results obtained from humidity cross-sensitivity O-WS indicates superior (with negligible decrease response) as sensor, when ambient is increased 50%, which rarely found metal oxide-based sensors. This study could add significant research value domain.