Synthesis and Gas-Sensing Performances of MnO-Decorated CrO Nanoparticle for HS Detection.

MnO decorated with CrO was prepared via a cost-effective and straightforward photolysis method and utilized as an HS gas sensor. The nanocomposite exhibited excellent chemical sensing properties toward HS gas at 200°C, achieving a sensitivity of 89.93. A proposed sensing mechanism highlights the synergistic roles of MnO and CrO in gas detection. This study underscores the potential of MnO-CrO composites in industrial and environmental monitoring applications, offering a reliable and efficient solution for detecting hazardous gases.