The effect of synergistic interaction of ceria-doped copper oxide prepared by hydrothermal method as toxic gas sensor

The effect of introducing cerium oxide (CeO2) at 5% and 9% concentrations as dopants to improve the catalytic performance of the copper oxide (CuO) nanoparticles was studied using a hydrothermal technique. The seed layer is placed in an autoclave, usually made of Teflon, and heated with water for 10 hours at 100°C. The resulting films were characterized using X-ray diffraction (XRD), atomic force microscopy (AFM), and photoluminescence (PL). The grain size decrease as the doping concentration increases, while the roughness, and RMS increase. The sensor was developed to detect different concentrations of ammonia (NH3) gas. CuO at 9% of CeO2 sample exhibited the highest sensitivity about (48%) for NH3 gas at 1.5C.