LAUSR

In this present investigation, a hybrid core–shell nanostructure with uniform nanocrystalline shaped NiO/ZnO (NZO) were synthesized for the acetone chemical gas sensing study. The hybrid semiconductor n-ZnO/p-NiO nanostructures were prepared by simple wet-chemical route trailed by spin coated thin films process. X-ray diffraction analysis was revealed the both well-crystalline structural phases of NZO exhibited along with predominant NiO phase appeared. HR-TEM (high-resolution transmission electron microscope) observation was showed core–shell shaped hexagonal crystal structure and lattice fringes confirmed the presence of ZnO nanoparticles. In situ laboratory acetone chemical vapor was employed for gas sensing behavior of ZnO/NiO-700 °C. It showed superior gas sensing of acetone (500 ppm) along with rapid recovery response (18 s). Hence, ZnO/NiO nanostructures are excellent candidate for acetone chemical gas sensing applications.