Simple Co-Precipitation Synthesis and Characterization Studies of La1-xNixVO3 Perovskites Nanostructures for Humidity Sensing Applications

Ni2+-doped LaVO3 perovskites nanostructures were successfully prepared by a simple coprecipitation method. Powder X-ray diffraction (XRD) pattern confirms that all compositions crystallize with orthorhombic LaVO3 perovskites structure. The lattice parameter decreases with increase in Ni2+ content resulting in the reduction of lattice strain in LaVO3. High resolution scanning electron microscope (HR-SEM) images revealed that the as-prepared samples are crystalline with particle size distribution in 142-250 nm range. The BET studies revealed the surface area of the required samples. The samples were subjected to humidity sensing studies by solid-state electrical conductance studies. The studies revealed that La0.4Ni0.6VO3 is a good candidate for humidity sensors with a higher sensitivity factor (S-f) of 15623.02. The higher S-f of La0.4Ni0.6VO3 is due to the larger surface area of the sample.