Tailoring on p-type conductivity of nickel oxide nanostructures by palladium for the detection of 2-methoxy ethanol

The toxicity rate in the air is increasing due to the expelling of volatile organic compounds (VOCs) from different strata of day-to-day life after the commonization of industrialization and urbanization. Continuous exposure to VOCs adversely affects human health; thus, immediate detection of VOCs is inevitable to regulate the toxicity in atmosphere. The current research attempts to synthesize pure and Palladium-doped Nickel Oxide and scrutinizes the physicochemical, morphological, elemental, and gas sensing attributes of the prepared nanostructures. The nanosized particle formation and the effect of sintering temperature on shape and crystallite size are confirmed using XRD and SEM characterizations. Additionally, the XPS inspects the combined impact of doping and sintering temperature of the prepared nanoparticles and optimizes the exact temperature as 500 degrees C because of the enhancement in hole concentration. The Pd-NiO(500 degrees C) displays attractive sensing attributes, precisely, a high response of 4882 for 100 ppm C3H8O2 at room temperature. The sensor shows a quick response and recovery (3.68 s, 3.76 s) C3H8O2 alongside long-term repeatability and stability; it exhibits practical execution in real-time scenarios.

Automated summary

The toxicity rate in the air is increasing due to the release of volatile organic compounds (VOCs) from various aspects of daily life. The current research focuses on synthesizing and studying the properties of pure and Palladium-doped Nickel Oxide nanostructures for gas sensing applications. The optimized sensor shows high response and stability in detecting C3H8O2 (propanediol) at room temperature.