The Sensitizing Effect of Enhanced NO2 Gas Sensing at Near-Room Temperature Using Pd-Decorated VO2 Nanowires

Modification of nanostructures using metal nanoparticles is an efficient strategy for enhancing the performance of gas sensing. In this paper, a VO2@Pd nanowires gas sensor was synthesized using a combination of hydrothermal and annealing methods. The content of Pd in the as-prepared products was successfully controlled by adjusting the reaction parameters. The morphology and formation mechanism of VO2 nanostructures were systematically evaluated. The response value of VO2@Pd nanowires is 31.94 towards 5 ppm of NO2, which is about 38.75