Hydrothermal growth of overlapping ZnO nanorod arrays on the porous substrate and their H2 gas sensing

A sigh-performance hydrogen gas sensor based on Ag/Pd nanoparticle-functionalized ZnO nanoplates

“…18,19 Recently, ZnO nanostructures have also been used to detect H 2 gas leaks, where the ZnO nanorods exhibited a low response of 9.2 to 1000 ppm of H 2 at 225 °C. 20 However, pure ZnO-based sensors showed low sensitivity and poor selectivity. Thus, many signicant studies have been performed to overcome these limitations.…”

“…21 One of the techniques that can remarkably improve the four factor "S" sensitivity, selectivity, stability, and response speeds of gas sensors is the use of noble metals to functionalize the surface of a metal oxide by utilizing the spillover effect and unique catalytic property of these nanoparticles. [19][20][21] For instance, Kim et al 22 synthesized Pd-decorated ultrathin ZnO nanosheets in detecting hydrogen in a gaseous mixture with benzene. ZnO thin lm decorated with Pt nanoparticles was used to detect H 2 gas in the mixture with humidity.…”