Pd- and PdO-Decorated TiO2 Nanospheres: Hydrogen Sensing Properties under Visible Light Conditions at Room Temperature

As a promising sustainable and clean energy source for the future, hydrogen plays an important role. Due to its high flammability explosive nature of gas, it is crucial employ reliable sensors that can detect presence gas in air at room temperature (RT). By utilizing light, working such be reduced whilst simultaneously enhancing sensing performance. In this study, have been fabricated introduces nano-Schottky junctions (Pd–TiO2) via facile chemical method p–n heterojunctions (PdO–TiO2), through both hydrothermal methods, with mean Pd nanoparticle (NP) diameter 4.98 ± 0.49 nm 4.29 0.45 nm, respectively. The hydrothermally treated Pd-decorated TiO2 nanosphere (HPT NS) shows response 100.88% toward 500 ppm faster recovery (77 s 470 s, respectively). Meanwhile, untreated (PT) NSs show 100.29% slow times (240 3146 respectively) 30 °C under 565 visible light bias mV. experimental results confirm introducing metallic PdO onto open novel approach detecting light-induced using low voltage bias.