Hydrogen sensing properties of Pd loaded TiO2 nanorods

Authors : Serkan BÜYÜKKÖSE

Pages : 118-130

View : 24 | Download : 11

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :The hydrogen sensing performance of palladium insert ignore into journalissuearticles values(Pd); catalyst loaded TiO2nanorods based sensors wereinvestigated. TiO2nanorods were grown on Al2O3substrate by a facile hydrothermal process. TiO2nanorods insert ignore into journalissuearticles values(NRs);were functionalized with Pd metal by RF magnetron sputtering. Samples were characterized by X-ray diffraction insert ignore into journalissuearticles values(XRD);and scanning electron microscopy insert ignore into journalissuearticles values(SEM); techniques for structural and morphological analysis. Sensor measurementstoward H2and some volatile organic compounds insert ignore into journalissuearticles values(VOCs); such as acetone, ethanol, xylene and toluene were performedby varying gas concentrations at different temperatures. The sensors were found to exhibit excellent sensitivities towardsdifferent hydrogen concentrations ranging from 25 to 1000 ppm in air. The effects of different operating temperatureson the sensing performance of the devices were studied in the range of 100–200◦C. It was observed that the 2 nm Pd–loaded and 4 nm Pd-loaded sensors were approximately 12 and 44 times more sensitive than the pristine TiO2nanorodssensor, respectively. The effect of temperature dependence on sensor response and the influence of the metal loading forhydrogen sensing are presented and discussed
Keywords : Chemiresitive gas sensor, H2sensor, TiO2nanorods, Pd loading, surface functionalization, surfacemodification