title: Enhancing performances of a resistivity-type hydrogen sensor based on Pd/SnO2/RGO nanocomposites.
abstract: Palladium/tin oxide/reduced graphene oxide (Pd/SnO2/RGO) nanocomposites with Pd and SnO2crystalline nanoparticles of high density and uniformity coated on RGO have been synthesized by a two-step reduction process. A novel hydrogen (H2) sensor based on Pd/SnO2/RGO nanocomposites was fabricated by placing Pd/SnO2/RGO nanocomposites onto a pair of gold electrodes. The Pd/SnO2/RGO nanocomposite-based sensor exhibited higher responses than Pd/RGO to H2because the introduction of SnO2nanoparticles enhances H2adsorption and forms a P-N junction with RGO. The sensor shows a high response of 55% to 10 000 ppm H2, and a low detection limit, fast response, good selectivity and repeatability due to a combination effect of the Pd and SnO2nanoparticles. The studies provide a novel strategy for great potential applications of graphene-based gas sensors.
authors.affiliation: College of Mechanical Engineering, Donghua University, Shanghai 201620, People's Republic of China.
authors.forename: Yitian
authors.initials: Y
authors.lastname: Peng
authors.forename: Lulu
authors.initials: L
authors.lastname: Zheng
authors.forename: Kun
authors.initials: K
authors.lastname: Zou
authors.forename: Cong
authors.initials: C
authors.lastname: Li