title: Effective decoration of Pd nanoparticles on the surface of SnO2 nanowires for enhancement of CO gas-sensing performance.
abstract: Decoration of noble metal nanoparticles (NPs) on the surface of semiconducting metal oxide nanowires (NWs) to enhance material characteristics, functionalization, and sensing abilities has attracted increasing interests from researchers worldwide. In this study, we introduce an effective method for the decoration of Pd NPs on the surface of SnO2 NWs to enhance CO gas-sensing performance. Single-crystal SnO2 NWs were fabricated by chemical vapor deposition, whereas Pd NPs were decorated on the surface of SnO2 NWs by in situ reduction of the Pd complex at room temperature without using any linker or reduction agent excepting the copolymer P123. The materials were characterized by advanced techniques, such as high-resolution transmission electron microscopy, scanning transmission electron microscopy, and energy-dispersive X-ray spectroscopy. The Pd NPs were effectively decorated on the surface of SnO2 NWs. As an example, the CO sensing characteristics of SnO2 NWs decorated with Pd NPs were investigated at different temperatures. Results revealed that the gas sensor exhibited excellent sensing performance to CO at low concentration (1-25ppm) with ultrafast response-recovery time (in seconds), high responsivity, good stability, and reproducibility.
authors.affiliation: International Training Institute for Materials Science, Hanoi University of Science and Technology, No. 1 Dai Co Viet Road, Hanoi, Viet Nam.
authors.forename: Do Dang
authors.initials: do D
authors.lastname: Trung
authors.affiliation: International Training Institute for Materials Science, Hanoi University of Science and Technology, No. 1 Dai Co Viet Road, Hanoi, Viet Nam. Electronic address: ndhoa@itims.edu.vn.
authors.forename: Nguyen Duc
authors.initials: ND
authors.lastname: Hoa
authors.affiliation: International Training Institute for Materials Science, Hanoi University of Science and Technology, No. 1 Dai Co Viet Road, Hanoi, Viet Nam.
authors.forename: Pham Van
authors.initials: PV
authors.lastname: Tong
authors.affiliation: International Training Institute for Materials Science, Hanoi University of Science and Technology, No. 1 Dai Co Viet Road, Hanoi, Viet Nam.
authors.forename: Nguyen Van
authors.initials: NV
authors.lastname: Duy
authors.affiliation: National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan.
authors.forename: T D
authors.initials: TD
authors.lastname: Dao
authors.affiliation: National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan.
authors.forename: H V
authors.initials: HV
authors.lastname: Chung
authors.affiliation: National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Nagao
authors.affiliation: International Training Institute for Materials Science, Hanoi University of Science and Technology, No. 1 Dai Co Viet Road, Hanoi, Viet Nam. Electronic address: hieu@itims.edu.vn.
authors.forename: Nguyen Van
authors.initials: NV
authors.lastname: Hieu
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D002248:Carbon Monoxide / Q000032:analysis*; D053768:Metal Nanoparticles / Q000737:chemistry*; D053770:Nanowires / Q000737:chemistry*; D010165:Palladium / Q000737:chemistry*; D017971:Tin Compounds / Q000737:chemistry*
chemical_list: D000393:Air Pollutants; D017971:Tin Compounds; D010165:Palladium; D002248:Carbon Monoxide; C045358:stannic oxide
keywords: CO gas sensor; Pd NPs decoration; SnO(2) nanowire