title: Fabricating and characterising ZnO-ZnS-Ag₂S ternary nanostructures with efficient solar-light photocatalytic activity.
abstract: ZnO-ZnS-Ag2S ternary nanostructures were prepared by a simple and low-cost chemical precipitation method. The sample was characterised by X-ray diffraction, energy-dispersive X-ray, UV-Vis-NIR, Raman and Fourier transform infrared spectroscopy. Morphology of the sample was studied by scanning electron microscopy and it was observed that ZnO nanoplates were covered with ZnS and Ag2S nanoparticles. A high resolution transmission electron microscope was used to obtain further information about the crystalline domains of the prepared ternary nanostructure. The Kramers-Kronig method and classical dispersion theory were utilised to study the optical properties of the sample in the far-infrared region. Photocatalytic activity of the prepared samples was also attained in the gas-solid phase by using a solar lamp (simulating outdoor lighting) and monitoring NOx degradation.
authors.affiliation: Department of Materials and Ceramic Engineering (DEMaC), CICECO, University of Aveiro, Campus Santiago, 3810-193 Aveiro, Portugal. zamiri.r@gmail.com.
authors.forename: R
authors.initials: R
authors.lastname: Zamiri
authors.forename: H Abbastabar
authors.initials: HA
authors.lastname: Ahangar
authors.forename: D M
authors.initials: DM
authors.lastname: Tobaldi
authors.forename: A
authors.initials: A
authors.lastname: Rebelo
authors.forename: M P
authors.initials: MP
authors.lastname: Seabra
authors.forename: M
authors.initials: M
authors.lastname: Shabani
authors.forename: J M F
authors.initials: JM
authors.lastname: Ferreira