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Title: Structural and electrical properties of TiO{sub 2}/ZnO core–shell nanoparticles synthesized by hydrothermal method

TiO{sub 2}/ZnO core–shell nanoparticles were successfully synthesized by hydrothermal method in two stages: first stage is the hydrothermal synthesis of ZnO nanoparticles and second stage the obtained ZnO nanoparticles are encapsulated in TiO{sub 2}. The obtained ZnO, TiO{sub 2} and TiO{sub 2}/ZnO core–shell nanoparticles were investigated by means of X-ray diffraction, transmission electron microscopy, Brunauer, Emmett, Teller and resistance measurements. X-ray diffraction analysis revealed the presence of both, TiO{sub 2} and ZnO phases in TiO{sub 2}/ZnO core–shell nanoparticles. According to transmission electron microscopy images, ZnO nanoparticles have hexagonal shapes, TiO{sub 2} nanoparticles have a spherical shape, and TiO{sub 2}/ZnO core–shell nanoparticles present agglomerates and the shape of particles is not well defined. The activation energy of TiO{sub 2}/ZnO core–shell nanoparticles was about 101 meV. - Graphical abstract: Display Omitted - Highlights: • TiO{sub 2}/ZnO core–shell nanoparticles were synthesized by hydrothermal method. • TiO{sub 2}/ZnO core–shell nanoparticles were investigated by means of XRD, TEM and BET. • Electrical properties of TiO{sub 2}/ZnO core–shell nanoparticles were investigated. • The activation energy of TiO{sub 2}/ZnO core–shell nanoparticles was about E{sub a} = 101 meV.
Authors:
;  [1] ;  [2] ;  [1] ;  [1] ;  [3] ;  [4]
  1. National Institute for Research and Development in Electrochemistry and Condensed Matter, Department of Condensed Matter, 1 Plautius Andronescu St., 300224 Timisoara (Romania)
  2. Faculty of Industrial Chemistry and Environmental Engineering, “Politehnica” University of Timisoara, 6 Vasile Parvan Avenue, 300223 Timisoara (Romania)
  3. (Romania)
  4. Institute of Electronic Engineering and Nanotechnologies, “D. Ghiţu” of the Academy of Sciences of Moldova, Academiei str. 3, Chisinau MD-2028, Academiei str. 3, Chisinau MD-2028 (Moldova, Republic of)
Publication Date:
OSTI Identifier:
22476060
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Characterization; Journal Volume: 101; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; ACTIVATION ENERGY; ELECTRICAL PROPERTIES; HYDROTHERMAL SYNTHESIS; NANOPARTICLES; TITANIUM OXIDES; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION; ZINC OXIDES