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Author Fadhalaoui, Amor ♦ Dhaouadi, Hassouna ♦ Marouani, Houda ♦ Kouki, Abdessalem ♦ Madani, Adel ♦ Rzaigui, Mohamed
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ ABSORPTION SPECTROSCOPY ♦ ACTIVATION ENERGY ♦ CERIUM PHOSPHATES ♦ CHROMIUM COMPOUNDS ♦ CONCENTRATION RATIO ♦ ELECTRIC CONDUCTIVITY ♦ ENERGY GAP ♦ FREQUENCY DEPENDENCE ♦ HYDROTHERMAL SYNTHESIS ♦ IMPEDANCE ♦ NANOMATERIALS ♦ NANOSTRUCTURES ♦ OPTICAL PROPERTIES ♦ PHOTOCATALYSIS ♦ PHOTOVOLTAIC EFFECT ♦ SOLID OXIDE FUEL CELLS ♦ TRANSMISSION ELECTRON MICROSCOPY ♦ X-RAY DIFFRACTION
Abstract Graphical abstract: The Cr{sub x}Ce{sub 1−x}PO{sub 4} (x = 0.00, 0.08, 0.10 and 0.20) nanorods synthesized under hydrothermal conditions. - Highlights: • Cr{sub x}Ce{sub 1−x}PO{sub 4} (x = 0.00–0.20) nanorods were synthesized by hydrothermal method. • Mean crystallite size of the products decreases with Cr-content. • Obvious improvements of the electrical conductivity comparatively to CePO4. - Abstract: Cr{sub x}Ce{sub 1−x}PO{sub 4} (x = 0.00–0.20) nanorods were synthesized using the hydrothermal method. The as-prepared samples were characterized by X-ray diffraction (XRD), infrared absorption spectroscopy (IR) and transmission electron microscopy (TEM). The XRD results revealed the formation of a pure CePO{sub 4} hexagonal phase. TEM images confirmed the nano-size character of the as-prepared samples. Impedance spectroscopy analysis was used to analyze the electrical behavior of samples as a function of frequency at different temperatures. The increase of Cr-amount led to an increase in the total conductivities and decreased the activation energies (E{sub a} (x = 0.00) = 1.08 eV to E{sub a} (x = 0.20) = 0.80 eV). The optical properties of Cr{sub x}Ce{sub 1−x}PO{sub 4} nanomaterials were investigated using UV–vis spectroscopy. The band-gap energy values decreased with increasing Cr-content showing a red-shift trend. The improvement of the electrical conductivity and optical properties makes the Cr{sub x}Ce{sub 1−x}PO{sub 4} nanomaterials possible candidates to be used as electrolytes in solid oxide fuel cells, in photocatalytic and photovoltaic applications.
ISSN 00255408
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-01-15
Publisher Place United States
Journal Materials Research Bulletin
Volume Number 73


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