Abstract
Cerium molybdate semiconductive nanoparticles were synthesized by the EDTA-citrate combined complexation method. Gel thermal degradation behavior, phase formation, morphology, composition and band gap of cerium molybdate powders were characterized by TG/DSC, XRD, SEM/EDS and DRS analysis, respectively. The nanoparticles were synthesized by fixing the pH of the reaction medium to 9, producing an organometallic gel which was heated to 230 oC obtaining a precursor powder. The precursors were calcined in a temperature range of 450 - 800 oC for 3 h. The cerium molybdate powders were characterized and the phase evolution, morphology and band gap changes with the increase of calcining temperature were investigated. It was observed that the calcining temperature directly influences the formation of the crystalline structure, appearance of other phases in the materials and the particle size
Highlights
Cerium molybdate (Ce2(MoO4)3) is an important yellow inorganic material of scheelite type with monoclinic crystalline structure that has been extensively studied by the scientific community due to its photoluminescent and photonics properties[1]
We report for the first time the synthesis of pure crystalline cerium molybdate powders using the EDTA-citrate complexing method at four different calcining temperatures, and we show the phase evolution of the powders, the modifications in the structure, morphology and in the band gap of the material
X-Ray diffraction (XRD) patterns revealed that the material calcined at 450 oC is not completely crystalline and exhibit single tetragonal structure at 500 oC, single monoclinic structure at 600 oC, and with subsequent increase of temperature to 800 oC, cerium oxides phases appear in the monoclinic structure
Summary
Cerium molybdate (Ce2(MoO4)3) is an important yellow inorganic material of scheelite type with monoclinic crystalline structure that has been extensively studied by the scientific community due to its photoluminescent and photonics properties[1]. It has been used as corrosion inhibitor in metallic alloys[2], photocatalyst in the decomposition of dyes[3], photocatalyst with antibacterial action[4] and many other applications. Titanium dioxide (TiO2) nanostructures have been systematically studied and have demonstrated high potential as photocatalysts under UV irradiation[6,7]. The limitation of having to work with a wavelength restricted to UV has given rise to new researches in the area, in order to develop materials with promising photocatalytic action within the visible spectrum of light
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
