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Author Naceur, Benhadria ♦ Abdelkader, Elaziouti ♦ Nadjia, Laouedj ♦ Sellami, Mayouf ♦ Noureddine, Bettahar
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ ABSORPTION SPECTROSCOPY ♦ ANTIMONY COMPOUNDS ♦ BISMUTH COMPOUNDS ♦ CATALYSTS ♦ COBALT OXIDES ♦ CRYSTAL GROWTH ♦ CUBIC LATTICES ♦ ENERGY GAP ♦ HYDROGEN PEROXIDE ♦ HYDROXYL RADICALS ♦ IRRADIATION ♦ NANOSTRUCTURES ♦ PARTICLE SIZE ♦ PHOTOCATALYSIS ♦ PYROCHLORE ♦ RHODAMINES ♦ SCANNING ELECTRON MICROSCOPY ♦ SYNTHESIS ♦ VISIBLE RADIATION ♦ X-RAY DIFFRACTION
Abstract Graphical abstract: Heterogeneous photo Fenton process with dye sensitized mechanism of RhB by Bi{sub 1.56}Sb{sub 1.48}Co{sub 0.96}O{sub 7} compound. - Highlights: • Bi{sub 1.56}Sb{sub 1.48}Co{sub 0.96}O{sub 7} (BSCO) catalyst was synthesized by improved solid state reaction method. • BSCO/H{sub 2}O{sub 2}/UVA and BSCO/H{sub 2}O{sub 2}/SL catalyst systems exhibit excellent photocatalytic activities for rhodamine B. • The photocatalytic degradation was preceded via heterogeneous photo Fenton mechanism process. • ·OH radicals are the main reactive species for the degradation of RhB. - Abstract: Novel nanostructure pyrochlore Bi{sub 1.56}Sb{sub 1.48}Co{sub 0.96}O{sub 7} was successfully synthesized via solid state reaction method in air. The as-synthesized photocatalyst was characterized by X-ray diffraction, Scanning electron microscopy and UV–vis diffuse reflectance spectroscopy techniques. The results showed that the BSCO was crystallized with the pyrochlore-type structure, cubic crystal system and space group Fd3m. The average particle size and band gap for BSCO were D = 76.29 nm and E{sub g} = 1.50 eV respectively. Under the optimum conditions for discoloration of the dye: initial concentration of 20 mg L{sup −1} RhB, pH 7, 25 °C, 0.5 mL H{sub 2}O{sub 2} and BSCO/dye mass ration of 1 g L{sup −1}, 97.77 and 90.16% of RhB were removed with BSCO/H{sub 2}O{sub 2} photocatalytic system within 60 min of irradiation time under UVA- and SL irradiations respectively. Pseudo-second-order kinetic model gave the best fit, with highest correlation coefficients (R{sup 2} ≥ 0.99). On the base of these results, the mechanism of the enhancement of the discoloration efficiency was discussed. .
ISSN 00255408
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-02-15
Publisher Place United States
Journal Materials Research Bulletin
Volume Number 74


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