Enhancement of photocatalytic properties of Bi{sub 2}WO{sub 6} nanoparticles by Pt deposition

Journal Article · Sun Sep 01 00:00:00 EDT 2013 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2013.05.062· OSTI ID:22341799

Aazam, E. S. ^[1]

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1. Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589 (Saudi Arabia)

Graphical abstract: - Highlights: • Pt/Bi{sub 2}WO{sub 6} was used for photocatalytic degradation of methyl orange dye. • Photocatalytic degradation was dependent on wt% of Pt reaction time, and weight of catalyst. • Kinetic study revealed that the photocatalytic degradation of methyl orange dye followed the first order. • Catalyst re-use revealed the present photocatalyst remain effective and active after five cycles. - Abstract: Bi{sub 2}WO{sub 6} nanoparticles were prepared using a hydrothermal method, and Pt was immobilized on the surface of Bi{sub 2}WO{sub 6} via a photo-assisted deposition (PAD) method. The samples produced were characterized using X-ray diffraction, ultraviolet and visible spectroscopy, photoluminescence emission spectra, transmission electron microscopy, extended X-ray absorption fine structure, and surface area measurements. Furthermore, the catalytic performance of the Bi{sub 2}WO{sub 6} and Pt/Bi{sub 2}WO{sub 6} samples was examined in the degradation of methyl orange dye (MO) under visible light. The extended X-ray absorption fine structure (EXAFS) results, which showed the presence of peaks assigned to the Pt–Pt at approximately 2.50 Å, indicate the formation of nanoscale Pt features. The UV–vis spectral analysis detected a red shift after loading the Pt into the Bi{sub 2}WO{sub 6}. The maximum degradation efficiency achieved was 100% with 0.3 Pt/Bi{sub 2}WO{sub 6} as the photocatalyst after a 30-min reaction time. The catalyst could be reused without any loss in activity for the first five cycles.

• OSTI ID: 22341799
• Journal Information: Materials Research Bulletin, Vol. 48, Issue 9; Other Information: Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
77 NANOSCIENCE AND NANOTECHNOLOGY
ABSORPTION
ABSORPTION SPECTROSCOPY
BISMUTH TUNGSTATES
CATALYSTS
DEPOSITION
EFFICIENCY
EMISSION SPECTRA
FINE STRUCTURE
HYDROTHERMAL SYNTHESIS
METHYL ORANGE
NANOPARTICLES
NANOSTRUCTURES
OXIDES
PHOTOCATALYSIS
PHOTOLUMINESCENCE
TRANSMISSION ELECTRON MICROSCOPY
X RADIATION
X-RAY DIFFRACTION
X-RAY SPECTROSCOPY