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

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 0.3more » 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.« less
Authors:
 [1] ;  [2] ;  [1]
  1. Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589 (Saudi Arabia)
  2. (CMRDI), P.O. Box 87, Helwan, Cairo (Egypt)
Publication Date:
OSTI Identifier:
22341799
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 48; Journal 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)
Country of Publication:
United States
Language:
English
Subject:
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