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Title: Synthesis of MoO{sub 3} nanoparticles for azo dye degradation by catalytic ozonation

Highlights: • Synthesis of one-dimensional MoO{sub 3} nanostructures using hydrothermal, microwave, and sonochemical methods. • Sonochemical synthesized MoO{sub 3} presents the best efficiency for the dye removal by catalytic ozonation. • Efficient environmental remediation process. - Abstract: One-dimensional molybdenum trioxide nanostructures were prepared in three different approaches, including thermal, microwave, and sonochemical methods. The physicochemical properties of the obtained MoO{sub 3} nanoparticles were investigated by diffused reflectance spectroscopy, X-ray diffraction analysis, field emission scanning electron microscopy, high resolution transmission electron microscopy, and Brunauer–Emmett–Teller surface area analysis. Among the methods as investigated, sonochemical synthesis gave well-dispersed fine MoO{sub 3} nanoparticles compared with the other approaches. All the synthesized MoO{sub 3} nanostructures were examined for the catalytic ozonation to degrade azo dye in aqueous environment. Different performances were obtained for the catalyst prepared in different methods and the catalytic efficiencies were found to be the order of sonochemical, microwave, and then thermal methods. The sonochemical MoO{sub 3} catalyst allowed the total dye removal within 20 min and its good performance was justified according to their higher surface area with higher number of active sites that provide effective dye interaction for better degradation.
Authors:
;  [1] ;  [2] ; ;  [3] ;  [4] ;  [1]
  1. Department of Environmental Engineering and Science, Feng Chia University, Taiwan (China)
  2. Department of Material Science and Engineering, Feng Chia University, Taiwan (China)
  3. Department of Photonics, Feng Chia University, Taiwan (China)
  4. Department of Applied Mathematics, Taiwan (China)
Publication Date:
OSTI Identifier:
22420813
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 62; Other Information: Copyright (c) 2014 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; AZO DYES; CATALYSTS; COMPARATIVE EVALUATIONS; FIELD EMISSION; MICROWAVE RADIATION; MOLYBDENUM OXIDES; NANOPARTICLES; NANOSTRUCTURES; SCANNING ELECTRON MICROSCOPY; SPECTRAL REFLECTANCE; SURFACE AREA; SYNTHESIS; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION