Photocatalytic properties of h-WO{sub 3} nanoparticles obtained by annealing and h-WO{sub 3} nanorods prepared by hydrothermal method

Journal Article · Fri Mar 25 00:00:00 EDT 2016 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4944193· OSTI ID:22590985

Nagy-Kovács, Teodóra ^[1]; Lukács, István ^[2]

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1. Budapest University of Technology and Economics, Department of Inorganic and Analytical Chemistry, Szent Gellért tér 4, Budapest, H-1111 (Hungary)
2. Hungarian Academy of Sciences, Research Centre for Energy, Institute of Technical Physics and Materials Science, H-1121 Budapest, Konkoly Thege M. út 29-33 (Hungary)

In the present study, two different methods for preparing hexagonal WO{sub 3} (h-WO{sub 3}) photocatalysts were used - controlled thermal decomposition and hydrothermal synthesis. WO{sub 3} nanoparticles with hexagonal structure were obtained by annealing (NH{sub 4}){sub x}WO{sub 3-y} at 500 °C in air. WO{sub 3} nanorods were prepared by a hydrothermal method using sodium tungstate Na{sub 2}WO{sub 4}, HCl, (COOH){sub 2} and NaSO{sub 4} precursors at 200 °C. The formation, morphology, structure and composition of the as-prepared nanoparticles and nanorods were studied by powder X-ray diffraction (XRD), transmission electron microscopy (TEM), and scanning electron microscopy combined with energy-dispersive X-ray spectroscopy (SEM-EDX). The photocatalytic activity of the h-WO{sub 3} nanoparticles and nanorods was studied by decomposing methyl orange in aqueous solution under UV light irradiation.

• OSTI ID: 22590985
• Journal Information: AIP Conference Proceedings, Vol. 1722, Issue 1; Conference: BPU-9: 9. international physics conference of the Balkan Physical Union, Istanbul (Turkey), 24-27 Aug 2015; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANNEALING
AQUEOUS SOLUTIONS
HEXAGONAL LATTICES
HYDROTHERMAL SYNTHESIS
IRRADIATION
METHYL ORANGE
MORPHOLOGY
NANOPARTICLES
NANOSTRUCTURES
PHOTOCATALYSIS
POWDERS
SCANNING ELECTRON MICROSCOPY
SODIUM SULFATES
SODIUM TUNGSTATES
TRANSMISSION ELECTRON MICROSCOPY
TUNGSTEN OXIDES
ULTRAVIOLET RADIATION
X-RAY DIFFRACTION
X-RAY SPECTROSCOPY