Nano Archive

Controlled Growth of WO3 Nanostructures with Three Different Morphologies and Their Structural, Optical, and Photodecomposition Studies

Rajagopal, S. and Nataraj, D. and Mangalaraj, D. and Djaoued, Yahia and Robichaud, Jacques and Khyzhun, O. Yu. (2009) Controlled Growth of WO3 Nanostructures with Three Different Morphologies and Their Structural, Optical, and Photodecomposition Studies. Nanoscale Research Letters, 4 (11). pp. 1335-1342.

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Official URL: http://www.springerlink.com/content/x872p2250r7127...

Abstract

Tungsten trioxide (WO3) nanostructures were synthesized by hydrothermal method using sodium tungstate (Na2WO4·2H2O) alone as starting material, and sodium tungstate in presence of ferrous ammonium sulfate [(NH4)2Fe(SO4)2·6H2O] or cobalt chloride (CoCl2·6H2O) as structure-directing agents. Orthorhombic WO3 having a rectangular slab-like morphology was obtained when Na2WO4·2H2O was used alone. When ferrous ammonium sulfate and cobalt chloride were added to sodium tungstate, hexagonal WO3 nanowire clusters and hexagonal WO3 nanorods were obtained, respectively. The crystal structure and orientation of the synthesized products were studied by X-ray diffraction (XRD), micro-Raman spectroscopy, and high-resolution transmission electron microscopy (HRTEM), and their chemical composition was analyzed by X-ray photoelectron spectroscopy (XPS). The optical properties of the synthesized products were verified by UV–Vis and photoluminescence studies. A photodegradation study on Procion Red MX 5B was also carried out, showing that the hexagonal WO3 nanowire clusters had the highest photodegradation efficiency.

Item Type:Article
Uncontrolled Keywords:Tungsten trioxide - Hydrothermal - Structure-directing chemicals - Nanowires - Nanorods - Photodecomposition
Subjects:Material Science > Nanochemistry
Material Science > Nanostructured materials
ID Code:7933
Deposited By:IoN
Deposited On:12 Jan 2010 16:06
Last Modified:12 Jan 2010 16:06

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