Controlled Growth of WO₃ Nanostructures with Three Different Morphologies and Their Structural, Optical, and Photodecomposition Studies
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. Orthorhomb...
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Published in | Nanoscale research letters Vol. 4; no. 11; pp. 1335 - 1342 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
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Heidelberg
New York : Springer-Verlag
01.11.2009
Springer Nature B.V |
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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. |
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AbstractList | Tungsten trioxide (WO3) nanostructures were synthesized by hydrothermal method using sodium tungstate (Na^sub 2^WO^sub 4^·2H2O) alone as starting material, and sodium tungstate in presence of ferrous ammonium sulfate [(NH^sub 4^)^sub 2^Fe(SO^sub 4^)^sub 2^·6H2O] or cobalt chloride (CoCl^sub 2^·6H2O) as structure-directing agents. Orthorhombic WO3 having a rectangular slab-like morphology was obtained when Na^sub 2^WO^sub 4^·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. 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. |
Author | Robichaud, Jacques Rajagopal, S Khyzhun, O. Yu Mangalaraj, D Nataraj, D Djaoued, Yahia |
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Title | Controlled Growth of WO₃ Nanostructures with Three Different Morphologies and Their Structural, Optical, and Photodecomposition Studies |
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