tailieunhanh - Báo cáo hóa học: " Controlled Growth of WO3 Nanostructures with Three Different Morphologies and Their Structural, Optical, and Photodecomposition Studies"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Controlled Growth of WO3 Nanostructures with Three Different Morphologies and Their Structural, Optical, and Photodecomposition Studies | Nanoscale Res Lett 2009 4 1335-1342 DOI s11671-009-9402-y NANO EXPRESS Controlled Growth of WO3 Nanostructures with Three Different Morphologies and Their Structural Optical and Photodecomposition Studies S. Rajagopal D. Nataraj D. Mangalaraj Yahia Djaoued Jacques Robichaud O. Yu. Khyzhun Received 2 June 2009 Accepted 17 July 2009 Published online 4 August 2009 to the authors 2009 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 2 Fe 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 S. Rajagopal D. Nataraj El Thin Film Nanomaterials Laboratory Department of Physics Bharathiar University Coimbatore 641 046 India e-mail D. Mangalaraj Department of Nanoscience and Technology Bharathiar University Coimbatore 641 046 India Y. Djaoued J. Robichaud Laboratoire de Micro-Spectroscopies Raman et FTIR Universite de Moncton-Campus de Shippagan 218 boul. . Gauthier Shippagan NB E8S 1P6 Canada O. Yu. Khyzhun Department of Structural Chemistry of Solids Frantsevych Institute for Problems of Materials Science National Academy of Sciences of Ukraine 3 Krzhyzhanivsky Street 03142 Kyiv .

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