Structural, optical and morphological analyses of pristine titanium di-oxide nanoparticles - Synthesized via sol-gel route

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• 作者：P. Praveen ; G. Viruthagiri ; S. Mugundan ; N. Shanmugam
• 关键词：TiO2 ; Sol&ndash ; gel technique ; X-ray diffraction ; UV&ndash ; VIS-DRS ; Photoluminescence ; SEM with EDX
• 刊名：Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
• 出版年：3 January, 2014
• 年：2014
• 卷：117
• 期：Complete
• 页码：622-629
• 全文大小：949 K

文摘

Pure titanium di-oxide nanoparticles (TiO₂) were synthesized by sol-gel technique at room temperature with appropriate reactants. The synthesis of anatase phase TiO₂ nanoparticles was achieved by tetraisopropyl orthotitanate and 2-propanol as common starting materials and the product was annealed at 450 掳C for 4 h. The synthesized product was characterized by X-ray diffraction analysis (XRD), Fourier transform infrared spectroscopy (FTIR), UV-VIS-Diffuse reflectance spectroscopy (DRS), Photoluminescence (PL) spectroscopy and Scanning electron microscopy (SEM) with Energy dispersive X-ray (EDX) analysis. XRD pattern confirmed the crystalline nature and tetragonal structure of synthesized composition. Average grain size was determined from X-ray line broadening, using the Debye-Scherrer relation. The functional groups present in the sample were identified by FTIR spectroscopy. Diffuse reflectance measurement indicated an absorption band edge on UV-region. The allowed direct and indirect band gap energies, as well as the crystallite size of pure TiO₂ nanoparticles are calculated from DRS analysis. The microstructure and elemental identification were done by SEM with EDX analysis.