التفاصيل البيبلوغرافية
| العنوان: |
Structural, optical and photoluminescence studies of sol-gel synthesized pure and iron doped TiO2 photocatalysts. |
| المؤلفون: |
Komaraiah, Durgam1 (AUTHOR) dkumarou@gmail.com, Radha, Eppa1 (AUTHOR), Kalarikkal, Nandakumar2 (AUTHOR), Sivakumar, J.1 (AUTHOR), Ramana Reddy, M.V.1 (AUTHOR), Sayanna, R.1 (AUTHOR) |
| المصدر: |
Ceramics International. Dec2019:Part B, Vol. 45 Issue 18, p25060-25068. 9p. |
| مصطلحات موضوعية: |
*PHOTOLUMINESCENCE, *AZO dyes, *TRANSMISSION electron microscopes, *METHYLENE blue, *SCANNING electron microscopes, *VISIBLE spectra, *REFLECTANCE spectroscopy, *IRON |
| مستخلص: |
Pure and Iron doped TiO 2 nanoparticles were synthesized using the sol-gel method. These materials were characterized by X-ray diffractometer (XRD), high-resolution transmission electron microscope (HR-TEM), scanning electron microscope (SEM), Energy dispersive X-ray (EDX), UV–Vis diffuse reflectance spectroscopy (DRS), Fourier-transform infrared (FTIR), Raman and fluorescence spectrometer. XRD analysis revealed that all the samples were a single phase with anatase nanocrystallite structures. The crystallite size of titania reduced from 9.64 nm to 7 nm with Fe doping. The HRTEM images of the TiO 2 and 3% Fe doped TiO 2 have revealed that all the particles have a spherical shape with an average particle size of 10 nm and 8 nm respectively. The characteristic peak at 482 cm−1 of the Ti O bond stretching vibrations can be evidently observed from FTIR analysis. The Raman blue shift was found in the Fe doped TiO 2 samples. Fe-doped TiO 2 nanoparticles showed a significant red-shift in band edge as compared with pure TiO 2 nanoparticles. The redshift of band gap was detected in Fe doped TiO 2 nanoparticles. The photoluminescence (PL) emission intensity of Fe doped TiO 2 nanoparticles decreases with an increase in Fe doping concentration. The photocatalytic efficiencies of the Fe-doped TiO 2 nanoparticles have shown a strong photocatalytic activity (PCA) response. At constant irradiation time, the Fe-doped titania nanoparticles display more catalytic activity compared to undoped TiO 2. The photodegradation efficiencies typically decline with an increase in the concentration of Fe+3 doping for the decolorization of methylene blue (MB) under visible light irradiation. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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