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Structural, Optical and Photocatalytic Properties of Anatase/Rutile TiO₂ Nanoparticles

Eppa Radha*, Durgam Komaraiah**, M. V. Ramana Reddy***, R. Sayanna****, J. Sivakumar*****

*_** PhD Scholar, Department of Physics, Osmania University, Hyderabad, Telangana, India.

***, ***** Professor, Department of Physics, Osmania University, Hyderabad, Telangana, India.

**** Professor (Rtd), Department of Physics, Osmania University, Hyderabad, Telangana, India.

Periodicity:October - December'2018
DOI : https://doi.org/10.26634/jms.6.3.15318

Abstract

Titania photocatalyst was synthesized by sol-gel method using titanium tetra isopropoxide (TTIP) as a precursor. The TiO₂ was annealed at 600^oC and 800^oC and then characterized by X-ray diffractometer (XRD), UV-Vis DRSand FTIR spectroscopy. X-ray diffraction analysis confirms that the TiO₂ annealed at 600^oC was found to be anatase phase and annealed at 800^oC was found to be rutile phase. The crystalline size of anatase TiO₂ is about 17 nm and rutile is about 50nm. The characteristic IR bandobserved from 400 to 900 cm⁻¹corresponds to the Ti–O bond stretching vibrations can be clearly observed from FTIR analysis. The indirect band gap energy of rutile TiO₂is about 2.83 eV and anatase TiO₂is about 3.00 eV.Photocatalytic activity of TiO₂ was evaluated by photocatalytic degradation of methylene blue (MB) dye in aqueous solution as a model pollutant under visible light irradiation. Aanatase TiO₂ exhibited more efficient PCA than the rutile TiO₂. After 4h photodegradation of MB solution was obtained to 96% foranatase TiO₂ and 90% for rutile. The small crystallite size and anatase phase probably resulted in the high photocatalytic activity of TiO₂.

Keywords

TiO₂ Nanoparticles, Photocatalytic Degradation, Methylene Blue.

How to Cite this Article?

Radha, E., Komaraiah, D., Reddy, M. V. R., Sayanna, R., and Sivakumar, J. (2018). Structural, Optical and Photocatalytic Properties of Anatase/Rutile TiO₂ Nanoparticles. i-manager’s Journal on Material Science, 6(3), 43-49. https://doi.org/10.26634/jms.6.3.15318

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Structural, Optical and Photocatalytic Properties of Anatase/Rutile TiO2 Nanoparticles