Study of photocatalytic degradation of environmentally harmful phthalate esters using Ni-doped TiO2 nanoparticles
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Undoped and Ni-doped TiO2 nanoparticles are synthesized using sol–gel technique. The physical, structural, optical and thermal properties of the samples are investigated using X-ray powder diffraction, Fourier transform infrared spectroscopy, transmittance electron microscopy, UV–visible diffuse reflectance and thermogravimetric analysis. The photocatalytic activity of the samples is investigated by the photocatalytic degradation of phthalate esters. Phthalate esters have been considered as endocrine disrupting compounds. Ni-doped TiO2 samples show better photocatalytic activity as compared to undoped TiO2 sample. The greater photocatalytic activity of doped samples as compared to undoped TiO2 can be attributed to the production of more number of electron–hole pairs in doped samples.
KeywordsSol–gel process X-ray methods Optical properties TiO2 Photocatalytic activity
The authors are thankful to Dr. Gurbinder Kaur for her help in analyzing the results. Authors are also thankful to UGC for financial help under meritorious fellowships in reference to Letter No. F.4-1/2006/(BSR)/7-304/2010(BSR).
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