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Synthesis and analysing the structural, optical, morphological, photocatalytic and magnetic properties of TiO 2 and doped (Ni and Cu) TiO 2 nanoparticles by sol–gel technique

Publication Type : Journal Article

Publisher : Applied Physics A: Materials Science and Processing

Source : Applied Physics A: Materials Science and Processing, Springer Verlag, Volume 125, Number 5 (2019)

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Keywords : Aromatic compounds, Crystallite size, degradation, Degradation efficiency, Elemental compositions, Energy gap, Magnetic applications, Methylene blue dye, Micro-Raman analysis, Morphology, Nanomagnetics, Nanoparticles, Photocatalysis, Photocatalytic activity, Photocatalytic application, Pollution, Red Shift, Saturation magnetization, Sols, Surface morphology, Synthesis (chemical), Synthesis process, TiO2 nanoparticles, Titanium dioxide, Visible radiations, X ray diffraction

Campus : Coimbatore

School : School of Engineering

Department : Sciences

Year : 2019

Abstract : In the present work, Ni 2+ and Cu 2+ ions are doped with TiO 2 using sol–gel technique. The effects of Ni and Cu doping in TiO 2 matrix are characterized by XRD, Micro-Raman, FTIR, UV–DRS, PL, and FESEM with EDS. Furthermore, it is analyzed for photocatalytic activity and magnetic applications. From XRD analysis, it is observed that the peaks corresponding to the planes match with the JCPDS data [anatase: 89-4203] of TiO 2 . The crystallite size of the doped samples is found to be greater than that of TiO 2 . Micro-Raman analysis shows the confirmation of anatase phase of TiO 2 . FTIR analysis confirms the presence of functional groups which are presented in the prepared samples. From UV–DRS, the band-gap values of TiO 2 and doped TiO 2 (Ni 2+ , Cu 2+ ) are found to be 3.25, 2.48, and 1.25 eV. Photoluminescence (PL) results show an emission edge of Ni- and Cu-doped TiO 2 is red shifted which is due to the vacancies of titanium and oxygen imported subsequently during doping. The surface morphology and the elemental composition of Ni- and Cu-doped TiO 2 nanoparticles are also analyzed. The photocatalytic activity of all the prepared samples are assessed by methylene blue dye as testing pollutant and visible radiation. The test reveals that Cu–TiO 2 , Ni–TiO 2 , and TiO 2 show the degradation efficiency of 68.14, 61.04, and 33.32%, thereby showing that the doped TiO 2 are more efficient in degrading the pollutant and can be applied for future photocatalytic applications. From VSM analysis, the saturation magnetization of Ni–TiO 2 and Cu–TiO 2 is found to be weak and can be improved by the synthesis process and the proportion of dopant. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.

Cite this Research Publication : T. Raguram and Dr. Rajni K. S., “Synthesis and analysing the structural, optical, morphological, photocatalytic and magnetic properties of TiO 2 and doped (Ni and Cu) TiO 2 nanoparticles by sol–gel technique”, Applied Physics A: Materials Science and Processing, vol. 125, 2019.

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