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Thermoluminescence properties of copper-doped TiO2 nanoparticles synthesised using co-precipitation method for
Kankanady Sharmila1, Nimitha S Prabhu2, Sudha D Kamath2
1Centre for Application of Radioisotope and Radiation Technology (CARRT), Mangalore University, Mangalagangotri 574199, India.
Abstract:
In this work, copper (Cu)-doped titanium dioxide (TiO2) nanoparticles were prepared by co-precipitation. For studying the morphological properties, the copper doped titanium dioxide (TiO2:Cu) nanocrystalline structures were characterised through powder X-ray diffraction and field emission scanning electron microscopy. The prepared TiO2:Cu nanoparticles were annealed at two temperatures, namely, copper doped titanium dioxide annealed at 723 K temperayure (TC1) and copper doped titanium dioxide annealed at 1073 K temperayure (TC2). The annealed samples were exposed to gamma radiation of 10-Gy-to-25-kGy doses. Thermoluminescence and dosimetric properties were evaluated using a thermoluminescent dosemeter reader. The glow curves of the TiO2:Cu nanoparticles were analysed. The thermoluminescence (TL) response of samples exhibited good linearity between 100 Gy and 10 kGy with high sensitivity of 1755.25 (TC1) and 5587.06 (TC2) counts g-1Gy-1 and a minimum detectable dose of 2.9666 Gy (TC1) and 0.4892 Gy (TC2). The fading of signals was observed by 12% for TC1 and 10% for TC2 samples after a week of storage.
