Thermoluminescent characterization of HfO2:Tb3+ synthesized by hydrothermal route |
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| Institution: | 1. Centro de Investigación de Ciencia Aplicada y Tecnología Avanzada, IPN, Unidad Legaria, Avenida Legaria 694 Colonia Irrigación, 11500 México D.F., México;2. Instituto de Investigaciones en Materiales, UNAM, Circuito Exterior, Ciudad Universitaria, Coyoacán, 04510 México D.F., México;3. Departamento de Física, CINVESTAV, IPN, Apartado Postal 14-740, 07000 México D.F., México;1. Universidad Autónoma Metropolitana, Mexico;2. Universidad Autonoma de Zacatecas, Unidad Academica de Estudios Nucleares, MEXICO;3. Universidad Autónoma Metropolitana-Iztapalapa, MEXICO;1. College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, PR China;2. Shanghai Pinghe Bilingual School, Shanghai 201206, PR China;1. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, 31 Leninsky pr., Moscow, 119991, Russia;2. Saint Petersburg State University, Chemical Department, 26 Universitetskii pr., p/o Stary Peterhof, Saint Petersburg, 198504, Russia;1. Centro de Investigación y de Estudios Avanzados del IPN, Programa de Doctorado en Nanociencias y Nanotecnología, Av. Instituto Politécnico Nacional 2508, San Pedro Zacatenco, Gustavo A. Madero CDMX, 07360, Mexico;2. Universidad Tecnológica de México, UNITEC MÉXICO, Campus Ecatepec, Mexico;3. Centro de Investigación y de Estudios Avanzados del IPN, Departamento de Física, Av. Instituto Politécnico Nacional 2508, San Pedro Zacatenco, Gustavo A. Madero CDMX, 07360, Mexico;4. Cátedras CONACyT-Benemérita Universidad Autónoma de Puebla, Posgrado en Física Aplicada, Facultad de Ciencias Físico-Matemáticas, Av. San Claudio y Av. 18 sur, San Manuel Ciudad Universitaria, Puebla, Puebla, 72570, Mexico;5. ITTLA-Instituto Tecnológico de Tlalnepantla, Av. Instituto Tecnológico s/n, La Comunidad, Tlalnepantla de Baz, Estado de México, 54070, Mexico;6. Universidade de Franca, Av. Armando Salles Oliveira, 201, 14.404-600, Franca, SP, Brazil;1. Department of Physics, Sri Ranganathar Institute of Engineering and Technology, Coimbatore, Tamil Nadu, India;2. Department of Physics, Government Arts College, Udumalpet, Tamil Nadu, India;3. Department of Physics, Nanotechnology Research Lab, Kongunadu College of Arts and Science, Coimbatore, Tamil Nadu, India;4. Department of Physics, Government Arts College, Ooty, The Nilgiris, Tamil Nadu, India;5. Research Division, The Nilgiris Education and Research Foundation, The Nilgiris, Tamil Nadu, India;6. Department of Chemistry, INFO Institute of Engineering, Coimbatore, Tamil Nadu, India;1. University of Belgrade, Faculty of Physics, Studentski trg 12–16, Belgrade, 11000, Serbia;2. University of Belgrade, Vin?a Institute of Nuclear Sciences, P.O. Box 522, Belgrade, 11001, Serbia |
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| Abstract: | Thermo and photoluminescent properties of nanoparticles (NPs) of hafnium oxide (HfO2), both intrinsic and doped with terbium (Tb3+) are reported. The NPs of HfO2 were synthesized by hydrothermal route, using hafnium tetrachloride (HfCl4) and terbium chloride hexahydrated (TbCl3?6H2O) as precursors and sodium hydroxide (NaOH) to adjust the pH. Deionized water was used as solvent in all cases. The synthesis was carried out at different dopant concentrations from 0 to 20 at% of terbium with respect to the amount of hafnium in the precursor solution. The temperature of hydrothermal treatment was 200 °C and 80 min of reaction time. X-ray diffraction results show that at terbium concentrations higher than 15 at% the HfO2 nanoparticles have a crystalline structure corresponding to the tetragonal phase. Thermoluminescent (TL) characterization was performed after 5 min irradiation of the samples with ultraviolet light of 200 nm wavelength. The highest TL emission was observed on samples with 7 at% of Tb, with the TL peak centered at 128 °C. Thermoluminescence analysis shows behavior associated with second-order kinetics with activation energy of 0.49 eV. Photoluminescent spectrum present the characteristics 5D4→7FJ (J=3–6) terbium ion electronic transitions lines centered on 489 nm, 543 nm, 584 nm and 622 nm. |
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| Keywords: | Hydrothermal Thermoluminescence Photoluminescence |
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