J Nanostruct 11(1): 136-142, Winter 2021 RESEARCH PAPER Synthesis and Structural Properties of Eu 3+ :TiO 2 Nanoparticles Basma Abbas Jabar 1 , Hanaa M. Yaseen 2,* , Mohamad A. Hamzah 3 , Khawla J. Tahir 1 , Noor J. Ridha 1 , Firas K. Mohamad Alosfur 4,5 , Rajaa A. Madlol 1 ,Basheer M. Hussein 1 Department of Physics, college of science, University of Kerbala, Iraq 2 Department of Physics, College of Science for Women, University of Baghdad, Iraq 3 Department of Physics, college of science, University of Baghdad, Iraq 4 Department of Environmental Health, College of Applied Medical Sciences, University of Kerbala, Kerbala, Iraq 5 Faculty of Dentistry, University of Alkafeel, Najaf, Iraq * Corresponding Author Email: Khawla.taher@uokerbala.edu.iq Khawla.taher@uokerbala.edu.iq ARTICLE INFO Article History: Received 12 August 2020 Accepted 08 November 2020 Published 01 January 2021 Keywords: Eu 3+ FESEM Nanoparticles Sol-gel TiO 2 ABSTRACT How to cite this article Jabar B.A., Yaseen H.M., Hamzah M.A., Tahir Kh.J., Ridha N.J., Mohamad Alosfur F.K., Madlol R.A., Hussein B.M. Synthesis and Structural Properties of Eu 3+ :TiO 2 Nanoparticles. J Nanostruct, 2021; 11(1): 136-142. DOI: 10.22052/JNS.2021.01.015 Pure and doped TiO 2 with Eu 3+ nanoparticles were prepared by a novel and simple preparation method due to their wide spectrum of applications such as solar cells, gas sensors photocatalyst, etcetera. e pure TiO 2 nanoparticles and the doping TiO 2 with the Eu 3+ ions prepared at room temperature by the sol-gel method via the reaction of Titanium (IV) isopropoxide (TTIP) with an aqueous solution of hydrochloric acidic in the presence of ethanol. e crystal structure of the prepared nanoparticles was investigated by X-Ray Diffraction (XRD) while the morphology of the samples was investigated by Field Emission Scanning Electron Microscopy (FESEM). All the prepared samples having excellent crystalline. As well, XRD proved that doping TiO 2 with Eu 3+ reduced the crystallite size. e FESEM images showed that the doping of TiO 2 with Eu 3+ results in larger particle sizes. In the present work, the effects of doping, particle size, and stabilization of the anatase phase were studied. As well as the deceleration of crystal growth by the rare-earth-doped into TiO 2 host was investigated. INTRODUCTION Recently, several types of published research have been emphasized the preparaon and usage of Titanium dioxide (TiO 2 ) nanoparcles in many applicaons such as hydrogen (H 2 ) generaon, solar cells, photocatalyst, and gas sensors [1]. This is due to its low cost, high stability against photo-induced corrosion and chemicals [2]. It is non-toxic, has strong oxidizing power, a wide energy bandgap of 3.2 eV and maximum light scaering with virtually no absorpon [3, 4]. The three different crystalline forms of TiO 2 are rule (tetragonal), anatase (tetragonal), and brookite (orthorhombic) [5]. The formaon of each crystalline phase depends on the nature of starng material, sol composion, deposion method and calcinaon temperatures [6, 7]. TiO 2 bulk can be transformed from an amorphous phase into crystalline by calcinaon [8]. Several methods have been employed to synthesis TiO 2 , such as microwave [9-11], hydrothermal [12] polyol mediate solvothermal [13] and ultrasonic methods [14]. Among these methods, the sol-gel is widely used due to its simplicity, low cost, high flexibility, high yield and homogeneous product [15]. Sol-gel procedures consist of four steps: the main processes are hydrolysis condensaon, growth and gel formaon. In the inial steps, is work is licensed under the Creative Commons Attribution 4.0 International License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.