Graphene influence on the structure, magnetic, and optical properties of rare-earth perovskite
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RESEARCH PAPER
Graphene influence on the structure, magnetic, and optical properties of rare-earth perovskite Seham K. Abdel-Aal
&
Ahmed S. Abdel-Rahman
Received: 18 June 2020 / Accepted: 26 August 2020 # Springer Nature B.V. 2020
Abstract Perovskite-graphene nanocomposites of rare-earth LaFeO3-rGO and LaFeO3 nanoparticles are synthesized and characterized. The preparation was done by citrate sol-gel method. The structural characterization has been performed using XRD and FT-IR. Scanning electron microscope (SEM) and atomic force microscope (AFM) were used to analyze the morphology of the prepared nanocomposite. Vibrating sample magnetometer (VSM) was used to study the magnetic properties of the investigated samples. Introducing graphene to the structure results increase in MS. Also, the optical and thermal properties have been measured and discussed, and the effect of graphene is observed where it decreases the band gap than reported for pure LaFeO3 nanoparticles.
Keywords Graphene-perovskite nanocomposite . Magnetic properties . Thermal properties . Energy band gap
This article is part of the topical collection: Nanotechnology in Arab Countries, Guest Editor: Sherif El-Eskandarany S. K. Abdel-Aal (*) : A. S. Abdel-Rahman (*) Physics department, Faculty of Science, Cairo University, Giza 12613, Egypt e-mail: [email protected] e-mail: [email protected]
Introduction Perovskite materials have drowned interest nowadays due to its multifunctional applications. Otherwise, it is hybrid perovskite (Abdel-Aal et al. 2019; Abdel-Aal and Abdel-Rahman 2019; Mostafa et al. 2018; AbdelAal et al. 2017a, b; Abdel-Aal and Abdel-Rahman 2017; Mostafa et al. 2017a, b; Abdel-Aal 2017; Mondal et al. 2017; Mostafa et al. 2014) or oxide perovskite with the general formula ABO3, where A and B are metal ions with different sizes and valances. The rare-earth perovskite of LaFeO3 is one of the most perovskite widely used for multifunctional applications such as catalysis, magnetic materials, sensors, electrode materials in fuel cells, and optoelectronic devices (Phokha et al. 2014; Afifah and Saleh 2016; Tang et al. 2013; Peng et al. 2015; Abazari et al. 2014; Li et al. 2010; Yang et al. 2007; Thirumalairajan et al. 2012; Sathishkumar et al. 2016; De Vidales et al. 2014; Jyothi et al. 2014; Milanova et al. 2014; Lee et al. 2014; Treves 1965; Kaiwen et al. 2013; Cristóbal et al. 2016; Wei et al. 2009). Many methods have been reported for synthesizing LaFeO3 such as sol-gel, co-precipitation, bull milling, sonochemical, and hydrothermal (Phokha et al. 2014; Tang et al. 2013; Abazari et al. 2014; Wei et al. 2009). Graphene is a 2D carbon sheet with one atom carbon atom thickness. It is one of the thinnest materials in the world. Recently the preparation and characterization of graphene and graphene nanocomposites attract the attention of scientists. These nanocomposites can process
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new properties that exhibit multiple functionalities (Abdel-Aal et al. 2018; Abdel-Aal and Mohamed 2019; Jogender et al. 2020; Mand
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