BaTiO 3 @rGO nanocomposite: enhanced photocatalytic activity as well as improved electrode performance
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BaTiO3@rGO nanocomposite: enhanced photocatalytic activity as well as improved electrode performance M. A. Majeed Khan1,* , Sushil Kumar2, Maqusood Ahamed1, Jahangeer Ahmed3, Avshish Kumar4, and Muhammad Ali Shar1 1
King Abdullah Institute for Nanotechnology (KAIN), King Saud University, 11451 Riyadh, Saudi Arabia Department of Physics, Chaudhary Devi Lal University, 125055 Sirsa, India 3 Department of Chemistry, College of Science, King Saud University, 11451 Riyadh, Saudi Arabia 4 Amity Institute for Advanced Research and Studies (Materials & Devices), Amity University, 201313 Noida, India 2
Received: 29 April 2020
ABSTRACT
Accepted: 18 September 2020
Herein, we reported the preparation of BaTiO3 nanoparticles and BaTiO3@rGO nanocomposite by sol-gel route and microwave assisted co-precipitation method respectively. A series of analysis such as X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscopy, UV-visible absorption, photocatalytic activity, photoluminescence and Brunauer-Emmett-Teller (BET) method were employed to determine the properties of prepared samples. The dielectric properties of BaTiO3 nanoparticles and BaTiO3@rGO nanocomposite were studied at different frequencies and different temperatures. Photocatalytic performance of obtained BaTiO3@rGO nanocomposite was evaluated via photocatalytic degradation process of methylene blue (MB) as a model dye under irradiation of visible light. The cumulative outcome of results indicated the superior performance of BaTiO3@rGO nanocomposite as photocatalyst when compared with pure BaTiO3 nanoparticles, which might be attributed to distensible surface area and effective separation of photo-excited electron-hole pairs. Our findings demonstrate that the prepared nanocomposite as reported here may be utilized as photocatalyst for degrading organic pollutants and as electrode in charge storage devices.
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Springer Science+Business
Media, LLC, part of Springer Nature 2020
1 Introduction BaTiO3 is recognized as one of the most well-known and potential ferroelectric materials which are employed nowadays in a large number of technological applications [1]. It has unique piezoelectric and ferroelectric properties at room temperature
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https://doi.org/10.1007/s10854-020-04514-0
which are desirable for sophisticated device fabrication. BaTiO3 shows various crystallographic phases, among them cubic and tetragonal phases are favorable and widely emphasized for diverse applications. Nowadays, mono-dispersed BaTiO3 nanoparticles exhibit keen scientific interest compared to bulk BaTiO3 [2], because of its modified properties, e.g.,
J Mater Sci: Mater Electron
high quality bio-imaging [3], enhanced photocatalytic and charge storage capacity, potential for device miniaturization and so on. Moreover, the dielectric properties and crystal structure of BaTiO3 are greatly changed at nano-scale [4]. BaTiO3-based nanostructures have found their applications as oxide photocatalysts for th
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