The Isoelectric Point and the Surface Charge of Barium Titanate Nanoparticles/Graphene Oxide Determined Using the Electrophoretic Mobility Technique
Main Article Content
Abstract
Barium titanate nanopowders, and composite materials of barium titanate/ graphene oxide (10 wt.% of graphene oxide according to the initial composite composition) were synthesized by hydrothermal method at the fixed reaction condition of 200 oC and 24 hours. The obtained powders were characterized by different techniques: X-ray diffraction, FTIR spectroscopy, Particles size distribution, and Scanning electron microscopy. Zeta potential measurement under electrophoretic mobility technique was also employed to investigate the stability of the BaTiO3 nanoparticles and composite materials of barium titanate/graphene oxide. The results showed that the BaTiO3 present with the tetragonal crystal structure (P4mm, a = 4.0000 Å, c = 4.0109 Å) and has uniform morphology with the grain sizes are in the range of 70 - 140 nm. The BaTiO3 nanoparticles were well distribution and covered on a surface of graphene oxide. The BaTiO3 nanoparticles, and BaTiO3/graphene oxide are stable in alkali, neutral media, and acidic media up to pH ~ 5.
Keywords:
Graphene oxide, barium titanate, BaTiO3/GO, Zeta potential, electrophoretic mobility
References
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[7] M. Sohail, M.S. Khan, N. Saeed, M. Arif, M. Irfan, M. Omer, Synthesis, structural, thermal and dielectric properties of graphene oxide based barium titinate composite films: Possible materials for embedded capacitors, Materials Discovery 10 (2017) 29-36. https://doi.org/10.1016/j.md.2018. 04.001.
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[9] J.H. Yang, X. Xie, Z.Z. He, Y. Lu, X.D. Qi, Y. Wang, Graphene oxide-tailored dispersion of hybrid barium titanate@polypyrrole particles and the dielectric composites, Chem. Eng. J 355 (2019) 137-149. https://doi.org/10.1016/j.cej.2018.08.152
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[13] F. Baskoro, C.B. Wong, S.R. Kumar, C.W. Chang, C.H. Chen, D.W. Chen, S.J. Lue, Graphene oxide-cation interaction: Inter-layer spacing and zeta potential changes in response to various salt solutions, J. Membr. Sci 554 (2018) 253-263. https://doi.org/10.1016/j.memsci.2018. 03.006.
[14] T.H. Le, S.D. Dao, H. Nguyen Xuan, H.T. Nguyen, X.V. Nguyen, Synthesis of Fe3O4-reduced graphene oxide modified tissue-paper and application in the treatment of methylene blue, VNU Journal of Science: Natural Sciences and Technology 35 (2019) 56-63. https://doi.org/10. 25073/2588-1140/vnunst.4883.
[15] N.X. Hoan, C.N. Chau, Effect of the reaction temperature on the crystal structure and stability of the nano barium titanate prepared using hydrothermal synthesis, Vietnam Journal of Chemistry 51(6ABC) (2013) 558-562 (in Vietnamese).
[16] Inorganic Crystal Structure Database (ICSD) ©2020 FIZ Karlsruhe GmbH, https://icsd.pro
ducts.fiz-karlsruhe.de/. (accessed 10 August 2020)
[17] C.W. Chiang, J.H. Jean, Effects of barium dissolution on dispersing aqueous barium titanate suspensions, Mater. Chem. Phys 80 (2003) 647-655. https://doi.org/10.1016/S0254-0584(03)000 88-9.