ISOVALENT SUBSTITUTION OF LANTHANUM ATOMS IN BaLa2Sc2O7 SCANDATE

DOI: https://doi.org/10.17721/1728-2209.2023.1(58).4

Authors

Keywords:

compounds of An+1BnO3n+1 type, slab perovskite-like structure, isomorphism, solid solution, X-ray powder diffraction.

Abstract

Background. Exploring the effect of isomorphic substitution of atoms on structure and features of oxide compounds is one of the main tasks of modern materials science. Of particular interest are representatives of compounds An+1BnO3n+1 family (in particular, AIILn2Sc2O7 scandates) with slab perovskite-like snrucnure, which possess a number of practically important properties..This work is devoted to study the possibility of La atoms by smaller Dy atoms substitution in two-slab perovskite-like structure of BaLa2Sc2O7 and its effect on the crystallographic features of the BaLa2-xDyxSc2O7 scandates synthesized.

Methods. The method of synthesis of new phases by heat treatment of co-crystallized salts, powder X-ray diffraction methods and the method of second optical harmonic generation by the obtained phases are used in the work.

Results. The boundaries of isovalent substitution of La atoms (0 £ х £ 1,0) and the crystallographic parameters of the synthesized BaLa2-xDyxSc2O7 phases with a two-slab structure are determined. The indexing of the X-ray powder diffraction pattern of the BaLa2-xDyxSc2O7 (0 £ х £ 1,0) has revealed the tetragonal symmetry of the heat treated samples. The observed systematic extinctions and test results for the generation of a signal of the second optical harmonic of laser radiation indicate that their crystal structure belongs to centrosymmetrical P42/mnm space group. The character of the phase relations in the BaLa2-xDyxSc2O7 system and the type of concentration dependences the parameters of the tetragonal unit cells of BaLa2-xDyxSc2O7 phases with a two-slab structure indicate that by their nature these phases are limited row of solid solutions. The most probable mechanism of destruction of slab perovskite-like structure in samples BaLa2-xDyxSc2O7 with x > 1 was determined and a comparative comparison the stability of the slab structure of scandates AIILa2-xDyxSc2O7 (AII = Ba, Sr) was performed.

Сonclusions. The obtained results indicate the possibility of a sufficiently significant isomorphic substitution of REE atoms in slab perovskite-like structure of BaLn2Sc2O7 scandates, can be further used to regulate their properties and are of undoubted interest for solving the problem of a targeted search new compounds of the type MeLnnBIIInO3n+1 with this type of structure.

References

Dashevskyi, M., Boshko, O., Nakonechna, O. & Belyavina, N. (2017). Phase Transformations in Equiatomic Y–Cu Powder Mixture at Mechanical Milling. Metallofiz. Noveishie Tekhnol., 39(4), 541–552. https://doi.org/10.15407/mfint.39.04.054

Ding, P., Li, W., Zhao, H., Wu, C., Zhao, L., Dong, B. & Wang, S. (2021). Review on Ruddlesden-Popper perovskites as cathode for solid oxide fuel cells. J. of Physics: Materials, 4(2), 022002. https://iopscience.iop.org/article/10.1088/2515-7639/abe392/pdf

Gilev, A. R., Kiselev, E. A. & Cherepanov, V. A. (2018). Oxygen transport phenomena in (La,Sr)2(Ni,Fe)O4 materials. J. Mater. Chem. A, 6, 5304–12. https://doi.org/10.1039/C7TA07162K

Han, N., Guo, X., Cheng, J., Liu, P., Zhang, S., Huang, S., Rowles, M. R., Fransaer, J., & Liu, S. (2021). Inhibiting in situ phase transition in Ruddlesden-Popper perovskite via tailoring bond hybridization and its application in oxygen permeation. Matter, 4(5), 1720–1734. https://doi.org/10.1016/j.matt.2021.02.01

Huan, Y., Chen, S., Zeng, R., Wei, T., Dong, D., Hu, X. & Huang, Y. (2019). Intrinsic effects of Ruddlesden-Popper-based bifunctional catalysts for high-temperature oxygen reduction and evolution. Adv. Energy Mater., 9(29), 1901573. https://doi.org/10.1002/aenm.201901573

Kamimura, S., Yamada, H. & Xu, C-N. (2012). Strong reddish-orange light emission from stress-activated Srn+1SnnO3n+1:Sm3+ (n = 1, 2, ∞) with perovskite-related structures. Appl. Phys. Lett., 101(9), 091113. https://doi.org/10.1063/1.4749807

Kim, I. S., Nakamura, T. & Itoh, M. J. (1993). Humidity Sensing Effects of the Layered Oxides SrO (LaScO3)n (n = 1, 2, ∞). Ceram. Soc. Jap., 101(7), 800–803. https://doi.org/10.2109/jcersj.101.800

Kurtz, S. K. & Perry, T. T. (1968). A Powder Technique for the Evaluation of Nonlinear Optical Materials. J. Appl. Phys., 39(8), 3798–3713. https://doi.org/10.1063/1.1656857

Nirala, G., Yadav, D. & Upadhyay, S. (2020). Ruddlesden-Popper phase A2BO4 oxides: Recent studes on structure, electrical, dielectric and optical properties. J. Advanced Ceramics, 9(2),129–148. https://doi.org/10.1007/s40145-020-0365-x

Schaak, R. E. & Mallouk, T. E. (2002). Perovskites by Design: A Toolbox of Solid-State Reactions Chem. Mater., 5(4), 1455–1471. https://doi.org/10.1021/cm010689m

Shimizu, K., Itoh, S., Hatamachi, T., Kodama, T., Sato, M., & Toda, K. (2005). Photocatalytic water splitting on Ni-intercalated Ruddlesden-Popper tantalate H2La2/3Ta2O7. Chem. Mater., 17(20), 5161–5166. https://doi.org/10.1021/cm050982c

Titov, Y. A., Belyavina, N. M., Slobodyanik, M. S., Chumak, V. V. & Nakonechna O. I. (2019). Synthesis and crystal structure of isovalently substituted slab SrLa2-xDyxSc2O7 scandates. Voprosy khimii i khimicheskoi tekhnologii, 6, 228–235 [in Ukrainian]. https://doi.org/10.32434/0321-4095-2019-127-6-228-235

Titov, Y. O., Belyavina, N. M., Markiv, V. Ya., Slobodyamik, M. S., Krayevska, Ya. A., Yaschuk, V. P. & Chumak, V. V. (2009). Synthesis and crystal structure of BaLn2Sc2O7. Dopov. Nac. acad. nauk Ukr., 5, 172–178 [in Ukrainian].

Titov, Y. O., Belyavina, N. M., Slobodyanik, M. S., Nakonechna, O. I. & Strutynska, N. Y. (2021). Effect of strontium atoms substitution on the features of two-slab structure of Sr1-xCaxLa2Sc2O7 scandates. French-Ukrainian J. Chem., 9(1), 44–50. https://doi.org/10.17721/fujcV9I1P44-50

Wang, Z., Huang, H., Gang Li, G., Yan, X., Yu, Z., Wang, K. & Wu, Y. (2021). Advances in engineering perovskite oxides for photochemical and photoelectrochemical water splitting. Applied Physics Reviews, 8(2), 021320. https://doi.org/10.1063/5.0039197

Xiao, H., Liu, P., Wang, W., Ran, R., Zhou, W. & Shao, Z. (2020). Ruddlesden-Popper Perovskite Oxides for Photocatalysis-Based Water Splitting and Wastewater Treatment. Energy & Fuels, 34(8), 9208–9221. https://doi.org/10.1021/acs.energyfuels.0c02301

Xu, N., Takei, T., Miura, A. & Kumada, N. (2014). Photocatalytic Activities of Layered Niobate Perovskite (A'An−1NbnO3n+1, A: Ca, La) with Substitution of Ti and W for Nb. J. Ion Exchange, 25(4), 242–247. https://doi.org/10.5182/jaie.25.242

Xu, X., Pan, Y., Zhong, Y., Ran, R. & Shao, Z. (2020). Ruddlesden-Popper perovskites in electrocatalysis. Mater. Horiz., 7(10), 2519–2565. https://doi.org/10.1039/D0MH00477D

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Published

2023-12-02

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Vol. 58 No. 1 (2023): Bulletin Taras Shevchenko National University of Kyiv. Chemistry

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Copyright (c) 2023 Мар'яна ТИМОШЕНКО, Юрій ТІТОВ, Надія БІЛЯВИНА, Микола СЛОБОДЯНИК

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ISOVALENT SUBSTITUTION OF LANTHANUM ATOMS IN BaLa2Sc2O7 SCANDATE: DOI: https://doi.org/10.17721/1728-2209.2023.1(58).4. (2023). Bulletin of the Taras Shevchenko National University of Kyiv. Chemistry, 58(1), 22-25. https://chemistry.bulletin.knu.ua/article/view/2919

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