Structural and Photoluminescence Properties of Ca2+-Substituted Self-Activated Photoluminescence Material of Na2TiSiO5

IF 0.5 Q4 MULTIDISCIPLINARY SCIENCES

Journal of Mathematical and Fundamental Sciences Pub Date : 2024-05-21 DOI:10.5614/j.math.fund.sci.2023.55.2.6

Dzaky Dian Ruhimat, F. Failamani, Bambang Prijamboedi

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Abstract

The effects of Ca2+ substitution on the structural and optical properties of Na2TiSiO5 were studied. It was expected that the Ca2+ ions would replace Na+ ions and change the coordination of Ti4+-O2- as a luminescence center. Na2(1‑x)CaxTiSiO5 (x = 0.00, 0.50, 1.00) samples were synthesized using the solid-state method, and their structural properties, the local Ti4+-O2- coordination, the absorption spectra, and the photoluminescence properties were studied. The electronic structure of Na2(1-x)CaxTiSiO5 with x = 0.00 and 1.00 was also calculated using the Full Potential Linear Augmented Plane Wave (FP-LAPW) method to explain some of the observed properties. The Ca2+ substitution resulted in a phase transformation from an orthorhombic to a monoclinic structure. The number of TiO6 octahedra increased with the increase of Ca2+ and correlated with the decrease of PL emission intensity of the Na2(1‑x)CaxTiSiO5 samples. The Ti-3d bands in the CaTiSiO5 were more dispersive than in the Na2TiSiO5 and were responsible for the PL emission intensity reduction.

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Ca2+ 取代的 Na2TiSiO5 自激活光致发光材料的结构和光致发光特性

研究了 Ca2+ 取代对 Na2TiSiO5 结构和光学性质的影响。预计 Ca2+ 离子将取代 Na+ 离子并改变作为发光中心的 Ti4+-O2- 的配位。采用固态法合成了 Na2(1-x)CaxTiSiO5 (x = 0.00, 0.50, 1.00) 样品，并研究了它们的结构特性、局部 Ti4+-O2- 配位、吸收光谱和光致发光特性。此外，还使用全电位线性增强平面波（FP-LAPW）方法计算了 x = 0.00 和 1.00 的 Na2(1-x)CaxTiSiO5 的电子结构，以解释观察到的一些性质。Ca2+ 取代导致了从正方晶结构到单斜晶结构的相变。TiO6 八面体的数量随着 Ca2+ 的增加而增加，并与 Na2(1-x)CaxTiSiO5 样品的聚光发射强度的降低相关。与 Na2TiSiO5 相比，CaTiSiO5 中的 Ti-3d 带更加分散，这也是导致 PL 发射强度降低的原因。

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来源期刊

Journal of Mathematical and Fundamental Sciences MULTIDISCIPLINARY SCIENCES-

CiteScore

1.30

自引率

0.00%

发文量

审稿时长

24 weeks

期刊介绍： Journal of Mathematical and Fundamental Sciences welcomes full research articles in the area of Mathematics and Natural Sciences from the following subject areas: Astronomy, Chemistry, Earth Sciences (Geodesy, Geology, Geophysics, Oceanography, Meteorology), Life Sciences (Agriculture, Biochemistry, Biology, Health Sciences, Medical Sciences, Pharmacy), Mathematics, Physics, and Statistics. New submissions of mathematics articles starting in January 2020 are required to focus on applied mathematics with real relevance to the field of natural sciences. Authors are invited to submit articles that have not been published previously and are not under consideration elsewhere.