Synthesis, Crystal Structure and Spectral Characterization of a New Caesium–Sodium-Isopolyvanadate: Photodegradation of Methylene Blue Dye

IF 0.4 4区化学 Q4 CRYSTALLOGRAPHY Journal of Chemical Crystallography Pub Date : 2024-03-04 DOI:10.1007/s10870-024-01005-6

Tahmineh Kohanfekr, Mohammad Hakimi, Hasan Ali Hosseini, Michal Dusek, Monika Kucerakova

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Abstract

A new aqua-tricaesium-sodium polymetavanadate compound, [Cs₃Na(VO₃)₄(H₂O)] (1), was synthesized by reacting caesium chloride and sodium metavanadate at ambient pH. The structure was characterized and identified using single-crystal X-ray diffraction, Fourier-transform infrared spectroscopy, Raman spectroscopy, and energy dispersive X-ray analysis (EDS). Compound (1) crystallizes in an orthorhombic system with a Pnma space group, and cell parameters a = 11.6554(4), b = 8.3408(2), c = 16.1121(5). Vanadium has tetrahedral coordination connected to the next vanadium atom through an oxygen bridge. The infinite zigzag metavanadate chains formed by corner-sharing VO₄ tetrahedral constitute a1D building block. The chains were laterally connected through Cs, Na, and H₂O. This connectivity generates continuous 2D layers within the ab plane. The photocatalytic performance of (1) was evaluated by measuring the degradation of methylene blue under visible light. The results confirmed the efficiency of the photocatalytic activity because of the narrowed bandgap energy of 2.18 eV, and 85% degradation rate, making it suitable for absorbing visible light.

Graphical Abstract

The paper reports the synthesise and characterization of a new isopolyvanadate compound, [Cs₃Na(VO₃)₄H₂O], which contains vanadim in the five oxidation state with tetrahedral coordination. It forms metavanadate chains interconnected by caesium and sodium cations. The photocatalytic activity was tested by degrading methylen blue under visible light irradiation. The results showed decent activity attributed to the narrowed bandgap energy of 2.18 eV.

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新型异多钒酸铯钠的合成、晶体结构和光谱特性：亚甲基蓝染料的光降解

氯化铯和偏钒酸钠在环境 pH 值下反应合成了一种新的水生三铯-多偏钒酸钠化合物 [Cs3Na(VO3)4(H2O)] (1)。利用单晶 X 射线衍射、傅立叶变换红外光谱、拉曼光谱和能量色散 X 射线分析（EDS）对其结构进行了表征和鉴定。化合物(1)呈正交菱形结晶，空间群为 Pnma，晶胞参数 a = 11.6554(4)，b = 8.3408(2)，c = 16.1121(5)。钒具有四面体配位，通过氧桥与下一个钒原子相连。由角共享的 VO4 四面体形成的无限人字形偏钒酸链构成了一维构件。这些链通过 Cs、Na 和 H2O 横向连接。这种连接在 ab 平面内产生了连续的二维层。通过测量亚甲基蓝在可见光下的降解情况，对 (1) 的光催化性能进行了评估。结果表明，(1)的带隙能为 2.18 eV，降解率为 85%，适合吸收可见光，因而具有高效的光催化活性。它形成了由铯和钠离子相互连接的偏钒酸盐链。通过在可见光照射下降解亚甲基蓝，对光催化活性进行了测试。结果表明，由于其带隙能缩小到 2.18 eV，因此具有良好的活性。

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来源期刊

Journal of Chemical Crystallography 化学-光谱学

CiteScore

1.50

自引率

12.50%

发文量

审稿时长

6.3 months

期刊介绍： Journal of Chemical Crystallography is an international and interdisciplinary publication dedicated to the rapid dissemination of research results in the general areas of crystallography and spectroscopy. Timely research reports detail topics in crystal chemistry and physics and their relation to problems of molecular structure; structural studies of solids, liquids, gases, and solutions involving spectroscopic, spectrometric, X-ray, and electron and neutron diffraction; and theoretical studies.