Improving the photocatalytic properties of metal tungsten oxide heterostructure prepared by the green hydrothermal method

IF 2.8 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Polyhedron Pub Date : 2026-02-01 Epub Date: 2025-11-17 DOI:10.1016/j.poly.2025.117894

Muhammad Tariq Nadeem , M.I. Khan , Ali Mujtaba , Merfat S. Al-Sharif , Dalia I. Saleh , M.N. Khan

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Abstract

The significance of this study lies in addressing the urgent need for sustainable solutions to mitigate dye-contaminated wastewater. This work presents a novel green-synthesized CuWO₄@SnWO₄ nanocomposite using Aloe vera extract via hydrothermal method for enhanced photocatalytic degradation of methylene blue (MB) under visible light. Structural analysis via XRD confirmed the formation of a monoclinic CuWO₄@SnWO₄ phase with an average crystallite size of 29.11 nm, indicating high crystallinity and defect-induced strain. FTIR spectra verified the presence of characteristic WO, CuO, and SnO vibrational bands, validating the composite's structural integrity. SEM revealed interconnected, irregular flake-like morphologies with particle sizes centered around 47 μm, promoting higher surface area and charge transfer. Electrochemical characterizations using CV and EIS demonstrated strong redox activity and low charge transfer resistance (1.09 Ω), confirming efficient charge separation and mobility. UV–vis spectroscopy showed strong absorption in the visible range with a narrow band gap of 2.23 eV. Photocatalytic experiments exhibited remarkable degradation efficiency of 91 % for MB within 135 min, following zero-order kinetics. This highlights the composite's applicability for wastewater treatment. Future studies can further optimize morphology and explore other green precursors to expand practical deployment in environmental remediation.

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改善绿色水热法制备的金属氧化钨异质结构的光催化性能

本研究的意义在于解决可持续解决方案的迫切需要，以减轻染料污染的废水。本文以芦荟提取物为原料，通过水热法合成了一种新型的CuWO₄@SnWO₄纳米复合材料，以增强可见光下亚甲基蓝（MB）的光催化降解。XRD结构分析证实形成了单斜CuWO₄@SnWO₄相，平均晶粒尺寸为29.11 nm，显示了高结晶度和缺陷诱导应变。FTIR光谱验证了WO、CuO和SnO振动带的存在，验证了复合材料的结构完整性。扫描电镜显示出相互连接的不规则片状形貌，颗粒尺寸在47 μm左右，促进了更高的表面积和电荷转移。利用CV和EIS进行的电化学表征显示出较强的氧化还原活性和较低的电荷转移电阻（1.09 Ω），证实了有效的电荷分离和迁移。紫外可见光谱显示其在可见光范围内具有较强的吸收，带隙较窄，为2.23 eV。光催化实验显示，在135分钟内，MB的降解效率为91%，符合零级动力学。这突出了该复合材料在废水处理方面的适用性。未来的研究可以进一步优化形态，探索其他绿色前体，扩大在环境修复中的实际应用。

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来源期刊

Polyhedron 化学-晶体学

CiteScore

4.90

自引率

7.70%

发文量

515

审稿时长

2 months

期刊介绍： Polyhedron publishes original, fundamental, experimental and theoretical work of the highest quality in all the major areas of inorganic chemistry. This includes synthetic chemistry, coordination chemistry, organometallic chemistry, bioinorganic chemistry, and solid-state and materials chemistry. Papers should be significant pieces of work, and all new compounds must be appropriately characterized. The inclusion of single-crystal X-ray structural data is strongly encouraged, but papers reporting only the X-ray structure determination of a single compound will usually not be considered. Papers on solid-state or materials chemistry will be expected to have a significant molecular chemistry component (such as the synthesis and characterization of the molecular precursors and/or a systematic study of the use of different precursors or reaction conditions) or demonstrate a cutting-edge application (for example inorganic materials for energy applications). Papers dealing only with stability constants are not considered.