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用于协同光降解靛蓝胭脂红染料的BiO/BiWO纳米复合材料的水热合成及结构优化

Hydrothermal synthesis and structural optimization of BiO/BiWO nanocomposites for synergistic photodegradation of Indigo Carmine dye.

作者信息

Sayed Mostafa A, El-Gamal S M A, Ramadan M, Helmy Fatma M, Mohsen Alaa

机构信息

Chemistry Department, Faculty of Science, Ain Shams University, Cairo 11566, Egypt.

Faculty of Engineering, Ain Shams University, Cairo, Egypt.

出版信息

Sci Rep. 2025 May 18;15(1):17260. doi: 10.1038/s41598-025-01925-z.

DOI:10.1038/s41598-025-01925-z
PMID:40383748
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12086239/
Abstract

Future research directions aim to optimize the efficiency and sustainability of bismuth-based semiconductors for environmental remediation. In this study, potent BiO/BiWO composites were synthesized via a facile in situ hydrothermal-assisted impregnation of Bi onto WO nano-substrate. Comprehensive characterization using HR-TEM, SEM-EDX, PXRD, XPS, FTIR, PL, and DRS confirmed the structural, morphological, and optical properties of the synthesized materials. The optimized BiO/BiWO heterojunction exhibited significantly enhanced photocatalytic activity under visible-light (λ > 350 nm) compared to pristine BiO and WO, effectively degrading Indigo Carmine (IC) dye. The UV-Vis spectroscopy and chemical oxygen demand (COD) analyses validated the degradation efficiency. A detailed photocatalytic mechanism was proposed based on trapping experiments, band position calculations, and photoluminescence measurements. Furthermore, the fabricated nanocomposites demonstrated excellent stability and recyclability, highlighting their potential for environmental remediation. This study provides a promising strategy for designing efficient visible-light-driven photocatalysts for wastewater treatment.

摘要

未来的研究方向旨在优化铋基半导体用于环境修复的效率和可持续性。在本研究中，通过一种简便的原位水热辅助浸渍法将铋负载到WO纳米基底上，合成了高效的BiO/BiWO复合材料。利用高分辨透射电子显微镜（HR-TEM）、扫描电子显微镜-能谱仪（SEM-EDX）、粉末X射线衍射仪（PXRD）、X射线光电子能谱仪（XPS）、傅里叶变换红外光谱仪（FTIR）、光致发光光谱仪（PL）和漫反射光谱仪（DRS）进行的综合表征证实了合成材料的结构、形态和光学性质。与原始的BiO和WO相比，优化后的BiO/BiWO异质结在可见光（λ > 350 nm）下表现出显著增强的光催化活性，能有效降解靛蓝胭脂红（IC）染料。紫外-可见光谱和化学需氧量（COD）分析验证了降解效率。基于捕获实验、能带位置计算和光致发光测量，提出了详细的光催化机理。此外，制备的纳米复合材料表现出优异的稳定性和可回收性，突出了它们在环境修复方面的潜力。本研究为设计用于废水处理的高效可见光驱动光催化剂提供了一种有前景的策略。

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