Abed Sattar H, Reshak Ali H
College of Education for Pure Sciences, University of Al-Muthanna, Al-Muthanna, Iraq.
Physics Department, College of Science, University of Basrah, Basrah, 61004, Iraq.
J Fluoresc. 2025 Jun;35(6):4335-4345. doi: 10.1007/s10895-024-03841-3. Epub 2024 Jul 13.
This research explores the synthesis, characterization, and application of Vanadium Pentoxide nanoparticles (VO NPs), focusing on their efficacy in the photocatalytic degradation of organic dyes under visible light. Utilizing a co-precipitation method, we synthesized VO NPs characterized by an orthorhombic crystal structure with a consistent average particle size of 28 nm. The optical properties of VO NPs, including their band gap, were thoroughly investigated to understand their light absorption capabilities, which are crucial for photocatalytic activity. In our study, Methyl Violet (MV) dye was employed as a model organic pollutant to assess the photocatalytic performance of the nanoparticles. Under visible light irradiation, the VO nanoparticles demonstrated an exceptional photocatalytic degradation efficiency, achieving up to 85% degradation of the MV dye within 100 min. This high level of efficiency is attributed to the nanoparticles' ability to effectively absorb visible light and generate electron-hole pairs, thereby facilitating a robust degradation process. Further analysis revealed that the photocatalytic activity led to the generation of reactive oxygen species (ROS) such as superoxide and hydroxyl radicals, which are integral to the dye degradation mechanism. These ROS play a critical role in breaking down the dye molecules, significantly contributing to the overall effectiveness of the photocatalytic process. The results of this study highlight the potential of VO nanoparticles as a sustainable and effective photocatalytic material for environmental remediation applications, particularly in the treatment of wastewater containing organic dyes. This research not only advances our understanding of the photocatalytic properties of VO nanoparticles but also demonstrates their practical application in addressing environmental pollution through innovative and efficient degradation of hazardous substances.
本研究探索了五氧化二钒纳米颗粒（VO NPs）的合成、表征及应用，重点关注其在可见光下对有机染料的光催化降解效果。利用共沉淀法，我们合成了具有正交晶体结构、平均粒径一致为28纳米的VO NPs。对VO NPs的光学性质，包括其带隙进行了深入研究，以了解其光吸收能力，这对光催化活性至关重要。在我们的研究中，采用甲基紫（MV）染料作为模型有机污染物来评估纳米颗粒的光催化性能。在可见光照射下，VO纳米颗粒展现出卓越的光催化降解效率，在100分钟内实现了高达85%的MV染料降解率。这种高水平的效率归因于纳米颗粒有效吸收可见光并产生电子 - 空穴对的能力，从而促进了强大的降解过程。进一步分析表明，光催化活性导致了超氧化物和羟基自由基等活性氧物种（ROS）的产生，这些是染料降解机制不可或缺的部分。这些ROS在分解染料分子中起关键作用，对光催化过程的整体有效性有显著贡献。本研究结果突出了VO纳米颗粒作为一种可持续且有效的光催化材料在环境修复应用中的潜力，特别是在处理含有有机染料的废水方面。这项研究不仅增进了我们对VO纳米颗粒光催化性质的理解，还展示了它们通过创新且高效地降解有害物质来解决环境污染问题的实际应用。
