Controlled nanorod-like structure of iron tetrapolyvanadate for enhanced heterogeneous Fenton-like catalysis

IF 2.1 4区材料科学 Q3 CHEMISTRY, MULTIDISCIPLINARY Journal of Nanoparticle Research Pub Date : 2024-11-21 DOI:10.1007/s11051-024-06175-0

Bui Ba Canh, Nguyen Duc Manh, Cao Hong Ha, Nguyen Vân-Anh

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Abstract

In this study, a heterogeneous Fenton-like system was developed based on Fe₂V₄O₁₃ composite oxide material with the aim of decomposing some hazardous organic compounds present in industrial wastewater (e.g., methylene blue, ciprofloxacin). The research results have shown that this composite oxide material was synthesized via a simple hydrothermal method with controlled conditions optimized for hydrothermal temperature and structure aging temperature. Characterization methods indicated that the optimal hydrothermal condition was at 180 °C for 12 h, and the structure aging temperature was at 80 °C for 12 h. Under these synthesis and structure aging conditions, a characteristic nano-rod structure of the material with dimensions of 500 × 40 × 20 nm (in length × width × height) was formed. This structure exhibited the best catalytic activity for organic compound decomposition compared to other material structures synthesized under different conditions in this study. The catalytic activity in decomposing of methylene blue and ciprofloxacin was high, reaching > 99% and > 77%, respectively, after 14 min. This was achieved following the Fenton system mechanism in the presence of H₂O₂ at pH 7 and 9. The mechanism followed the mixed homogeneous and heterogeneous Fenton process, in which the presence of leached vanadium ions accelerated the ≡Fe²⁺/≡Fe³⁺ redox couple regeneration, consequently enhancing the degradation efficiency. In the mechanism, the formation of the highly active free radicals •OH and •OOH is observed and demonstrated by using specific competitive inhibitors (quinhydrone, ascorbic acid). These findings suggest the potential of the Fe₂V₄O₁₃-based nanomaterial for the efficient treatment of organic compounds in wastewater, particularly under neutral to alkaline media.

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用于增强异相芬顿催化的四聚钒酸铁受控纳米棒状结构

本研究以 Fe2V4O13 复合氧化物材料为基础，开发了一种类似芬顿的异相系统，旨在分解工业废水中的一些有害有机化合物（如亚甲蓝、环丙沙星）。研究结果表明，这种复合氧化物材料是通过简单的水热法合成的，并对水热温度和结构老化温度进行了优化控制。表征方法表明，最佳水热条件为 180 °C 12 小时，结构老化温度为 80 °C 12 小时。在这些合成和结构老化条件下，该材料形成了特征性的纳米棒状结构，尺寸为 500 × 40 × 20 nm（长 × 宽 × 高）。与本研究在不同条件下合成的其他材料结构相比，这种结构对有机化合物分解的催化活性最好。14 分钟后，亚甲基蓝和环丙沙星的分解催化活性很高，分别达到 > 99% 和 > 77%。这是在 pH 值为 7 和 9 的条件下，在 H2O2 的存在下按照 Fenton 系统机理实现的。该机制遵循均相和异相混合芬顿过程，其中浸出钒离子的存在加速了≡Fe2+/≡Fe3+氧化还原偶的再生，从而提高了降解效率。在这一机制中，观察到了高活性自由基 -OH 和 -OOH 的形成，并通过使用特定的竞争性抑制剂（醌、抗坏血酸）得到了证明。这些发现表明，基于 Fe2V4O13 的纳米材料具有高效处理废水中有机化合物的潜力，尤其是在中性至碱性介质中。

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来源期刊

Journal of Nanoparticle Research 工程技术-材料科学：综合

CiteScore

4.40

自引率

4.00%

发文量

198

审稿时长

3.9 months

期刊介绍： The objective of the Journal of Nanoparticle Research is to disseminate knowledge of the physical, chemical and biological phenomena and processes in structures that have at least one lengthscale ranging from molecular to approximately 100 nm (or submicron in some situations), and exhibit improved and novel properties that are a direct result of their small size. Nanoparticle research is a key component of nanoscience, nanoengineering and nanotechnology. The focus of the Journal is on the specific concepts, properties, phenomena, and processes related to particles, tubes, layers, macromolecules, clusters and other finite structures of the nanoscale size range. Synthesis, assembly, transport, reactivity, and stability of such structures are considered. Development of in-situ and ex-situ instrumentation for characterization of nanoparticles and their interfaces should be based on new principles for probing properties and phenomena not well understood at the nanometer scale. Modeling and simulation may include atom-based quantum mechanics; molecular dynamics; single-particle, multi-body and continuum based models; fractals; other methods suitable for modeling particle synthesis, assembling and interaction processes. Realization and application of systems, structures and devices with novel functions obtained via precursor nanoparticles is emphasized. Approaches may include gas-, liquid-, solid-, and vacuum-based processes, size reduction, chemical- and bio-self assembly. Contributions include utilization of nanoparticle systems for enhancing a phenomenon or process and particle assembling into hierarchical structures, as well as formulation and the administration of drugs. Synergistic approaches originating from different disciplines and technologies, and interaction between the research providers and users in this field, are encouraged.