金涂层氧化铁磁性纳米粒子在水中催化的醇类氧化反应

IF 2.2 4区 化学 Q3 CHEMISTRY, MULTIDISCIPLINARY Journal of the Iranian Chemical Society Pub Date : 2024-08-14 DOI:10.1007/s13738-024-03068-w
Neda Motaghed, Rakhshan Hakimelahi, Majid Moghadam, Sahar Baniyaghoob
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摘要

合成了金涂层磁性氧化铁纳米颗粒(ION)(Fe3O4@Au),并将其用作叔丁基过氧化氢(TBHP)氧化酒精的催化剂。首先制备了氧化铁磁性纳米粒子(Fe3O4),最后在其表面镀上一层薄金。通过 XRD、TGA 和 FT-IR 分析对 Fe3O4@Au 纳米催化剂的结构和组成进行了表征。通过 TEM 确定了颗粒的大小、形态和尺寸。用原子力显微镜技术研究了涂层纳米粒子的表面性质和形貌。利用 VSM 技术测量了 Fe3O4 和 Fe3O4@Au 纳米粒子的磁性能。在确认了金涂层磁性离子的结构后,研究了其在水中用 TBHP 氧化各种脂肪族和芳香族醇的性能。最后,评估了 Fe3O4@Au 纳米催化剂在 4-甲氧基苄醇氧化中连续使用五个周期后的可重复使用性。测量结果表明,金涂层氧化铁磁性纳米粒子可在醇类氧化过程中高效重复使用。
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Catalytic oxidation of alcohols catalyzed by gold-coated iron oxide magnetic nanoparticles in water

Gold-coated magnetic iron oxide nanoparticles (ION) (Fe3O4@Au) were synthesized and utilized as catalyst for alcohol oxidation with tert-butyl hydroperoxide (TBHP). First, iron oxide magnetic nanoparticles (Fe3O4) were prepared and finally coated with a thin layer of gold. Structure and composition of Fe3O4@Au nanocatalyst were characterized by XRD, TGA, and FT-IR analysis. Size and morphology and size of particles were determined through TEM. Surface properties and topographies of coated nanoparticles were investigated by the AFM technique. The magnetic properties of Fe3O4 and Fe3O4@Au nanoparticles were measured by VSM technique. After confirming the structure of gold-coated magnetic ION, its performance for the oxidation of various aliphatic and aromatic alcohols with TBHP was studied in water. Finally, the reusability of Fe3O4@Au nanocatalyst was evaluated after five consecutive cycles in the 4-methoxybenzyl alcohol oxidation. The measured results revealed that the gold-coated iron oxide magnetic nanoparticles can be reused well in the oxidation processes of alcohols with high efficiency.

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来源期刊
CiteScore
4.40
自引率
8.30%
发文量
230
审稿时长
5.6 months
期刊介绍: JICS is an international journal covering general fields of chemistry. JICS welcomes high quality original papers in English dealing with experimental, theoretical and applied research related to all branches of chemistry. These include the fields of analytical, inorganic, organic and physical chemistry as well as the chemical biology area. Review articles discussing specific areas of chemistry of current chemical or biological importance are also published. JICS ensures visibility of your research results to a worldwide audience in science. You are kindly invited to submit your manuscript to the Editor-in-Chief or Regional Editor. All contributions in the form of original papers or short communications will be peer reviewed and published free of charge after acceptance.
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