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引用次数: 25
摘要
利用抗坏血酸在可控条件下还原铁(acac)3，化学合成了Fe3O4和Fe纳米颗粒。观察到，在化学合成过程中加入水会产生Fe3O4纳米颗粒，而如果在没有水的情况下进行反应会产生Fe纳米颗粒，这些纳米颗粒在暴露于空气中会被氧化。本文成功合成了Fe3O4纳米颗粒(15±5 nm)和Fe/iron oxide纳米颗粒(7±1 nm)。本文提出了以水为供氧源的Fe3O4和Fe/氧化铁纳米颗粒的形成/合成机理。通过SEM, TEM, EDAX和XPS进行的物理化学表征支持了该机制。
Fe3O4 and Fe Nanoparticles by Chemical Reduction of Fe(acac)3 by Ascorbic Acid: Role of Water
Nanoparticles of Fe3O4 and Fe are chemically synthesized by reduction of Fe(acac)3 using ascorbic acid in controlled condition. It was observed that addition of water during the chemical synthesis process yields Fe3O4 nanoparticles, whereas if the reaction is carried out in absence of water yields Fe nanoparticles—which get oxidized upon exposure to air atmosphere. Fe3O4 (15 ± 5 nm) and Fe/iron oxide nanoparticles (7 ± 1 nm) were successfully synthesized in the comparative study reported herewith. Mechanism for formation/synthesis of Fe3O4 and Fe/iron oxide nanoparticles is proposed herewith in which added water acts as an oxygen supplier. Physico-chemical characterization done by SEM, TEM, EDAX, and XPS supports the proposed mechanism.
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