Green Synthesis of Size-Tunable Iron Oxides and Iron Nanoparticles in a Salt Matrix
Green Synthesis of Size-Tunable Iron Oxides and Iron Nanoparticles in a Salt Matrix
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DOI：
10.1021/acssuschemeng.9b03950
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发表时间：
2019-10
影响因子：
8.4
通讯作者：
Mai Thanh Nguyen;Kai Yu;T. Tokunaga;Kornkit Boonyaperm;S. Kheawhom;M. Arita;T. Yonezawa
中科院分区：
文献类型：
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作者：
Mai Thanh Nguyen;Kai Yu;T. Tokunaga;Kornkit Boonyaperm;S. Kheawhom;M. Arita;T. Yonezawa
本研究致力于通过油酸铁（III）的热分解和油酸铁（III）或氧化铁纳米颗粒在NaCl基质中的H2还原分别合成氧化铁和Fe纳米颗粒（NPs）。降低金属前体与NaCl的重量比和合成温度导致更小的颗粒尺寸。一个更高的均匀性的铁纳米颗粒可以实现与两步合成，即，油酸铁的热分解，然后用H2还原铁氧化物，与铁氧化物和NaCl的研磨之前的还原步骤。本研究中获得的Fe纳米颗粒在空气中长期储存稳定。研究发现，颗粒表面的薄氧化物层和C层是其稳定性的主要原因。
This research is devoted for the synthesis of Fe oxide and Fe nanoparticles (NPs) via, respectively, thermal decomposition of iron(III) oleate and H2 reduction of either iron(III) oleate or iron oxide NPs in a NaCl matrix. Lowering the weight ratios of metal precursor to NaCl and synthesis temperature results in smaller particle sizes. A higher uniformity of Fe NPs can be achieved with a two-step synthesis, that is, thermal decomposition of iron oleate followed by H2 reduction of iron oxides, with the milling of iron oxides and NaCl prior to the reduction step. Fe NPs obtained in this study are stable in the air for long-time storage. It is found that thin oxide and C layers on the particle surface are responsible for their stability.