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Tailoring the structure and properties of iron oxide nanoparticles through the oxygen species of borate glass matrix
Journal of Non-Crystalline Solids ( IF 3.2 ) Pub Date : 2020-06-23 , DOI: 10.1016/j.jnoncrysol.2020.120241
M. Hamed Misbah , H. Doweidar , R. Ramadan , Maged El-Kemary

The synergistic combination of semiconductor properties and glass polymeric structure is crucial for engineering practical nanomaterials with properties superior to those of the individual components. Herein, the structure of iron borate glass-ceramic and the evolution of haematite (α–Fe2O3) and magnetite (Fe3O4) nanoparticles have been investigated. The effect of borate matrix on the physical properties of these nanoparticles, as well as the microstructure of the resulted glass-ceramic matrix, has been studied. The band gaps of these nanoparticles were reduced due to contribution of the dangling oxygen atoms found in B2O3 matrix, such as BO4̅ and NBOs units, to the maximum valence bands. Furthermore, B2O3 plays an important role in dispersing the α–Fe2O3 and Fe3O4 nanoparticles and retaining their magnetic behaviour, since the average size of these nanoparticles is smaller than the critical diameter of a single domain size.



中文翻译:

通过硼酸盐玻璃基体中的氧来调节氧化铁纳米粒子的结构和性能

半导体性能和玻璃聚合物结构的协同结合对于工程实用的纳米材料具有优于单个组件的性能至关重要。在此,研究了硼酸铁玻璃陶瓷的结构以及赤铁矿(α–Fe 2 O 3)和磁铁矿(Fe 3 O 4)纳米粒子的演化。研究了硼酸盐基质对这些纳米颗粒的物理性质的影响,以及所得玻璃陶瓷基质的微观结构。由于存在于B 2 O 3基质(例如BO 4)中的悬空氧原子的贡献,这些纳米颗粒的带隙减小了̅和NBOs单位,最大价带。此外,B 2 O 3在分散α–Fe 2 O 3和Fe 3 O 4纳米粒子并保持其磁性行为方面起着重要作用,因为这些纳米粒子的平均尺寸小于单个畴尺寸的临界直径。

更新日期:2020-06-23
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