Facile and green preparation of magnetite/zeolite nanocomposites for energy application in a single-step procedure
Facile and green preparation of magnetite/zeolite nanocomposites for energy application in a single-step procedure
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DOI：
10.1016/j.jallcom.2017.05.028
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发表时间：
2017-09-30
影响因子：
6.2
通讯作者：
Abdullah, Luqman Chuah
中科院分区：
文献类型：
--
作者：
Abdullah, Nurul Hidayah;Shameli, Kamyar;Abdullah, Luqman Chuah
本文提出了一种绿色、简便、快速的室温一步法制备磁铁矿/沸石纳米复合材料的方法。粉末X射线衍射（PXRD）的图案的氧化铁纳米粒子（NP）与唯一的沸石显示加宽的沸石峰归因于掺入的Fe 3 O 4。场发射扫描电子显微镜（FESEM）分析表明，Fe 3 O 4。纳米粒子在多孔沸石骨架表面形成。透射电子显微镜（TEM）分析显示Fe 3 O 4纳米颗粒（NPs）大多为球形，平均直径和标准偏差为2.40 +/- 0.41 nm。选区电子衍射（SAED）图谱证实了立方Fe 3 O 4相的存在。振动样品磁强计（VSM）的结果表明，合成的样品具有约6.52 emu g（-1）的饱和磁化强度。磁铁矿/沸石-NC可以被认为是氧还原反应（ORR）过程的低成本替代催化剂。电化学测量表明，磁铁矿/沸石-NC对ORR的性能随着扫描速率从20 mV s（-1）增加到500 mV s（-1）而增加。在碱性介质中，有机物还原反应是一个扩散控制的过程。(C)2017爱思唯尔B. V.保留所有权利。
This paper presents a green, facile and rapid method to prepare magnetite/zeolite-nanocomposites (NCs) in one step procedure at ambient temperature. The powder X-ray diffraction (PXRD) pattern of iron oxide nanoparticles (NPs) with the sole zeolite showed the broadening of zeolite peaks attributed to the incorporation of Fe3O4. Field-emission scanning electron microscopy (FESEM) analysis depicted that the Fe3O4. NPs were formed on the surface of porous zeolite framework. Transmission electron microscopy (TEM) analysis displayed the Fe3O4 nanoparticles (NPs) were mostly in spherical shape with a mean diameter and standard deviation of 2.40 +/- 0.41 nm. The selected-area electron diffraction (SAED) pattern confirmed the presence of cubic Fe3O4 phase. The vibrating sample magnetometer (VSM) results indicated the as-synthesized sample has a saturation magnetization of around 6.52 emu g(-1). The magnetite/zeolite-NCs can be considered as a low-cost alternative catalyst for oxygen reduction reaction (ORR) process. The electrochemical measurement showed that the performance of magnetite/zeolite-NCs towards the ORR increased as the scan rate increased from 20 mV s(-1) to 500 mV s(-1). The ORR is a diffusioncontrolled process in the alkaline medium. (C) 2017 Elsevier B.V. All rights reserved.