Mechano-thermal synthesis and characterization of nano-structured Fe/FeS for application in photocatalysis

作     者：H. Esmaili S. Sheibani F. Rashchi 

作者机构：School of Metallurgy and Materials Engineering College of Engineering University of Tehran Tehran 11155-4563 Iran 

出 版 物：《Particuology》 (颗粒学报（英文版）)

年 卷 期：2018年第16卷第2期

页      面：72-80页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 080801[工学-电机与电器] 0808[工学-电气工程] 08[工学] 

基　　金：support of University of Tehran supports of Iran Nanotechnology Initiative Council 

主　　题：Fe/FeS Core shell Mechano therma Nano structure Photocatalyst 

摘      要：A novel method was used to prepare a nano-structured 32 wt% Fe/FeS core/shell powder via a mechanothermal route by l-h heat treatment of a mechanically activated powder mixture of Fe and S. The structural and microstructural characteristics, formation mechanism, magnetic properties, and photocatalytic activity of the powder were studied by X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy, surface area analysis, differential scanning calorimetry, vibrating sample magnetometry, and UV-vis spectrophotometry. A detailed study of the mechanism of transformation showed that during the heat treatment process, an FeS2 phase was formed as the intermediate product. In the final product, an FeS shell approximately 2 nm in thickness was formed on the Fe core. In the presence of NaCI as a process control agent, the particle size decreased and the size distribution became more uniform. Mechanical activation and NaCI addition together led to a decrease of the saturation magnetization from 82 to 74emu/g. The photocatalytic activity of the powder in the degradation of methylene blue was 50%.