摘要
采用原位杂化技术和水热碳化技术相结合的方法,以壳聚糖作为碳源,实现了壳聚糖基碳原位包覆的Fe3O4纳米颗粒的制备,并对其物相、形貌以及磁性进行了系统研究。XRD结果表明原位杂化技术实现了壳聚糖原位包覆Fe3O4纳米颗粒(CS-MNP)的制备;CS-MNP经水热碳化后实现了壳聚糖基碳原位包覆的Fe3O4纳米颗粒(C-MNP)的制备,且水热碳化降低了MNP中氧空位的含量(由Fe2.90O4转变为Fe2.94O4)。C-MNP的TEM形貌清晰表明,MNP纳米颗粒粒径约为25nm,且颗粒表面存在显著的碳包覆层。水热碳化前后,C-MNP表现为超顺磁性,且饱和磁化强度较CS-MNP有所上升(由55.5(A·m2)/kg提高到61.5(A·m2)/kg)。
In situ synthesis and hydrothermal carbonization were combined and carbon coated magnetite nanoparticles was synthesized. Its crystal structure, morphologies and magnetic property were investigated. XRD results indicate that chitosan coated magnetite nanoparticles (CS-MNP) are obtained via in situ synthesis. After hydrothermal carbonization, C-MNP is obtained, and the oxygen interspace of MNP is decreased (from Fe2.90O4 to Fe2.94O4 ). The morphologies of C-MNP illustrate that the diameter of MNP is about 25 nm, and significant carbon coating layer is shown. Both CS-MNP and C-MNP are superparamagnetic and their saturated magnetism are 55.5 emu/g and 61.5 emu/g, respectively.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2013年第S1期226-229,共4页
Rare Metal Materials and Engineering
基金
黑龙江省教育厅科学技术研究项目
国家重大科学研究计划(2012CB339300)
城市水资源与水环境国家重点实验室自主课题项目(2010QN05)
