Preparation and characterization of Fe/SiO2 core/shell nanocomposites|YUAN Ming-liang(袁明亮), TAO Jia-hua(陶加华), YAN Guan-jie(闫冠杰),TAN Mei-yi(谭美易), QIU Guan-zhou(邱冠周)-《中国有色金属学报》官方网站|全网首发|论文开放获取

您目前所在的位置：首页 - 期刊简介 - 详细页面

中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 20 No. 4 April 2010

Preparation and characterization of Fe/SiO₂ core/shell nanocomposites

YUAN Ming-liang(袁明亮), TAO Jia-hua(陶加华), YAN Guan-jie(闫冠杰),
TAN Mei-yi(谭美易), QIU Guan-zhou(邱冠周)

（School of Mineral Processing and Bioengineering, Central South University, Changsha 410083, China）

Abstract:In a simple ethanol-water system, the magnetic α-Fe nanoparticles (with an average diameter of 10−40 nm) were prepared by reduction of Fe²⁺ using potassium borohydride in the presence of surfactant. Then the shell was formed by hydrolysis- condensation polymerization of tetraethylorthosilicate (TEOS) on the surface of the Fe particles. The samples were characterized by XRD, TEM, SAED, TG-DSC and VSM. The results indicate that a thin film of silica is coated on the surface of Fe particles through a Si—O—Fe bond. The coated shell of silica can effectively protect the Fe cores from being oxidized.

Key words: core-shell nanocomposites; iron; magnetic properties; nanoparticles

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW