General Synthesis of Homogeneous Hollow Core-Shell Ferrite Microspheres

被引：238

作者：

Li, Zhenmin ^{[1
,2
]}

Lai, Xiaoyong ^{[1
]}

Wang, Hong ^{[1
]}

Mao, Dan ^{[1
]}

Xing, Chaojian ^{[1
]}

Wang, Dan ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China

[2] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2009年 / 113卷 / 07期

基金：

北京市自然科学基金; 中国国家自然科学基金;

关键词：

GAS-SENSING PROPERTIES; HIGHLY CRYSTALLINE; CARBON SPHERES; SENSOR; CATALYSTS; NANOPARTICLES; SENSITIVITY; FABRICATION; METHANOL; FILM;

D O I：

10.1021/jp8094787

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A general method has been developed for the synthesis of homogeneous hollow core-shell microspheres of spinel ferrites (MFe2O4, M = Zn, Co, Ni, Cd) by using carbonaceous saccharide microspheres as template. The products were characterized by X-ray powder diffraction, inductively coupled plasma-atomic emission spectroscopy, scanning electronic microscopy, transmission electron microscopy, and nitrogen sorption measurement. The effects of the concentration of metal salts have been studied using ZnFe2O4 as an example. Increasing the concentration of metal salts could avoid the generation of impurity phase. The core size and shell thickness of hollow spheres obtained can be manipulated by changing the concentration of metal salts. Gas-sensor investigations revealed the ZnFe2O4 hollow spheres used as gas-sensor materials possess high sensitivity and quick responses to organic gases such as ethanol.

引用

页码：2792 / 2797

页数：6

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