Hydrothermal synthesis, growth mechanism and gas sensing properties of Zn-doped α-Fe2O3 microcubes

被引：34

作者：

Song, HaoJie ^{[1
]}

Sun, Yali ^{[1
]}

Jia, XiaoHua ^{[2
]}

机构：

[1] Jiangsu Univ, Sch Mat Sci & Engn, Zhenjiang 212013, Jiangsu, Peoples R China

[2] Jiangsu Univ, Sch Environm & Safety Engn, Zhenjiang 212013, Jiangsu, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2015年 / 41卷 / 10期

基金：

中国国家自然科学基金;

关键词：

Zn-doped alpha-Fe2O3 microcubes; Hydrothermal synthesis; Growth mechanism; Gas sensing properties; CONTROLLABLE FABRICATION;

D O I：

10.1016/j.ceramint.2015.07.100

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Monodisperse Zn-doped alpha-Fe2O3 microcubes were prepared via a facile hydrothermal method with zinc ions as the structure-directing agents. The observations of FE-SEM and TEM showed that the obtained sample has a quasi-cubic shape with an edge length of about 250 nm. It can be found that the dosage of Zn2+ in the solution had a remarkable effect on the morphology of as synthesized samples. The element analyses of the fabricated microcubes were carried out by XPS and EDS. The investigation on the evolution formation revealed that Zinc ions were critical for controlling the assembly of microcubes. Moreover, the gas sensors based on Zn-doped alpha-Fe2O3 microcubes were fabricated and the gas sensing performances were investigated. It was found that the gas sensor exhibited high response, good selectivity, fast response and recovery time to acetone at the working temperature of 240 degrees C. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：13224 / 13231

页数：8

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