Highly sensitive room-temperature gas sensors based on hydrothermal synthesis of Cr2O3 hollow nanospheres

被引：0
|
作者：
Li Sheng [1 ]
Li Feng-Li [1 ]
Zhou Shao-Min [1 ]
Wang Peng [1 ]
Cheng Ke [1 ]
Du Zu-Liang [1 ]
机构：
[1] Henan Univ, Key Lab Special Funct Mat, Minist Educ, Kaifeng 475004, Peoples R China
来源：
CHINESE PHYSICS B | 2009年 / 18卷 / 09期
基金：
中国国家自然科学基金;
关键词：
Cr2O3; hollow nanospheres; gas sensing; surface photovoltage; OXIDE THIN-FILMS; SURFACE PHOTOVOLTAGE; SENSING PROPERTIES; PRECURSOR ROUTE; SPECTROSCOPY; CHARACTERS; BEHAVIOR; SILICA; SNO2;
D O I：
暂无
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
This paper reports that Cr2O3 hollow nanospheres (HNs) were synthesized via a hydrothermal approach and characterized by scanning electron microscopy, x-ray powder diffraction, transmission electron microscopy (TEM), selective area electron diffraction and high resolution TEM, respectively. In addition, the room-temperature (RT) gas sensing proper-ties of Cr2O3 HNs and conventional powders (CPs) were investigated by means of the surface photovoltage technique. The experimental data demonstrate that the RT gas sensor of the as-fabricated HNs reaches below 5 ppm whereas that of the CPs is about 40 ppm, which results from there being much more adsorbed and desorbed oxygen in HNs than in CPs at RT. The as-prepared Cr2O3 HNs could have potential applications as RT nanosensors.
引用
收藏
页码：3985 / 3989
页数：5
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