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

页码：3985 / 3989

页数：5

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