Room-temperature gas sensing properties of cobalt-doped ZnO Nanobelts with visible light irradiation

被引：0
|
作者：
Liang Peng
Qingru Zeng
Huijuan Song
Pufeng Qin
Ming Lei
Boqing Tie
Tianyang Wang
机构：
[1] Hunan Agricultural University,College of Resource and Environment
来源：
Applied Physics A | 2011年 / 105卷
关键词：
Visible Light Irradiation; Ethanol Vapor; Contact Potential Difference; Surface Photovoltage; Surface Photovoltage Spectroscopy;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Cobalt-doped ZnO (Co:Zn is 1, 3 and 5 mol%) nanobelts were prepared by a multi-components precursor self-assembled method, and characterized by the scanning electronic microscopy (SEM), X-ray diffraction (XRD), surface photocurrent spectroscopy and surface photovoltage spectroscopy. The room-temperature gas sensing of oxygen and ethanol vapor was measured with irradiation of visible light. The sensitivity is decreased on increasing the doped concentration. The cobalt-doped ZnO (1%) showed higher sensitivity and faster response rate to ethanol than to oxygen. The results are due to a large amount of photo-generated holes left in the surface of cobalt-doped ZnO (1%) nanobelts. And the changed photocurrent intensity was linear as function of the ethanol vapor.
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页码：387 / 392
页数：5
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