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

被引：14
|
作者：
Peng, Liang [1 ]
Zeng, Qingru [1 ]
Song, Huijuan [1 ]
Qin, Pufeng [1 ]
Lei, Ming [1 ]
Tie, Boqing [1 ]
Wang, Tianyang [1 ]
机构：
[1] Hunan Agr Univ, Coll Resource & Environm, Changsha 410128, Hunan, Peoples R China
来源：
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2011年 / 105卷 / 02期
基金：
中国国家自然科学基金;
关键词：
OXYGEN GAS; SENSORS; FILMS; NANOPARTICLES; WATER; OXIDE; MECHANISMS; TIO2;
D O I：
10.1007/s00339-011-6530-x
中图分类号：
T [工业技术];
学科分类号：
08 ;
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.
引用
收藏
页码：387 / 392
页数：6
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