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

页码：387 / 392

页数：6

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