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

共 23 条

[11]

Liu WK, 2005, J PHYS CHEM B, V109, P14486, DOI 10.1021/jp0518781

[12]

MARTINS H, 1998, MULTIVARIATE CALIBRA

[13] Synthesis and use of a novel SnO2 nanomaterial for gas sensing [J].

Nayral, C ;

Viala, E ;

Collière, V ;

Fau, P ;

Senocq, F ;

Maisonnat, A ;

Chaudret, B .

APPLIED SURFACE SCIENCE, 2000, 164 :219-226

[14] The characteristic of photoelectric gas sensing to oxygen and water based on ZnO nanoribbons at room temperature [J].

Peng, Liang ;

Wang, Dejun ;

Yang, Min ;

Xie, Tengfeng ;

Zhao, Qidong .

APPLIED SURFACE SCIENCE, 2008, 254 (09) :2856-2860

[15] Chemical sensing with LiMo3Se3 nanowire films [J].

Qi, XB ;

Osterloh, FE .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2005, 127 (21) :7666-7667

[16] Heterogeneous reaction rate based description of the response kinetics in metal oxide gas sensors [J].

Setkus, A .

SENSORS AND ACTUATORS B-CHEMICAL, 2002, 87 (02) :346-357

[17] Transition metal ion impregnated mesoporous TiO2 for photocatalytic degradation of organic contaminants in water [J].

Tayade, Rajesh J. ;

Kulkarni, Ramchandra G. ;

Jasra, Raksh V. .

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 2006, 45 (15) :5231-5238

[18] Mechanisms of adsorbate-induced surface resistivity-experimental and theoretical developments [J].

Tobin, RG .

SURFACE SCIENCE, 2002, 502 :374-387

[19]

Xie TF, 2000, J PHYS CHEM B, V104, P8177

[20] Toward innovations of gas sensor technology [J].

Yamazoe, N .

SENSORS AND ACTUATORS B-CHEMICAL, 2005, 108 (1-2) :2-14

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