Heterostructured p-CuO (nanoparticle)/n-SnO2 (nanowire) devices for selective H2S detection

被引：147

作者：

Shao, F. ^{[1
]}

Hoffmann, M. W. G. ^{[1
,2
]}

Prades, J. D. ^{[2
]}

Zamani, R. ^{[1
,3
]}

Arbiol, J. ^{[3
,4
]}

Morante, J. R. ^{[1
,2
]}

Varechkina, E. ^{[5
]}

Rumyantseva, M. ^{[5
]}

Gaskov, A. ^{[5
]}

Giebelhaus, I. ^{[6
]}

Fischer, T. ^{[6
]}

Mathur, S. ^{[6
]}

Hernandez-Ramirez, F. ^{[1
,2
]}

机构：

[1] Catalonia Inst Energy Res IREC, E-08930 St Adria Del Besos, Spain

[2] Univ Barcelona, Dept Elect, E-08028 Barcelona, Spain

[3] ICMAB CSIC, Inst Ciencia Mat Barcelona, E-08193 Bellaterra, Spain

[4] ICREA, E-08010 Barcelona, Spain

[5] Moscow MV Lomonosov State Univ, Dept Chem, Moscow 119991, Russia

[6] Univ Cologne, Inst Inorgan Chem, D-50939 Cologne, Germany

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2013年 / 181卷

关键词：

H2S; Sensor; Heterostructure; Metal oxide; CuO; SnO2; SENSING PROPERTIES; THERMAL-OXIDATION; GAS SENSORS; CONVERSION;

D O I：

10.1016/j.snb.2013.01.067

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Dihydrogen sulphide (H2S) is a dangerous pollutant released in fossil combustion processes. Here, p-CuO (particle)/n-SnO2 (nanowire) heterostructures were evaluated as selective H2S sensors, and the working principle behind their good performance was qualitatively modelled. It was concluded that the main sensing mechanism was dissimilar to standard redox reactions typical of simple metal oxide devices, but ascribable to the sulphurization of CuO and the consequent variation of the pn-junction band structure at the CuO-SnO2 interfaces. Experimental data showed that these H2S sensors suit well for alarm applications with extremely high selectivity and sensitivity to this gas for concentrations between 1 ppm and 10 ppm. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：130 / 135

页数：6

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