Issue 37, 2013
From the journal:

Journal of Materials Chemistry A

One-dimensional CuO–SnO2 p–n heterojunctions for enhanced detection of H2S†

Irina Giebelhaus,a   Elena Varechkina,b   Thomas Fischer,a   Marina Rumyantseva,b   Vladimir Ivanov,c   Alexander Gaskov,b   Joan Ramon Morante,d   Jordi Arbiol,e   Wieland Tyrraa  and  Sanjay Mathur*a  

* Corresponding authors

a Inorganic and Materials Chemistry, University of Cologne, Department of Chemistry, Greinstraße 6, D-50939 Cologne, Germany
E-mail: sanjay.mathur@uni-koeln.de

b Laboratory of Chemistry and Physics of Semiconductor and Sensor Materials, Moscow State University, Department of Chemistry, Leninskie Gory 1-3, 119991 Moscow, Russia
E-mail: gaskov@inorg.chem.msu.ru, roum@inorg.chem.msu.ru

c Kurnakov Institute of General and Inorganic Chemistry RAS, 119991 Moscow, Russia
E-mail: van@igic.ras.ru

d Department of Advanced Materials for Energy Applications, Catalonia Institute for Energy Research (IREC), E-08930 Sant Adria del Besos, Spain
E-mail: jrmorante@irec.ca

e ICREA and Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, E-08193 Bellaterra, Spain
E-mail: arbiol@icrea.cat

Abstract

Highly crystalline SnO2 nanowires were synthesized and functionalized with copper particles in a CVD using Sn(OBut)4 and [CuII((C5H4N)(CHCOCF3))2]2 (1) as precursors respectively. Controlled oxidation of Cu to CuO led to the formation of CuO@SnO2 p–n heterojunctions, which were found to be highly sensitive and selective towards the detection of H2S gas. The change in the conductance upon exposure to H2S gas was attributed to the formation of CuS resulting in the shrinkage of the space charge region along the SnO2 nanowire and a concomitant increase of the conductivity channel in an individual nanowire.

Graphical abstract: One-dimensional CuO–SnO2 p–n heterojunctions for enhanced detection of H2S

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Article information

DOI
https://doi.org/10.1039/C3TA11867C
Article type
Paper
Submitted
11 May 2013
Accepted
10 Jul 2013
First published
10 Jul 2013

J. Mater. Chem. A, 2013,1, 11261-11268

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One-dimensional CuO–SnO2 p–n heterojunctions for enhanced detection of H2S

I. Giebelhaus, E. Varechkina, T. Fischer, M. Rumyantseva, V. Ivanov, A. Gaskov, J. R. Morante, J. Arbiol, W. Tyrra and S. Mathur, J. Mater. Chem. A, 2013, 1, 11261 DOI: 10.1039/C3TA11867C

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