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Issue 4, 2014
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Growth of ordered anodic SnO2 nanochannel layers and their use for H2 gas sensing

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Abstract

In the current work, we present a new self-organizing anodization approach of metallic Sn layers to obtain vertically aligned tin oxide nanochannel structures. For this, we use a sulphide-containing electrolyte and a set of optimized anodizing parameters. The resulting high aspect ratio nanochannel morphologies can be converted into crystalline SnO2 by high temperature annealing and show highly promising H2 sensing properties. We show that these anodic layers can operate at relatively low temperatures (∼80 °C), detecting concentrations as low as 9 ppm, and with extremely fast response and recovery times. This excellent gas-sensing performance is ascribed to the advanced structure, characterized by a crack-free, straight and top-open nanochannel geometry.

Graphical abstract: Growth of ordered anodic SnO2 nanochannel layers and their use for H2 gas sensing

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Supplementary files

Article information


Submitted
15 Sep 2013
Accepted
27 Nov 2013
First published
27 Nov 2013

J. Mater. Chem. A, 2014,2, 915-920
Article type
Communication

Growth of ordered anodic SnO2 nanochannel layers and their use for H2 gas sensing

A. Palacios-Padrós, M. Altomare, A. Tighineanu, R. Kirchgeorg, N. K. Shrestha, I. Díez-Pérez, F. Caballero-Briones, F. Sanz and P. Schmuki, J. Mater. Chem. A, 2014, 2, 915
DOI: 10.1039/C3TA13704J

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