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, P. Schmuki

Producción científica: Contribución a una revistaArtículorevisión exhaustiva

59 Citas (Scopus)

Resumen

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.

Idioma originalInglés
Páginas (desde-hasta)915-920
Número de páginas6
PublicaciónJournal of Materials Chemistry A
Volumen2
N.º4
DOI
EstadoPublicada - 28 ene. 2014

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