Generation of highly ordered nanoporous Sb–SnO 2 thin films with enhanced ethanol sensing performance at low temperature

Highly ordered nanoporous Sb-doped tin dioxide (Sb–SnO 2 ) thin films are crystallized by 120 °C post-synthetic hydrothermal treatment for gas sensing applications. The resulting thin films can be annealed, as desired, at temperatures of up to 600 °C for removing the templates and tuning the sensiti...

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Bibliographic Details
Published in:New journal of chemistry 2016, Vol.40 (6), p.5523-5530
Main Authors: Shao, Shaofeng, Koehn, Ralf, Wu, Hongyan, Wu, Tao, Rao, Wei-Feng
Format: Article
Language:English
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Summary:Highly ordered nanoporous Sb-doped tin dioxide (Sb–SnO 2 ) thin films are crystallized by 120 °C post-synthetic hydrothermal treatment for gas sensing applications. The resulting thin films can be annealed, as desired, at temperatures of up to 600 °C for removing the templates and tuning the sensitivities without destroying the nanostructures. It is found that Sb–SnO 2 films doped with 8 wt% Sb can well satisfy the demands for high gas sensitivity at low operation temperature, e.g. , a change of ∼30 times of electric resistance in response to 50 ppm ethanol is rapidly detected at temperatures as low as 100 °C. The structure, crystallinity, and composition of the ordered nanoporous Sb–SnO 2 thin films are characterized by HRTEM, FESEM, SAED, and STEM. The developed synthesis method represents a flexible route generally applicable for preparing nanoporous metal oxide crystalline films for applications including gas sensing, photocatalysis, and 3rd generation photovoltaics.
ISSN:1144-0546
1369-9261
DOI:10.1039/C5NJ03463A