Generation of highly ordered nanoporous Sb–SnO2 thin films with enhanced ethanol sensing performance at low temperature. (3rd May 2016)

• Record Type: Journal Article
• Authors: Shao, Shaofeng; Koehn, Ralf; Wu, Hongyan; Wu, Tao; Rao, Wei-Feng
• Is Part Of: New journal of chemistry. Volume 40:Number 6(2016:Jun.)
• Page Start: 5523
• Page End: 5530
• Publication Date: 2016-05-03
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/c5nj03463a
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : Highly ordered nanoporous Sb–SnO2 sensing films synthesized through psHT treatment present high sensitivity to 50 ppm ethanol at low temperature. Abstract : Highly ordered nanoporous Sb-doped tin dioxide (Sb–SnO2 ) 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–SnO2 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–SnO2 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.