Near room temperature sensing of nitric oxide using SnO2/Ni-decorated natural cellulosic graphene nanohybrid film

In recent years, metal oxide nanoparticles and their composites with graphene have received significant research attention in toxic gas sensor applications. Herein, we demonstrate a novel approach to develop a sensor by combining SnO 2 nanoparticles and Ni-decorated natural cellulosic graphene (Ni-N...

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Bibliographic Details
Published in:Journal of materials science. Materials in electronics 2018-12, Vol.29 (23), p.20162-20171
Main Authors: Gupta Chatterjee, S., Dey, S., Samanta, D., Santra, S., Chatterjee, S., Guha, P. K., Chakraborty, Amit K.
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Decoration
Gas sensors
Graphene
Materials Science
Morphology
Nanoparticles
Nickel
Nitric oxide
Optical and Electronic Materials
Reproducibility
Room temperature
Sensors
Surface area
Temperature
Tin dioxide
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Summary:In recent years, metal oxide nanoparticles and their composites with graphene have received significant research attention in toxic gas sensor applications. Herein, we demonstrate a novel approach to develop a sensor by combining SnO 2 nanoparticles and Ni-decorated natural cellulosic graphene (Ni-NCG) derived from lotus petals to form SnO 2 /Ni-NCG nanohybrid. The morphology, microstructure and elemental composition of the nanohybrids were investigated by a number of techniques which confirmed presence of nanometer sized SnO 2 particles having large surface area on sheets of few layered Ni-decorated NCG. Upto 15% response was observed when exposed to 40 ppm of NO with high reproducibility at temperature as low as 60 °C which is remarkable when compared to previously reported SnO 2 based NO sensors operating at high temperatures (~ 200 °C or more). Further, the nanohybrid showed excellent selectivity to NO when tested against other gases. A mechanism have been proposed for the improved sensitivity at low temperature based on the improved surface area of SnO 2 nanoparticles leading to larger adsorption of gas molecules combined with an improved conduction of charges provided by the Ni-decorated NCG network. The results show enormous potential for the SnO 2 /Ni-NCG nanohybrid film as near room temperature NO sensor.
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-018-0149-z