Journal
INDIAN JOURNAL OF PHYSICS
Volume 88, Issue 6, Pages 577-583Publisher
INDIAN ASSOC CULTIVATION SCIENCE
DOI: 10.1007/s12648-014-0454-1
Keywords
Graphene/Al2O3 composites; Chemiresistor; Sensing response; Operating temperature
Categories
Funding
- Sant Gadge Baba Amravati University, Amravati
Ask authors/readers for more resources
Novel chemiresistive gas sensors based on graphene/Al2O3 quantum dots composites were fabricated and examined for carbon dioxide sensing. Composite samples with different wt% of graphene (20-80 wt%) mixing in constant 1 g Al2O3 were prepared and characterized by X-ray diffraction, transmission electron microscopy along with selected area electron diffraction, ultraviolet-visible spectroscopy, fluorescence spectroscopy and thermo gravimetric-differential thermal analysis. The experimental results showed that the graphene/Al2O3-based chemiresistor exhibited much higher sensing response and it enhanced linearly with addition of graphene. The gas sensing mechanism was discussed on the basis of defect chemistry through fluorescence measurements. 80 wt% graphene/Al2O3 composite exhibited good sensing response (10.84) at room temperature, low operating temperature (398 K), fast response time (14 s) and recovery time (22 s) along with good stability.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available