Synthesis, characterization and gas sensing performance of V2O5 nano-structure on PET substrate

• Published in: Journal of materials science. Materials in electronics Vol. 30; no. 4; pp. 4238 - 4249
• Main Authors: Thangarasu, R., Thangavel, Elangovan, Chandrasekaran, J., Balasundaram, O. N.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01-02-2019; Springer Nature B.V
• Subjects: Ammonia; Annealing; Characterization and Evaluation of Materials; Chemistry and Materials Science; Detection; Emission analysis; Field emission microscopy; Gas sensors; Materials Science; Morphology; Optical and Electronic Materials; Optical properties; Organic chemistry; Performance enhancement; Positron emission; Recovery time; Scanning electron microscopy; Selectivity; Structural analysis; Substrates; Tomography; Vanadium oxides; Vanadium pentoxide
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-019-00715-4

VO
2
micro rods and V
2
O
5
nano rod (NR) were fabricated through wet chemical method by changing annealing temperature. The influence of annealing-induced on composition, microstructure, surface morphology and optical properties of prepared samples were characterized through XRD, field emission scanning electron microscopy (SEM)–EDS, HRTEM and UV studies respectively. The structural analysis revealed that at 90 °C monoclinic VO
2
phase formation. The annealing temperature from 300 to 700 °C, were found to an orthorhombic V
2
O
5
phase formation. From SEM result we found that microcluster, V
2
O
5
NR with small particle and trapping behaviour of V
2
O
5
NR 90 °C, 300–600 °C and 700 °C respectively. Gas sensing tests reveal that the V
2
O
5
NR on PET substrate has remarkably enhanced performance. It could be detected ammonia gas in a wide concentration range with the very high response, fast response–recovery time, good selectivity and stable repeatability. The superior sensing features indicate the present V
2
O
5
NRs are promising for gas sensors.