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Highly Crystalline {010} Facet Grown α-MoO3 Nanobelts for Resistive Sensing of n-butanol at Room Temperature

Publication Type : Journal Article

Publisher : Microchimica Acta 186(12) (2019)797 (IF: 5.833).

Source : Microchimica Acta 186(12) (2019)797 (IF: 5.833).

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Campus : Chennai

School : School of Engineering

Center : Amrita Innovation & Research

Department : Electronics and Communication

Verified : Yes

Year : 2019

Abstract : The present work is aimed at developing an n-butanol sensor based on the chemi-resistive principle using MoO3 nanostructures as a sensing element. Highly ordered free-standing α-MoO3 nanobelts were synthesized using hydrothermal technique. The synthesis parameters adapted in the present work have paved a way in obtaining distinct MoO3 nanostructure with minimal process time as compared with the earlier reports. Initially, the formation of monoclinic crystals with an end centered lattice of β-Mo9O26 was observed, which then is transformed into orthorhombic α-MoO3 on calcination at 450 °C for 5 h. XPS profiles of the nanobelts revealed the presence of molybdenum and oxygen in a stoichiometric ratio of 2.6. Penta- and hexa-coordinated defect centers of Mo5+ and oxygen vacancies were observed from the photoluminescence spectra. The nanobelts respond to n-butanol vapors at room temperature with a 75-fold signal increase and response-recovery times of 17 & 10 s, respectively. The lowest detection limit is 1 ppm. The influence of relative humidity on the sensing response was also studied.

Cite this Research Publication : Parthasarathy Srinivasan, and John Bosco BalaguruRayappan, “Highly Crystalline {010} Facet Grown α-MoO3Nanobelts for Resistive Sensing of n-butanol at Room Temperature”, MicrochimicaActa186(12) (2019)797(IF: 5.833). DOI:10.1007/s00604-019-3905-8

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