Novel nanosynthesis of In2O3 and its application as a resistive gas sensor for sevoflurane anesthetic
authors Karmaoui, M; Leonardi, SG; Tobaldi, DM; Donato, N; Pullar, RC; Seabra, MP; Labrincha, JA; Neri, G
nationality International
journal JOURNAL OF MATERIALS CHEMISTRY B
keywords METAL-OXIDE NANOPARTICLES; AGENT SEVOFLURANE; DIFLUOROMETHYL ETHER; SENSING PROPERTIES; NITROUS-OXIDE; OXYGEN; ISOFLURANE; NANOSTRUCTURES; NANOCRYSTALS; CRYSTALLINE
abstract A novel non-aqueous sol-gel route for synthesizing pure indium oxide (In2O3) nanoparticles (NPs) using indium acetylacetonate and n-butylamine as the reactive solvent, under solvothermal conditions, is herein proposed. The samples were characterized by an advanced X-ray method, whole powder pattern modeling (WPPM) and high-resolution transmission electron microscopy (HR-TEM), showing the exclusive presence of pure In2O3. Diffuse reflectance spectroscopy (DRS) was used to determine the optical band gap (E-g) of the sample. Moreover, these investigations also revealed that the In2O3 nanoparticles are quasi-spherical in shape, with a diameter of around 7 nm as prepared and 9.5 nm after thermal treatment at 250 degrees C. In2O3 NPs worked as highly sensitive sensing interfaces to provide resistance changes during exposure to sevoflurane, a volatile anesthetic agent used in surgical wards. The developed sensor demonstrated a good response and fast response/recovery time towards very low concentrations of sevoflurane in air, suggesting a very attractive application as a real-time monitoring analyzer in a hospital environment.
publisher ROYAL SOC CHEMISTRY
issn 2050-750X
year published 2015
volume 3
issue 3
beginning page 399
ending page 407
digital object identifier (doi) 10.1039/c4tb01177e
web of science category Materials Science, Biomaterials
subject category Materials Science
unique article identifier WOS:000346467200007

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