TiO2 hollow nanofiber/polyaniline nanocomposites for ammonia detection at room temperature.

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dc.contributorDANIEL SOUZA CORREA, CNPDIA.
dc.creatorCONTI, P. P.
dc.creatorSANTOS, D. M. dos
dc.creatorGOLDTHORPE, I. A.
dc.creatorCORREA, D. S.
dc.date2022-09-27T21:06:12Z
dc.date2022-09-27T21:06:12Z
dc.date2022-09-27
dc.date2022
dc.date.accessioned2026-07-07T04:28:54Z
dc.descriptionAmmonia (NH3) detection has gained considerable attention in agricultural and environmental monitoring, chemical and pharmaceutical processing, and disease diagnosis, which requires the development of sensors with high sensitivity. Herein, we propose a novel gas sensor based on nanocomposites of TiO2 hollow nanofibers and polyaniline (PANI) for the sensitive detection of ammonia at room temperature. TiO2 nanostructures in anatase phase were prepared by the combination of coaxial electrospinning and calcination treatment. The resulting material was mixed with PANI and deposited onto gold interdigitated electrodes (IDEs). The hybrid platforms exhibited superior sensing performance compared to the platform based on their individual phases, which is ascribed to a synergistic effect from p-n heterojunction formation. Specifically, the platforms based on TiO2/PANI nanocomposite showed a fast response towards NH3 (e.g., 55 s at 10 ppm) at room temperature (25°C). Additionally, the platform demonstrated the ability to detect NH3 at low concentrations (10?30 ppm) and a detection mechanism was proposed to explain the results. Overall, these results show the promise of electrospun TiO2 hollow nanofibers/PANI composites for the development of high-performance room temperature ammonia sensors
dc.format1 - 9
dc.identifierChemistry of Nanomaterials for Energy, Biology and More, v. 8, n. 8, e202200154, 2022.
dc.identifier2199-692X
dc.identifierhttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1146890
dc.identifierdoi.org/10.1002/cnma.202200154
dc.identifier.urihttp://hdl.handle.net/123456789/462854
dc.languageeng
dc.rightsopenAccess
dc.subjectGas pollutants
dc.subjectChemiresistive sensors
dc.subjectToxic gas
dc.titleTiO2 hollow nanofiber/polyaniline nanocomposites for ammonia detection at room temperature.
dc.typeArtigo de periódico

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