Título:	TiO2 hollow nanofiber/polyaniline nanocomposites for ammonia detection at room temperature.
Autor:	CONTI, P. P. SANTOS, D. M. dos GOLDTHORPE, I. A. CORREA, D. S.
Afiliación:	DANIEL SOUZA CORREA, CNPDIA.
Año:	2022
Referencia:	Chemistry of Nanomaterials for Energy, Biology and More, v. 8, n. 8, e202200154, 2022.
Páginas:	1 - 9
Descripción:	Ammonia (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
Palabras clave:	Gas pollutants Chemiresistive sensors Toxic gas
ISSN:	2199-692X
DOI:	doi.org/10.1002/cnma.202200154
Tipo de Material:	Artigo de periódico
Acceso:	openAccess
Aparece en las colecciones:	Artigo em periódico indexado (CNPDIA)