Autor segons l'article: Casanova-Chafer, Juan; Umek, Polona; Acosta, Selene; Bittencourt, Carla; Llobet, Eduard;
Departament: Enginyeria Electrònica, Elèctrica i Automàtica
Autor/s de la URV: Casanova Chafer, Juan / Llobet Valero, Eduard
Paraules clau: Xps X ray spectroscopy X ray photoelectron spectroscopy Trace-level detection Synthesis (chemical) Surface functionalization Stability Sensors Room-temperature conditions Room temperature Relative abundance Polypyrroles Polypyrrole nanoparticles Polymers Physicochemical properties Nanoparticles Material characterizations Long term stability Limit of detection Graphene Gases Gas-sensing properties Gas sensor Gas detectors Films Evolution Electronic properties Electronic assessment Degradation Chemo-resistive gas sensors Chemical sensors Chemical detection Band-structure Ammonia detection Ammonia Ambient monitoring Air-quality Air quality
Resum: The outstanding versatility of graphene for surface functionalization has been exploited by its decoration with synthesized polypyrrole (PPy) nanoparticles (NPs). A green, facile, and easily scalable for mass production nanocomposite development was proposed, and the resulting PPy@Graphene was implemented in chemoresistive gas sensors able to detect trace levels of ammonia (NH3) under room-temperature conditions. Gas exposure for 5 min revealed that the presence of nanoparticles decorating graphene entail greater sensitivity (13-fold) in comparison to the bare graphene performance. Noteworthy, excellent repeatability (0.7% of relative error) and a low limit of detection of 491 ppb were obtained, together with excellent long-term stability. Besides, an extensive material characterization was conducted, and vibration bands obtained via Raman spectroscopy confirmed the formation of PPy NPs, while X-ray spectroscopy (XPS) revealed the relative abundance of the different species, as polarons and bipolarons. Additionally, XPS analyses were conducted before and after NH3 exposure to assess the PPy aging and the changes induced in their physicochemical and electronic properties. Specifically, the gas sensor was tested during a 5-month period, demonstrating significant stability over time, since just a slight decrease (11%) in the responses was registered. In summary, the present work reports for the first time the use of PPy NPs decorating graphene for gas-sensing purposes, revealing promising properties for the development of unattended gas-sensing networks for monitoring air quality.
Àrees temàtiques: Química Nanoscience and nanotechnology Nanoscience & nanotechnology Medicine (miscellaneous) Medicina veterinaria Medicina ii Medicina i Materials science, multidisciplinary Materials science (miscellaneous) Materials science (all) Materiais Interdisciplinar General materials science Farmacia Engenharias iv Engenharias iii Engenharias ii Economia Ciências biológicas iii Ciências biológicas ii Ciências biológicas i Ciências ambientais Ciências agrárias i Biotecnología Biodiversidade Astronomia / física Arquitetura, urbanismo e design
Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
Adreça de correu electrònic de l'autor: juan.casanova@urv.cat eduard.llobet@urv.cat
Identificador de l'autor: 0000-0001-6164-4342
Data d'alta del registre: 2024-01-13
Versió de l'article dipositat: info:eu-repo/semantics/publishedVersion
Enllaç font original: https://pubs.acs.org/doi/10.1021/acsami.1c10559
URL Document de llicència: http://repositori.urv.cat/ca/proteccio-de-dades/
Referència a l'article segons font original: Acs Applied Materials & Interfaces. 13 (34): 40909-40921
Referència de l'ítem segons les normes APA: Casanova-Chafer, Juan; Umek, Polona; Acosta, Selene; Bittencourt, Carla; Llobet, Eduard; (2021). Graphene Loading with Polypyrrole Nanoparticles for Trace-Level Detection of Ammonia at Room Temperature. Acs Applied Materials & Interfaces, 13(34), 40909-40921. DOI: 10.1021/acsami.1c10559
DOI de l'article: 10.1021/acsami.1c10559
Entitat: Universitat Rovira i Virgili
Any de publicació de la revista: 2021
Tipus de publicació: Journal Publications
Repositori URV