Preprint Article Version 2 Preserved in Portico This version is not peer-reviewed

A PVP Nanofibrous Sensor Doubly Decorated with Mesoporous Graphene to Selectively Detect Acetic Acid Vapours

Paolo Papa
* ,
Emiliano Zampetti
ORCID logo ,
Fabricio Nicolas Molinari
ORCID logo ,
Fabrizio De Cesare
ORCID logo ,
Corrado Di Natale
ORCID logo ,
Giovanna Tranfo
ORCID logo ,
Antonella Macagnano
* ORCID logo
Version 1 : Received: 2 March 2024 / Approved: 4 March 2024 / Online: 5 March 2024 (10:46:55 CET)
Version 2 : Received: 7 March 2024 / Approved: 7 March 2024 / Online: 8 March 2024 (04:33:46 CET)

A peer-reviewed article of this Preprint also exists.

Papa, P.; Zampetti, E.; Molinari, F.N.; De Cesare, F.; Di Natale, C.; Tranfo, G.; Macagnano, A. A Polyvinylpyrrolidone Nanofibrous Sensor Doubly Decorated with Mesoporous Graphene to Selectively Detect Acetic Acid Vapors. Sensors 2024, 24, 2174. Papa, P.; Zampetti, E.; Molinari, F.N.; De Cesare, F.; Di Natale, C.; Tranfo, G.; Macagnano, A. A Polyvinylpyrrolidone Nanofibrous Sensor Doubly Decorated with Mesoporous Graphene to Selectively Detect Acetic Acid Vapors. Sensors 2024, 24, 2174.

Abstract

An original approach has been proposed for designing a nanofibrous (NFs) layer using UV-cured polyvinylpyrrolidone (PVP) as a matrix, incorporating mesoporous graphene carbon (MGC) nanopowder both inside and outside the fibres, creating a sandwich-like structure. This architecture is intended to selectively adsorb and detect acetic acid vapours, which are known to cause health issues in exposed workers. The nanocomposite MGC-PVP-NFs layer was fabricated through electrospinning deposition onto interdigitated microelectrodes (IDEs) and stabilised under UV-light irradiation. To enhance the adhesion of MGC onto the surface of the nanocomposite polymeric fibres, the layer was dipped in a suspension of polyethylenimine (PEI) and MGC. The resulting structure demonstrated promising electrical and sensing properties, including rapid responses, high sensitivity, good linearity, reversibility, repeatability, and selectivity towards acetic acid vapours. Initial testing was conducted in a laboratory using a bench electrometer, followed by validation in a portable sensing device based on consumer electronic components (by ARDUINO®). This portable system was designed to provide a compact, cost-effective solution with high sensing capabilities. Under room temperature and ambient air conditions, both laboratory and portable tests exhibited favourable linear responses, with detection limits of 0.16 and 1 ppm, respectively.

Keywords

acetic acid detection; electrospun nanocomposite nanofibers; mesoporous graphene; selective sensor; portable sensing tool

Subject

Chemistry and Materials Science, Nanotechnology

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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