TY - JOUR
T1 - Exploring the compositional space of a metal-organic framework with ionic liquids to develop porous ionic conductors for enhanced signal and selectivity in VOC capacitive sensors
AU - Gonçalves, Bruna F.
AU - Fernández, Eduardo
AU - Valverde, Ainara
AU - Gaboardi, Mattia
AU - Salazar, Hugo
AU - Petrenko, Viktor
AU - Porro, José María
AU - Cavalcanti, Leide P.
AU - Urtiaga, Karmele
AU - Esperança, José M. S. S.
AU - Correia, Daniela M.
AU - Fernandez-Alonso, Felix
AU - Lanceros-Mendez, Senentxu
AU - Fernández de Luis, Roberto
N1 - Funding Information:
Financial support for this work has been secured through Grants PID2020-114506GB-I00 funded by MCIN/AEI/10.13039/501100011033; TED2021-129457B-I00 funded by MCIN/AEI/10.13039/501100011033, EVOLMOF PID2021-122940OB-C31 (AEI/FEDER, UE) (including FEDER financial support), ENZYMOF (TED2021-130621B-C42). This study forms part of the Advanced Materials Programme and was supported by MCIN with funding from European Union NextGenerationEU (PRTR-C17.I1). We acknowledge the continued support received from the IKUR Strategy under the collaboration agreement between Ikerbasque Foundation and the Materials Physics Center and BCMaterials on behalf of the Department of Education of the Basque Government. Basque Government Industry and Education Departments under the ELKARTEK and PIBA (PIBA-2022-1-0032) programs are also acknowledged. The MSCA-RISE-2017 (No. 778412) INDESMOF, which received funding from the European Union's Horizon 2020 Research and Innovation Programme, is also acknowledged. Finally we acknowledge the Portuguese Foundation for Science and Technology (FCT) through projects UID/QUI/00686/2020, UIDB/50006/2020, UIDP/50006/2020, LA/P/0008/2020, and 2022.05932.PTDC and an investigator FCT Contract 2020.02915.CEECIND (D. M. C.).
Publisher Copyright:
© 2024 The Royal Society of Chemistry.
PY - 2024/6/18
Y1 - 2024/6/18
N2 - The monitoring of atmospheric pollutants, especially non-methane-based volatile organic compounds (NMVOCs), is an important paradigm towards secure air quality surroundings. However, existing gas sensing technologies face challenges in selectively and sensitively detecting individual NMVOCs due to their low concentration in comparison to the main atmospheric components. In this research, the compositional space between a Metal-Organic Framework (MOF) and Ionic Liquids (ILs) is explored to fine tune the signal and selectivity of a capacitive gas sensing layer. Firstly, by tuning the weight ratio of the MOF : IL components, ionic conductive materials ranging from solid porous to partially porous inks are produced. Secondly, by combining the sensitivity arising from the IL's dielectric characteristics with the selectivity endowed by the MOF's porosity, varied capacitive responses are obtained. Finally, the sensing responses of thirteen sensors towards the detection of water vapor, ethanol, acetone and isopropanol demonstrate that the hybridization of the MOF/IL offers a suitable avenue to balance the porosity, magnitude of response, and partial selectivity. In addition, when the responses of multiple MOF/IL sensors are evaluated, cross-selectivity detection of individual NMVOCs is reached. This approach contributes to fine-tuning the MOF/IL sensor performance not just by expanding the MOF/IL combinations, but optimizing sensor processing by advanced printing and electronics design.
AB - The monitoring of atmospheric pollutants, especially non-methane-based volatile organic compounds (NMVOCs), is an important paradigm towards secure air quality surroundings. However, existing gas sensing technologies face challenges in selectively and sensitively detecting individual NMVOCs due to their low concentration in comparison to the main atmospheric components. In this research, the compositional space between a Metal-Organic Framework (MOF) and Ionic Liquids (ILs) is explored to fine tune the signal and selectivity of a capacitive gas sensing layer. Firstly, by tuning the weight ratio of the MOF : IL components, ionic conductive materials ranging from solid porous to partially porous inks are produced. Secondly, by combining the sensitivity arising from the IL's dielectric characteristics with the selectivity endowed by the MOF's porosity, varied capacitive responses are obtained. Finally, the sensing responses of thirteen sensors towards the detection of water vapor, ethanol, acetone and isopropanol demonstrate that the hybridization of the MOF/IL offers a suitable avenue to balance the porosity, magnitude of response, and partial selectivity. In addition, when the responses of multiple MOF/IL sensors are evaluated, cross-selectivity detection of individual NMVOCs is reached. This approach contributes to fine-tuning the MOF/IL sensor performance not just by expanding the MOF/IL combinations, but optimizing sensor processing by advanced printing and electronics design.
UR - http://www.scopus.com/inward/record.url?scp=85193597216&partnerID=8YFLogxK
U2 - 10.1039/d4ta00959b
DO - 10.1039/d4ta00959b
M3 - Article
AN - SCOPUS:85193597216
SN - 2050-7488
VL - 12
SP - 14595
EP - 14607
JO - Journal of Materials Chemistry A
JF - Journal of Materials Chemistry A
IS - 24
ER -