Details
Name
João Pedro MendesCluster
Networked Intelligent SystemsRole
Research AssistantSince
19th October 2016
Nationality
PortugalCentre
Applied PhotonicsContacts
+351220402301
joao.p.mendes@inesctec.pt
2022
Authors
Dias, B; Carvalho, J; Mendes, JP; Almeida, JMMM; Coelho, LCC;
Publication
Polymers
Abstract
2021
Authors
Mendes, JP; Coelho, LCC; Pereira, VP; Azenha, MA; Jorge, PAS; Pereira, CM;
Publication
Chemistry Proceedings
Abstract
2021
Authors
Vasconcelos, H; Matias, A; Jorge, P; Saraiva, C; Mendes, J; Araújo, J; Dias, B; Santos, P; Almeida, JMMM; Coelho, LCC;
Publication
Chemistry Proceedings
Abstract
2021
Authors
Dias, B; Mendes, JP; de Almeida, JMMM; Coelho, LCC;
Publication
Chemistry Proceedings
Abstract
2020
Authors
Mendes, JP; Coelho, L; Pereira, CM; Jorge, PAS;
Publication
U.Porto Journal of Engineering
Abstract
The study of sensing materials to the detection of carbon dioxide (CO2) was achieved using p-nitrophenol (pNPh) as a colorimetric indicator. The sensing material was polymerized (NPLn), functionalized with 3-triethoxysilyl propyl isocyanate (IPTES) which sensitivity was tested in the form of a membrane as is and encapsulated in hollow silica nanoparticles. The sensing membranes were tested in a closed gas system comprising very precise flow controllers to deliver different concentrations of CO2 (vs. N2). The combination of the sensing membranes with multimode optical fibers and a dual-wavelength diode (LED) allows the measurement of the CO2 through the analysis of the induced absorbance changes with a self-referenced ratiometric scheme. The analysis of the sensing materials have shown significant changes in their chemical and physical properties and the results attest these materials with a strong potential for assessing CO2 dynamics in environmental, medical, and industrial applications.
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