Paula Barbosa

Paula Barbosa
University of Aveiro | UA · CICECO - Centre for Research in Ceramics and Composite Materials

PhD

About

42
Publications
2,890
Reads
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642
Citations
Introduction
P. Barbosa graduated in Physics and Chemistry (Education) from University of Minho in 2004 and completed a PhD degree in Chemistry from the same University in 2011.At present, holds a contract as Assistant Researcher at U Aveiro / CICECO. Her main scientific interests concern the development of nanostructured materials with nanophase-separated domains and functional nanocomposite membranes for application in advanced electrochemical devices (batteries, display devices and fuel cells).
Additional affiliations
March 2018 - present
University of Aveiro
Position
  • Researcher
Description
  • UniRCell - Unitised Regenerative Fuel Cell for Efficient Renewable Energy Supply: from Materials to Device
October 2013 - February 2018
University of Aveiro
Position
  • PostDoc Position
February 2011 - September 2013
Polytechnic Institute of Viana do Castelo (IPVC)
Position
  • Professor
Education
October 2004 - July 2005
University of Minho
Field of study
  • Postgraduation in Chemistry
September 1999 - May 2004
University of Minho
Field of study
  • Physics and Chemistry (Education)

Publications

Publications (42)
Article
The synthesis and characterization of nanocrystals of the zeolitic imidazolate framework-8 (ZIF8) from zinc nitrate and 2-methylimidazole (Hmim) by a colloidal chemistry route is described in the search for novel protonic conductors. The ZIF8 powders have the sodalite cubic structure with a unit cell parameter slightly in excess of 1.7 nm, a crysta...
Article
Sol–gel hybrid organic-inorganic networks, doped with a lithium salt, have been used as electrolytes in prototype smart windows. The work described in this presentation is focused on the application of these networks as dual-function electrolyte/adhesive components in solid-state electrochromic devices. The performance of multi-layer electrochromic...
Article
Porous robust materials are typically the primary selection of several industrial processes. Many of these compounds are, however, not robust enough to be used as multifunctional materials. This is typically the case of Metal-Organic Frameworks (MOFs) which rarely combine several different excellent functionalities into the same material. In this r...
Article
This paper describes a novel method to produce poly(lactic acid) (PLA) stereocomplex (SC) crystallites directly from high molecular weight PLLA by incorporation of small quantities of choline dihydrogen phosphate ([Ch][DHP]), at room temperature. Combined results of X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and differe...
Article
Laser-induced graphene (LIG) produced by irradiation of paper (paper-LIG)holds substantial promise for flexible devices. This article presents paper-LIG humidity and temperature sensors fabricated by single-step irradiation of common filter paper with a pulsed UV laser (355 nm). The influence of the process parameters on the conversion of cellulose...
Article
Full-text available
[Gd(H4nmp)(H2O)2]Cl∙2H2O (1) converts into [Gd2(H3nmp)2]∙xH2O (2) (x = 1 to 4) with a notable increase in protonic conductivity. 1 is a charged layered material counter balanced by chloride ions, with protonic conductivity values of 1.2310-5 S cm-1 at 98% relative humidity (RH) and 40 ºC. At 98% RH and 94 ºC the observed conductivity is of 0.51 S...
Article
Full-text available
Herein, we present a simple and inexpensive method for the immobilization of Metal–Organic Framework (MOF) particles in the form of pellets and membranes. This processing procedure is possible using polymethacrylate polymer (PMMA) as a binding or coating agent, improving stability and significantly increasing the water repellency. HKUST and MMOF-74...
Article
Novel electrolytes composed of chondroitin sulfate A (CSA) and citric acid (CA) have been prepared using a clean, safe, and fast route. These electrolytes exhibit different physical-chemical properties, depending on the amount of CA. For X > 82.3%, where X is the mass ratio, in %, of CA/(CA + CSA), whitish polycrystalline powders result. Lower amou...
Article
The present work aims at exploiting a polyelectrolyte nanocomposite based on poly(4-styrene sulfonic acid) (PSSA) and bacterial cellulose (BC) as an eco-friendly proton-exchange membrane (PEM) for application in microbial fuel cells (MFCs). The PSSA/BC-based PEM was confirmed as a true nanocomposite by inelastic neutron scattering (INS) vibrational...
Article
Phosphonate- and yttrium-based metal-organic frameworks (MOFs), formulated as [Y(H5btp)]·5.5H2O (1), [Y(H5btp)]·2.5H2O (2), (H3O)[Y2(H5btp)(H4btp)]·H2O (3), and [Y(H5btp)]·H2O·0.5(MeOH) (4), were prepared using a "green" microwave-assisted synthesis methodology which promoted the self-assembly of the tetraphosphonic organic linker [1,1'-biphenyl]-3...
Article
A positively charged lamellar coordination polymer based on a flexible triphosphonic acid linker is reported. [Gd(H4nmp)(H2O)2]Cl⋅2 H2O (1) [H6nmp=nitrilotris(methylenephosphonic acid)] was obtained by a one-pot approach by using water as a green solvent and by forcing the inclusion of additional acid sites by employing HCl in the synthesis. Compou...
Article
This paper reports the application of a polymethacrylate hydroxyethylene resin based electrolyte in electrochromic (EC) devices. The electrolyte is characterized by electrochemical impedance spectroscopy, visible spectroscopy, TGA, DSC, and DRX and tested as an ionic conductor in an EC device with the following configuration: Substrate/IZO/WO3/Poly...
Article
Solid polymer electrolyte (SPE) systems based on interpenetrating blends of poly(ethylene oxide-co-propylene oxide) and poly(methyl methacrylate) host matrices, with lithium perchlorate as guest salt, were prepared. These electrolytes were presented as free-standing films, and their thermal and electrochemical properties were characterized by condu...
Article
In the present work Fourier transform infrared and Raman spectroscopy were used to characterize the cation/polymer, cation/cross-link, cation/anion and hydrogen bonding interactions in hybrid electrolytes composed of lithium tetrafluoroborate (LiBF4) and di-urea cross-linked poly(oxyethylene) (POE)/siloxane hybrid networks (di-ureasils) designated...
Article
Full-text available
The sol-gel process has been used to prepare hybrid electrolytes composed of a poly(oxyethylene) (POE)/siloxane hybrid network doped with lithium tetrafluoroborate (LiBF4) with compositions of n between infinity and 2.5. In this context the lithium salt concentration has been expressed in terms of the number of oxyethylene units in the organic comp...
Article
In this study the results of our characterization of a solid polymer electrolyte based on poly(trimethylene carbonate), henceforth designated as p(TMC), and lithium hexafluorophosphate (LiPF6) are described. Samples of solvent-free electrolytes were prepared with a range of concentration of guest salt using solvent casting from tetrahydrofuran and...
Data
Materials Chemistry and Physics j o u r n a l h o m e p a g e : w w w . e l s e v i e r . c o m / l o c a t e / m a t c h e m p h y s a b s t r a c t In the present work Fourier transform infrared and Raman spectroscopy were used to characterize the cation/polymer, cation/cross-link, cation/anion and hydrogen bonding interactions in hybrid electrol...
Article
Full-text available
In this study the synthesis of an amorphous polymer network, poly[oxymethylene-oligo(oxyethylene)], designated as aPEO, is described. This polymer has been characterized by gel permeation chromatography, thermal analysis, conductivity measurements, evaluation of electrochemical stability and nuclear magnetic resonance spectroscopy. The synthetic pr...
Article
A gelatin-based electrolyte has been developed and characterized by impedance spectroscopy and thermal analysis. These electrolytes are promising materials to be applied in electrochromic devices because gelatine is a material available in nature, it is cheap, easy to handle and to prepare.In this study the characterization of a solid-state electro...
Article
In this study the sol-gel synthetic strategy was used to prepare organic-inorganic hybrid electrolyte systems composed of a di-urea cross-linked poly(ethylene oxide) (PEO)/siloxane (di-ureasil) matrix with a wide concentration range of lithium tetrafluoroborate (LiBF(4)). The assembly and preliminary characterization of a prototype solid-state elec...
Article
Flexible, transparent and self-supporting electrolyte films based on poly(trimethylene carbonate)/poly(ethylene oxide) (p(TMC)/PEO) interpenetrating networks doped with LiClO4 were prepared by the solvent casting technique. These novel solid polymer electrolyte (SPE) systems were characterized by measurements of conductivity, cyclic voltammetry, di...
Article
Ionically conducting materials based on a poly(ɛ-caprolactone) (PCL)/siloxane organic/inorganic host framework doped with magnesium triflate (Mg(CF3SO3)2) were synthesized by the sol–gel process. In this matrix short PCL chains are covalently bonded to the siliceous network via urethane linkages. In this study the salt content of samples was identi...
Article
Nowadays electrochromic materials have been attracting much interest in controllable light-reflective or light-transmissive devices for optical information and storage. These devices have potential use in various applications such automotive industry (rear-view mirrors and visors) and architecture ("smart-windows" for vehicles and buildings) [1]. I...
Article
Solid polymer electrolytes based on poly(trimethylene carbonate) and poly(ethylene oxide) interpenetrating networks doped with lithium hexafluoroantimonate have been prepared and characterized by measurements of ionic conductivity, cyclic voltammetry, differential scanning calorimetry and thermogravimetry. Electrolytes with lithium salt composition...
Article
Sol–gel derived cross-linked PEO/siloxane xerogels (designated as di-ureasils) were prepared using lithium trifluoromethanesulfonyl imide (LiTFSI) as a guest salt. In this paper we describe the assembly of a prototype solid-state electrochromic device (ECD) based on a four-layer sandwich structure, with the following configuration: glass/IZO/WO3/po...
Article
In this study we report the characterization of a prototype solid-state electrochromic device based on poly(ethylene oxide) (PEO)/siloxane hybrid networks doped with lithium bis(trifluoromethanesulfonyl)imide (LiTFSI). The polymer networks prepared. designated as di-ureasils and represented as d-U(2000), were produced by a sol-gel procedure and are...
Article
Polymer electrolytes, which are ubiquitous in all solid state devices, are of profound interest to electrochemists, who transform these materials into interesting multifunctional systems with great potential in many applications, such as super capacitors, solar cells, Li+ batteries, sensors and electrochromic displays (1,2). In this study the resul...
Article
Full-text available
Sol-gel derived poly(oxyethylene)/siloxane hybrids doped with lithium hexafluoroantimonate, LiSbF 6 , have been prepared. Compositions of these novel xerogel electrolytes were identified using the conventional d-U(2000) n LiSbF 6 notation, (where n is the molar ratio of oxyethylene moieties per Li + ion) and samples with n between ∞ and 2.5 were ch...
Article
In this presentation we describe the preparation of solvent-free solid polymer electrolytes (SPEs) by the sol–gel route with the incorporation of controlled quantities of lithium bis(trifluoromethanesulfonyl) imide (LiTFSI) into the host matrix. The host framework of these xerogels, designated as di-ureasils and represented by d-U(900), contains ox...
Article
Fourier Transform mid-infrared and Raman spectroscopies were used to investigate the cation/polymer, cation/urea bridge, cation/anion and hydrogen bonding interactions in poly(oxyethylene) (POE)/siloxane di-ureasil networks prepared by the sol–gel route and doped with lithium bis(trifluoromethanesulfonyl)imide (LiTFSI). Materials with compositions...
Article
The application of solid polymer electrolytes as dual-function electrolyte/adhesive components in electrochromic devices and the preliminary characterization of the resulting prototype displays is described in this paper. An asymmetric device configuration, represented schematically as glass/ZnO:Ga2O3/WO3/polymer electrolyte/ZnO:Ga2O3/glass, was ch...
Article
A series of novel electrolytes based on the terpolymer host, poly(epichlorohydrin-co-ethylene oxide-co-allyl glycidyl ether) with lithium perchlorate and lithium bis(trifluoromethanesulfonyl)imide have been prepared and characterized by conductivity measurements, cyclic voltammetry at a gold microelectrode and thermal analysis.Electrolyte compositi...
Article
Di-urea cross-linked POE/siloxane hybrid ormolytes (di-ureasils) doped with a wide concentration range of lithium perchlorate trihydrate (LiClO4·3H2O) (200≥n≥0.5, where n expresses the salt content in terms of the number of ether oxygen atoms per Li+ ion) have been analysed by Fourier transform infrared and Raman (FT-IR and FT-Raman, respectively)...
Article
Solid polymer electrolytes (SPEs) synthesized by the sol–gel process and designated as di-ureasils have been prepared through the incorporation of lithium perchlorate, LiClO4, into the d-U(2000) organic–inorganic hybrid network. Electrolytes with lithium salt compositions of n (where n indicates the number of oxyethylene units per Li+ ion) between...
Article
The results of the characterization of a polymer electrolyte system based on the poly(trimethylene carbonate) host matrix, with lithium hexafluoroantimonate as guest salt, are described in this study. Electrolytes with lithium salt compositions with values of n between 5 and 100 (where n represents the total number of monomeric cation-coordinating...

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Projects (2)
Project
Glad to share with you that Dr. Filipe Figueiredo and I are serving as Guest Editors for Special Issue entitled "Nanostructured Polymeric Materials for Application in Advanced Electrochemical Devices" in the open-access journal Polymers (ISSN 2073-4360) published by MDPI, Switzerland. This Special Issue aims to give an overview of recent developments in nanostructured polymeric materials and composites in connection with their application as new materials for advanced electrochemical devices, which include energy conversion and storage devices (batteries, fuel cells, electrochemical capacitors), chemical sensors, optoelectronic devices, and biomedical applications. Contributions are very welcome!! For more information on the issue, please visit the Special Issue website at https://www.mdpi.com/journal/polymers/special_issues/nanostruct_polym_mater_appl_adv_electrochem_devic
Project
The UniRCell project aims at developing a future generation of environmentally sustainable and low cost materials for the production of renewable electricity using hydrogen as energy vector in URFCs. http://www.unircell.pt/