69 documents found, page 1 of 7
Poly(ionic liquid)-based aerogels for continuous-flow CO2 upcycling
Barrulas, Raquel V.; Tinajero, Cristopher; Ferreira, Diogo P. N.; Illanes-Bordomás, Carlos; Sans, Victor; Ribeiro Carrott, ManuelaThe atmospheric concentration of CO2 is rising at an alarming pace, creating a pressing need for new and sustainable materials capable of capture and conversion. Poly(ionic liquid)s (PILs) are particularly effective catalysts for processes at or near atmospheric pressure. PILs industrial application poses challenges due to the low porosity of PIL, the limited batch conversion capacity, and the difficulties in r...
In Vitro Antimicrobial Studies of Mesoporous Silica Nanoparticles Comprising An...
Filipe, Luís; Sousa, Telma; Silva, Dário; Santos, Miguel; Ribeiro Carrott, Manuela; Poeta, Patrícia; Branco, Luís; Gago, SandraThe combination of active pharmaceutical ingredients in the form of ionic liquids or organic salts (API-OSILs) with mesoporous silica nanoparticles (MSNs) as drug carriers can provide a useful tool in enhancing the capabilities of current antibiotics, especially against resistant strains of bacteria. In this publication, the preparation of a set of three nanomaterials based on the modification of a MSN surface ...
Assessment of Biomass and Biochar of Maritime Pine as a Porous Medium for Water...
Santos, Rodrigo; Mendes, Miguel; Alexandre, Carlos; Ribeiro Carrott, Manuela; Rodrigues, Abel; Ferreira, AnaPinewood biomass in Portugal can be considered a major source of biochar for soil physical, chemical, and biological edaphic amendment. This work intended to evaluate the aptitude of lab produced biochar for upgrading soil moisture dynamics’ relationships considering mixtures of biochar with silica-based sand. The methodology used focused on the carbonization of pine biomass with inert atmosphere at 300 C, 400 ...
MOF-Based Materials with Sensing Potential: Pyrrolidine-Fused Chlorin at UiO-66...
Queirós, Carla; Moscoso, Francisco G.; Almeida, José; Silva, Ana M. G.; Sousaraei, Ahmad; Cabanillas-González, Juan; Ribeiro Carrott, ManuelaAn efficient strategy to develop porous materials with potential for NO2 sensing was based in the preparation of a metal-organic framework (MOF), UiO-66(Hf), modified with a very small amount of meso-tetrakis(4-carboxyphenyl) N-methylpyrrolidine-fused chlorin (TCPC), TCPC@MOF. Chlorin’s incorporation into the UiO-66(Hf) framework was verified by several characterization methods and revealed that the as-synthesi...
The AEROPILs Generation: Novel Poly(Ionic Liquid)-Based Aerogels for CO2 Capture
Barrulas, Raquel; López-Iglesias, Clara; Zanatta, Marcileia; Casimiro, Teresa; Mármol, Gonzalo; Ribeiro Carrott, Manuela; García-González, Carlos A.CO2 levels in the atmosphere are increasing exponentially. The current climate change effects motivate an urgent need for new and sustainable materials to capture CO2. Porous materials are particularly interesting for processes that take place near atmospheric pressure. However, materials design should not only consider the morphology, but also the chemical identity of the CO2 sorbent to enhance the affinity to...
Boosting antimicrobial activity of ciprofloxacin by functionalization of mesopo...
Mora, Blanca de Juan; Filipe, Luís; Forte, Andreia; Santos, Miguel M.; Alves, Celso; Teodoro, Fernando; Pedrosa, Rui; Ribeiro Carrott, ManuelaMesoporous silica nanoparticles (MSNs) are very promising nanomaterials for treating bacterial infections when combined with pharmaceutical drugs. Herein, we report the preparation of two nanomaterials based on the immobilization of ciprofloxacin in mesoporous silica nanoparticles,either as the counter-ion of the choline derivative cation MSN-[Ch][Cip]) or via anchoring on the surface of amino-group modified MS...
Mesoporous silica nanoparticles with manganese and lanthanide salts: synthesis,...
Forte, Andreia; Gago, Sandra; Ribeiro Carrott, Manuela; Carrott, Peter; Alves, Celso; Teodoro, Fernando; Pedrosa, Rui; Marrucho, Isabel; Branco, LuísSeveral organic salts based on the combination of two different choline derivative cations and [MnCl3]-, [GdCl4]- and [TbCl4]- as anions, were immobilized in mesoporous silica nanoparticles (MSNs) by a two-step synthetic method. Firstly, MSNs were functionalized with choline derivative cations with chloride anions and then the metals were incorporated by the reaction of the chloride with the respective metal ch...
MDF and PB composites wastes used in the production of activated carbons by phy...
Gomes, Jose; Mourao, Paulo; Cansado, Isabel; Nabais, Joao; Carrott, Peter; Ribeiro Carrott, ManuelaO desenvolvimento de materiais de carbono continua a ser, na atualidade, uma das áreas de grande interesse junto das comunidades científica e industrial [1]. Especial atenção é dada à valorização de resíduos da indústria, de baixo valor económico, tentando desta forma resolver problemas de gestão de grandes quantidades de desperdícios [2]. De especial relevo destacamos os resíduos potencialmente perigosos, segu...
Carbon Materials Research in Évora
Carrott, Peter; Ribeiro Carrott, Manuela; Valente Nabais, João; Cansado, Isabel; Mourão, PauloAn overview is presented of the work involving carbon materials which has been carried out in Évora by the Surface and Materials Chemistry Group. Current active interests related to the synthesis or preparation and surface modification of carbon materials, studies of gas phase and liquid phase applications and fundamental studies of adsorption, are highlighted.
Porosity in ion-exchanged and acid activated clays evaluated using n-nonane pre...
Ribeiro Carrott, Manuela; Cansado, Isabel; Carrott, Peter; Russo, P; Castilho, P; Fernandes, C; Catrinescu, C; Breen, CThe applicability of the n-nonane pre-adsorption method for characterising the porosity in clays is presented. Na-SD, a Na+-exchanged purified bentonite, and materials obtained by Al3+-exchange and acid treatments of Na-SD and SAz-1 were used. Nitrogen adsorption isotherms, at -196 ºC, were determined before and after n-nonane pre-adsorption on each of the samples. In all materials, n-nonane remained adsorbed i...