127 documents found, page 1 of 13
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...
Mesoporous silica nanoparticles with manganese and lanthanide salts: synthesis,...
Forte, Andreia; Gago, Sandra; Carrott, Manuela Ribeiro; Carrott, Peter; Alves, Celso; Teodoro, Fernando; Pedrosa, Rui; Marrucho, Isabel M.Several 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 chloride ...
Activated carbons from MDF and PB wood composites – powder and monoliths forms
Nabais, Joao; Mourao, Paulo; Cansado, Isabel; Carrott, Manuela; Gomes, Jose; Carrott, PeterActivated carbons (ACs) have been one of the most important materials used all over the world for many years and they are nowadays still one of the most relevant materials in the adsorption field. These adsorbent materials play a crucial role in our society because of its multiple applications in diverse areas such as food and beverage, health, gas separation and catalysis.. Aacademic and industrial communities...
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...
Produção e caracterização de carvões ativados a partir de resíduos da torrefaçã...
Jesus, Agostinho; Mourão, Paulo; Nabais, Joao; Carrott, Peter; Carrott, ManuelaUtilização de residuos da industria do café para a produção de carvões activados por activação fisica e quimica.
Utilização de desperdícios de madeiras angolanas na produção de carvões activados
Tchikuala, Emilio; Mourão, Paulo; Nabais, Joao; Carrott, Peter; Carrott, ManuelaPela primeira vez, apresentam-se os resultados da produção de adsorventes de carbono a partir de precursores de origem lenhocelulósica, proveniente de madeiras angolanas. Os resultados obtidos com diferentes precursores apresentam algumas diferenças, sugerindo que reagem de forma distinta à ativação com CO2. Os CAs produzidos são predominantemente microporosos mas com diferenças estruturais e da química superfi...
Aplicação de desperdícios de madeira na produção carvões ativados
Mourao, Paulo; Cansado, Isabel; Nabais, Joao; Carrott, Peter; Carrott, ManuelaUtilização de compositos de madeira, produzidos de desperdicios de madeira para a produção de carvões activados e sua caracterização.
Preparation of activated carbons from MDF and PB for application in environment...
Cansado, Isabel; Mourão, Paulo; Almodovar, Vitor; Gomes, Jose; Nabais, Joao; Carrott, Peter; Carrott, ManuelaProdução de carvões activados a partir de MDF e PB por activação fisica e sua utilização para despoluição de águas.