Ana Caetano

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

Master of Science

About

18
Publications
3,552
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356
Citations
Introduction
Ana Caetano currently works at the CICECO - Centre for Research in Ceramics and Composite Materials, University of Aveiro. Ana does research in Analytical Chemistry and Materials Chemistry. Their most recent publication is ' Evaluation of reactive Si and Al amounts in various geopolymer precursors by a simple method'.
Education
September 2009 - December 2011
University of Aveiro
Field of study
  • Biorefineries and Renewable Resources
September 2003 - June 2008
University of Aveiro
Field of study
  • Chemistry

Publications

Publications (18)
Article
Full-text available
Environmentally conscious biomorphic ceramics (Ecoceramics) are a new class of material manufactured from renewable resources and wastes. Sustainable cork wastes were pyrolysed, and this activated carbon template infiltrated with a sol-gel precursor (from aqueous green-chemistry) to form TiO2 on heating in air, with the honeycomb microstructure of...
Article
Full-text available
In this work, alkali-activated fly ash-derived foams were produced at room temperature by direct foaming using aluminum powder. The 1 cm3 foams (cubes) were then evaluated as adsorbents to extract heavy metals from aqueous solutions. The foams’ selectivity towards lead, cadmium, zinc, and copper ions was evaluated in single, binary, and multicompon...
Article
Full-text available
Ordinary Portland Cement is the most widely used binder in the construction sector; however, a very high carbon footprint is associated with its production process. Consequently, more sustainable alternative construction materials are being investigated, namely, one-part alkali activated materials (AAMs). In this work, waste-based one-part AAMs bin...
Article
Solar thermochemical conversion of H2O and captured CO2 is considered for the production of high-value solar fuels and CO2 valorization, using non-stoichiometric oxygen-exchange redox materials. This work aims to compare the thermochemical cycle performance of different ceria structures, including biomimetic cork-templated ceria (CTCe), ceria foam...
Article
Water splitting by solar energy-driven two-step thermochemical cycles is a promising approach for large-scale production of renewable fuels (e.g. hydrogen). The key challenge is developing materials capable of withstanding the harsh environmental conditions and to ensure high reliability in use, particularly in terms of redox kinetics and better ac...
Article
FREE TO DOWNLOAD FOR 50 DAYS AT: https://authors.elsevier.com/c/1ZkEC3O1E1GMLC In this investigation, and for the first time, pyrolysed sustainable cork was used to produce waste-based geopolymer-cork composites with enhanced electromagnetic interference (EMI) shielding properties. The influence of the pyrolysed cork amount and the geopolymer poro...
Article
Full-text available
This review explores the advances in the synthesis of ceria materials with specific morphologies or porous macro- and microstructures for the solar-driven production of carbon monoxide (CO) from carbon dioxide (CO2). As the demand for renewable energy and fuels continues to grow, there is a great deal of interest in solar thermochemical fuel produc...
Article
Titanium dioxide is by far the most used semiconductor material for photocatalytic applications. Still, it is transparent to visible-light. Recently, it has been proved that a type-II band alignment for the rutile − anatase mixture would improve visible-light absorption. In this research paper we thoroughly characterised the real crystalline and am...
Preprint
div>Titanium dioxide is by far the most utilised semiconductor material for photocatalytic applications. Still, it is transparent to visible-light. Recently, it has been proved that a type-II band alignment for the rutile−anatase mixture would improve its visible-light absorption. In this research paper we thoroughly characterised the real crystal...
Article
The soluble amount of Si and Al in biomass fly ash (BFA) and metakaolin (MK) was determined by using a spectrophotometric (colorimetric) method. This low-cost technique is simple to operate, and shows high selectivity and suitable sensitivity. Molybdenum blue and eriochrome cyanine R (ECR) methods were used to quantify, respectively, the SiO2 and A...
Poster
Synthetic dyes, essentially due to their toxic nature, are considered one of the most serious wastewater pollutants and, once deposited in the water lines, become a problem to be removed. 1,2 Adsorption is considered the most effective and simple method for water decontamination. Activated carbons present singular properties, such as their high spe...
Article
This work addresses the solar-driven thermochemical production of CO and O2 from two-step CO2-splitting cycles, using both ceria granules prepared from cork templates (CG) and ceria foams from polyurethane templates (CF). These materials were cycled in a high-temperature indirectly-irradiated solar tubular reactor using a temperature-swing process....
Article
For the first time the feasibility of using an alkaline wastewater coming from the pulp and paper industry as an activator, partially (50 vol.%) replacing commercial sodium hydroxide, in the production of cork-based activated carbons was evaluated. The activated carbons showed the highest value of specific surface area ever reported for cork-based...
Article
Metallic corrosion is an unsolved problem that has been minimized through the application of specialized coatings containing corrosion inhibitors, such as 2-mercaptobenzothiazole (MBT). Recently, engineered nanomaterials (ENM), such as layered double hydroxides (LDH), were used to immobilize or encapsulate those compounds promoting their controlled...
Article
The main purpose of this study was to investigate the potential of suberin (a naturally occurring aromatic–aliphatic polyester ubiquitous to the vegetable realm) as a renewable source of chemicals and, in particular, to assess their physical properties. A comparison between cork and birch suberin fragments obtained by conventional depolymerisation...
Article
Zinc-aluminium layered double hydroxides with nitrate intercalated (Zn(n)Al-NO3, n = Zn/Al) is an intermediate material for the intercalation of different functional molecules used in a wide range of industrial applications. The synthesis of Zn(2)Al-NO3 was investigated considering the time and temperature of hydrothermal treatment. By examining th...
Article
In this work, nanocontainers based on layered double hydroxide (LDH) loaded with two different corrosion inhibitors, namely 2-mercaptobenzothiazole (MBT) and cerium (III) nitrate, were prepared. MBT was intercalated into LDH galleries in anionic form by anion-exchange, while Ce3+ was fixed between polyelectrolyte layers on the surface of LDH-MBT na...

Projects

Project (1)
Project
H2CORK will develop novel CeO2-based Ecoceramics, exploiting the regular, highly porous microstructure of sustainable cork templates, for the innovative renewable production of hydrogen via direct solar thermochemical fuel production (TCFP). Sustainable alternatives to fossil fuels, such as H2, are urgently needed, and must be produced using renewable energy to be truly sustainable. Concentrated solar energy (a focused beam of sunlight) can be used to produce electricity, split water or create synthetic fuels without CO2 emissions. H2 production via direct solar TCFP should be more efficient than electrolysis using solar electricity, and so is an innovative solution to H2 production. What is required is a suitable material for a TCFP catalyst. It is known that CeO2-based materials can be used to split water and produce H2 for TCFP, via a redox cycle that requires heating up to 1400 ºC. What is required is further development and optimisation of such materials to improve efficiency and redox reaction rates, and to enhance their microstructure/surface area. Any materials solutions should also be based on renewable/sustainable resources and methods. This will be achieved by developing innovative CeO2-based catalysts with enhanced regular 3DOM microstructures using naturally occurring cork templates to create Ecoceramics (Environmentally conscious ceramics). These will be a novel form of biomimetic material using a cork template, to make a ceramic with the unique, highly porous cellular microstructure of cork.Cork is a totally sustainable Portuguese resource, the bark being harvested without damaging the tree, which lives on to sequester CO2 for centuries.