Eliana S. Da Silva

Eliana S. Da Silva
Autonomous University of Barcelona | UAB · Department of Chemistry

PhD in Chemistry

About

22
Publications
4,676
Reads
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439
Citations
Citations since 2016
14 Research Items
376 Citations
2016201720182019202020212022020406080100120
2016201720182019202020212022020406080100120
2016201720182019202020212022020406080100120
2016201720182019202020212022020406080100120
Additional affiliations
November 2014 - March 2022
Universidade Porto
Position
  • Postdoctoral Researcher
May 2009 - July 2014
Université Clermont Auvergne
Position
  • PhD Student
May 2009 - July 2014
University of Coimbra
Position
  • PhD Student

Publications

Publications (22)
Article
Full-text available
The Cover Feature shows a simple, green, and scalable approach to prepare holey and distorted C‐doped g‐C3N4 nanosheets from dicyandiamide and β‐cyclodextrin. This compound plays a crucial role in doping and introducing pores in g‐C3N4, giving rise to a distorted structure with midgap states. These features contribute to enhance visible light absor...
Article
Full-text available
Decatungstate W10O32 4− was efficiently intercalated between the layers of three-dimensionally ordered macroporous Mg2Al-layered double hydroxide. The structural and textural properties of as-prepared intercalated compound were characterized using different solid-state characterization techniques such as X-ray powder diffraction, FTIR and Raman spe...
Article
Full-text available
Few-layer graphene (FLG, 2–7 nm thickness) prepared by catalytic chemical vapour deposition (c-CVD), and bulk graphitic carbon nitride (g-C3N4; GCN) were assembled to develop novel 2D/2D xFLGy/GCN heterostructures. The impact of FLG loading and morphology on the activity of GCN has been evaluated towards H2 generation from water splitting under vis...
Article
Full-text available
The high energy demand we currently face in society and the subsequent large consumption of fossil fuels cause its depletion and increase the pollution levels. The quest for the production of clean energy from renewable and sustainable sources remains open. The conversion of solar energy into hydrogen via the water-splitting process, assisted by ph...
Article
Full-text available
50 days' free access @ https://authors.elsevier.com/c/1c3Ua,L4mbKE2W - Citric acid-modified graphite-like carbon nitride materials (GCN-zCA) were synthetized by thermal co-polymerization of dicyandiamide with different amounts of citric acid (z = between 5 and 25 mg). The resulting materials presented surface porosity, defective polymeric structur...
Article
Full-text available
Undoped metal-free graphene oxide (GO) materials prepared by either a modified Hummers' (GO-H) or a Brodie's (GO-B) method were tested as photocatalysts in aqueous solution for the oxidative conversion of phenol. In the dark, the adsorptive capacity of GO-B towards phenol (~35%) was higher than that of GO-H (~15%). Upon near-UV/Vis irradiation, GO-...
Article
Biodigested coffee processing wastewater (CPW) presents a high organic load and does not meet the limits imposed by legislation (namely in Brazil) for discharge into water bodies. Anaerobic digestion generally cannot provide a satisfactory organic matter reduction in CPW as a significant fraction of recalcitrant compounds still persists in the trea...
Article
Objective: The organic ultraviolet UVB filter 2-ethylhexyl 4-methoxycinnamate (EHMC) was encapsulated in microparticles (MPs) of sodium alginate and co-loaded with Vitamin E (Vit.E) by an extrusion process using an Aerodynamically Assisted Jetting (AAJ) methodology. The aim was to assess the effect of encapsulation concerning UVB filter release fr...
Article
Zinc oxide (ZnO) prepared by chemical vapor deposition was combined with different amounts of carbon nanofibers (CNF) to obtain hybrid materials, which were thoroughly characterized using several techniques. The photocatalytic performance was evaluated towards the photocatalytic synthesis of vanillin (VAD) starting from vanillyl alcohol (VA). The i...
Article
A green, template‐free easy‐to‐implement strategy giving access to holey g‐C₃N₄ nanosheets doped with carbon is described. The protocol involves heating dicyandiamide with β‐cyclodextrin (βCD) prior to polymerization. By this approach, the local symmetry of g‐C3N4 skeleton is broken, thus yielding CxGCN (x corresponds to the initial amount of βCD u...
Article
Full-text available
The plant growth regulator 2-(1-naphthyl) acetamide (NAAm) is susceptible to degradation by sunlight and UV light in aqueous solution. Its inclusion complex with β-cyclodextrin (β-CD) was characterized by absorption and fluorescence spectroscopy and its photodegradation was compared with that of aqueous solutions of NAAm. The complex was formed wit...
Article
The photochemical degradation of 2-(1-naphthyl) acetamide (NAD) in aqueous solution using simulated sunlight excitation as well as UV light within the 254-300 nm range was investigated to obtain an insight into the transformation mechanism that could occur under environmental conditions. Several photoproducts were identified using HPLC/MS/MS techni...
Article
Full-text available
A fast and robust sequential injection analysis (SIA) methodology for routine determination of V(V) in environmental polluted waters is presented. The determination was based on the oxidation of dopamine (DP) by V(V) in acidic medium followed by coupling of the formed intermediary with 4-aminoantipyrine (4AAP) to yield a violet product (ë=565 nm)....
Article
A fast and robust sequential injection analysis (SIA) methodology for routine determination of V(V) in environmental polluted waters is presented. The determination was based on the oxidation of dopamine (DP) by V(V) in acidic medium followed by coupling of the formed intermediary with 4-aminoantipyrine (4AAP) to yield a violet product (λ=565 nm)....
Article
Full-text available
The photosensitised degradation of 4-chlorophenol (4-CP) by iron meso-tetrakis(2,6-dichloro-3-sulfophenyl)porphyrin (FeTDCPPS) has been studied in aerated aqueous solution, and is shown to lead to formation of p-benzoquinone (BQ) and p-hydroquinone (HQ) as main photoproducts. In deaerated solution no p-benzoquinone was formed. The photolysis produc...

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Projects (3)
Project
The search for photocatalysts with the potential to substitute the standard TiO2 has been the focus of intense investigation, mostly driven by the wide bandgap of TiO2 that limits solar-driven applications. Polymeric carbon nitride (g-C3N4) may be regarded as ‘‘doped” graphite in which carbon atoms are regularly substituted by nitrogen, with the layers that constitute this material being held together by weak van der Waals forces. The story of carbon nitride dates back to the 19th century, with the synthesis of a material designated “melon” (linear polymer of connected tri-s-triazine via secondary nitrogen). The tri-s-triazine ring structure and the high degree of condensation give rise to a medium bandgap polymer. The use of polymeric carbon nitride as photocatalyst was only reported very recently in 2008. Its narrow bandgap (~2.7 eV), easy production by thermal decomposition of several low-cost nitrogen-rich precursors, and the possibility of chemical and morphological modification have made this polymeric semiconductor a promising material for photocatalytic applications. Authors with expertise in the use of carbon nitride derivatives in photo-assisted technologies, covering solar fuel production, environmental remediation, and fine chemical synthesis, among others, are cordially invited to submit their manuscripts to this Special Issue of Catalysts. Both full papers and review articles are very welcome. The topics of the Special Issue will cover various aspects of photocatalysis in all of its diversity, as well other areas on the boundaries such as materials science and engineering as well as nanotechnology. More detailed information can be found at: https://www.mdpi.com/journal/catalysts/special_issues/cnp
Project
Metal-free materials are attracting great attention as catalysts in a wide range of reactions for environmental remediation. The role of catalysts is making these processes more sustainable. Material science and nanotechnology are two key issues in this strategy, providing the tools to understand and improve catalytic processes. Moreover, interdisciplinary researchers need to work together to define and share definitive standards on nanomaterial hazards. In this regard, eco-friendly nanoscience must strive to remove environment and human health hazards through materials and process improvement. However, liquid and gas phase reactions are mostly catalysed by metal-based materials since some of them are cheap and suitable for industrial scale production. One of the most promising advance is to reduce the use of metal-based materials owing to their toxicity, scarcity and hazardous wastes. Social issues of sustainable material usage is also related with economic growth for those countries with no territorial accessibility to precious metals. The majority of metal-free catalysts have advantages, such as unique performance, quite economic manufacturing costs, high selectivity, recyclability, and environmental and societal safe. Researchers developing work within design and application of metal-free nanomaterials are cordially invited to submit their manuscripts to this Special Issue of Nanomaterials. The topics of this Special Issue will cover various aspects from the synthesis or improving nanomaterials, until their aplication for clean energy conversion and storage, water remediation, and environmental protection. The participation in this Special Issue is an opportunity to contribute inkey challenges and develop novel research niches in this exciting field. More details at: https://www.mdpi.com/journal/nanomaterials/special_issues/nano_environ_energy
Project
Synthesis and characterization of visible light nanostructured photocatalyts for production of solar fuels.