Soraia Fernandes

Soraia Fernandes
International Iberian Nanotechnology Laboratory · Micro and Nanofabrication Department

PhD student

About

13
Publications
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310
Citations

Publications

Publications (13)
Article
Post-synthetic modification strategy is presented to extend the π-system of covalent organic framework (COF) backbone giving access to boronic ester based pyrene-fused azaacene COFs. Optimized catalyst-free reaction conditions yield COFs post-synthetically modified with up to 33% conversion and corresponding intriguing optical properties. The prese...
Article
Full-text available
Covalent organic frameworks (COFs) have recently shown increasing interest for application in the environmental field, and to this end, the evaluation of their potential toxicity is of importance prior to deploying these materials in the environment. Herein, we report for the first time acute toxicity assessment of a COF using a zebrafish embryotox...
Article
Microcystins (MCs), produced by Microcystis sp, are the most commonly detected cyanotoxins in freshwater, and due to their toxicity, worldwide distribution, and persistence in water, an improvement in the monitoring programs for their early detection and removal from water is necessary. To this end, we investigate the performance of three covalent...
Article
Herein, we demonstrate, for the first time, that covalent organic frameworks (COFs) can be efficient adsorbents for the screening of pharmaceuticals in real water samples, obtaining highly representative data on their occurrence and avoiding the cost of carrying high volume samples and tedious and costly clean-up and preconcentration steps. Of the...
Article
Full-text available
Ibuprofen is one of the most widely used pharmaceuticals, and due to its inefficient removal by conventional wastewater treatment, it can be found in natural surface waters at high concentrations. Recently, we demonstrated that the TpBD-(CF3)2 covalent organic framework (COF) can adsorb ibuprofen from ultrapure water with high efficiency. Here, we...
Article
A magnetic covalent organic framework (COF) is applied for the first time as adsorbent for the extraction of endocrine-disrupting pesticides from water. High adsorption efficiencies were found for lipophilic chlorpyrifos and atrazine, with calculated maximum adsorption capacities of 270 mg g⁻¹ and 54 mg g⁻¹, respectively, outperforming reported ads...
Article
Covalent organic frameworks (COFs) show great promise for application in the capture of contaminants from water due to their high surface area, uniform pore size, and high chemical stability. Recent advances in the synthesis of water‐stable COF derivatives as well as strategies to obtain highly crystalline and porous materials can be exploited to g...
Article
Full-text available
A novel procedure for the preparation of magnetic covalent organic frameworks (COFs) is reported. In situ functionalization of Fe3O4 with dopamine rapidly afforded amino-functionalized magnetic nanoparticles, which after decoration with a COF building block and subsequent COF growth gave access to magnetic composite mTpBD-Me2. The optimized synthes...
Article
Covalent organic frameworks (COFs) are attractive materials receiving increasing interest in the literature due to their crystallinity, large surface area, and pore uniformity. Their properties can be tailored towards specific applications by judicious design of COF building blocks, giving access to tailor‐made pore sizes and surfaces. In this conc...
Article
Full-text available
Capture of pharmaceutical pollutants from water was studied using a novel fluorine‐bearing covalent organic framework TpBD‐(CF3)2, which showed ibuprofen adsorption capacity of 119 mg g‐1 at neutral pH. This value is further enhanced at pH 2, highlighting the potential of this class of materials to serve as adsorbents even under harsh conditions. T...
Article
Phycotoxins, compounds produced by some marine microalgal species, can reach high concentrations in the sea when a massive proliferation occurs, the so-called harmful algal bloom. These compounds are especially dangerous to human health when concentrated in the digestive glands of seafood. In order to generate an early warning system to alert for a...
Article
Full-text available
An approach to significantly enhance the performance of the cost-effective nickel phosphide catalyst for electrochemical water oxidation has been developed via interfacing with Mg oxide-hydroxide. We have synthesized Ni2P nanoparticles anchored on Mg2O(OH)2-like phase supported on carbon paper. During the oxygen evolution reaction, the well-defined...

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