Browsing by Author "de Lima-Neto, Pedro"
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- (Bio)Sensing Strategies Based on Ionic Liquid-Functionalized Carbon Nanocomposites for Pharmaceuticals: Towards Greener Electrochemical ToolsPublication . Torrinha, Álvaro; Oliveira, Thiago M. B. F.; Ribeiro, Francisco W. P.; de Lima-Neto, Pedro; Correia, Adriana N.; Morais, SimoneThe interaction of carbon-based nanomaterials and ionic liquids (ILs) has been thoroughly exploited for diverse electroanalytical solutions since the first report in 2003. This combination, either through covalent or non-covalent functionalization, takes advantage of the unique characteristics inherent to each material, resulting in synergistic effects that are conferred to the electrochemical (bio)sensing system. From one side, carbon nanomaterials offer miniaturization capacity with enhanced electron transfer rates at a reduced cost, whereas from the other side, ILs contribute as ecological dispersing media for the nanostructures, improving conductivity and biocompatibility. The present review focuses on the use of this interesting type of nanocomposites for the development of (bio)sensors specifically for pharmaceutical detection, with emphasis on the analytical (bio)sensing features. The literature search displayed the conjugation of more than 20 different ILs and several carbon nanomaterials (MWCNT, SWCNT, graphene, carbon nanofibers, fullerene, and carbon quantum dots, among others) that were applied for a large set (about 60) of pharmaceutical compounds. This great variability causes a straightforward comparison between sensors to be a challenging task. Undoubtedly, electrochemical sensors based on the conjugation of carbon nanomaterials with ILs can potentially be established as sustainable analytical tools and viable alternatives to more traditional methods, especially concerning in situ environmental analysis
- Removal and sensing of emerging pollutants released from (micro)plastic degradation: Strategies based on boron-doped diamond electrodesPublication . Oliveira, Thiago M.B.F.; Ribeiro, Francisco W.P.; Morais, Simone; de Lima-Neto, Pedro; Correia, Adriana N.The negative impacts of microplastics on the environment and human health cannot be unnoticed. Several classes of emerging pollutants with endocrine-disrupting properties such as bisphenol A and its analogs, phthalates, among others, have been reported to migrate out of plastics entering the aquatic environment. Thus, this review aims to draw attention to the significant potential of the boron-doped diamond electrode to contribute to the implementation of mitigation actions for microplastic pollutants. The latest studies in the two main fields of the use of the boron-doped diamond electrode, that is, treatment of wastewater by electrochemical oxidation and a as sensor for pollutants monitoring, are herein reviewed and their main findings highlighted.
- Trends and frontiers in graphene-based (bio)sensors for pesticides electroanalysisPublication . Sousa, Camila P.; Ribeiro, Francisco W.P.; Oliveira, Thiago M.B.F.; Correia, Adriana N.; de Lima-Neto, Pedro; Morais, SimoneUndoubtedly, carbonaceous (nano)materials are the most widely used feedstock to obtain improvements in electrochemical devices, but graphene has attracted strong scientific and technological interest due to its exceptional physicochemical properties. Graphene-sheets functionalization, integration with metallic nanoparticles, organic and inorganic molecules and/or groups, synthesis method, and chemical or thermal reduction of graphite oxide can greatly influence the performance of the devices. In general, graphene-based (bio)sensors overcome the conventional ones in terms of sensitivity, electrocatalytic activity, potential window, and charge-transfer processes. They can be a key tool for the miniaturization and development of fast, sensitive, versatile, environment-friendly, and in situ electroanalytical methods for pesticides, in particular for carbamates, organophosphates, organochlorines, benzimidazole, and neonicotinoids, among others. The constant advances in the application of these devices are unquestionable, but there are still questions about the interfacial redox phenomena that are not fully understood and deserve to be investigated. This chapter describes the exciting progress and challenges in this field, emphasizing the main scientific findings.