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| Pàgina inicial > Articles > Articles publicats > Graphene nanobeacons with high-affinity pockets for combined, selective, and effective decontamination and reagentless detection of heavy metals |
(Palacký University Olomouc. Department of Physical Chemistry) (Institut Català de Nanociència i Nanotecnologia) (Institut Català de Nanociència i Nanotecnologia) (Institut Català de Nanociència i Nanotecnologia) (VŠB-Technical University of Ostrava. Nanotechnology Centre) (Institut Català de Nanociència i Nanotecnologia) (VŠB-Technical University of Ostrava. Nanotechnology Centre) (VŠB-Technical University of Ostrava. IT4Innovations)
| Data: | 2022 |
| Resum: | Access to clean water for drinking, sanitation, and irrigation is a major sustainable development goal of the United Nations. Thus, technologies for cleaning water and quality-monitoring must become widely accessible and of low-cost, while being effective, selective, sustainable, and eco-friendly. To meet this challenge, hetero-bifunctional nanographene fluorescent beacons with high-affinity pockets for heavy metals are developed, offering top-rated and selective adsorption for cadmium and lead, reaching 870 and 450 mg g, respectively. The heterobifunctional and multidentate pockets also operate as selective gates for fluorescence signal regulation with sub-nanomolar sensitivity (0. 1 and 0. 2 nm for Pb and Cd, respectively), due to binding affinities as low as those of antigen-antibody interactions. Importantly, the acid-proof nanographenes can be fully regenerated and reused. Their broad visible-light absorption offers an additional mode for water-quality monitoring based on ultra-low cost and user-friendly reagentless paper detection with the naked-eye at a limit of detection of 1 and 10 ppb for Pb and Cd ions, respectively. This work shows that photoactive nanomaterials, densely-functionalized with strong, yet selective ligands for targeted contaminants, can successfully combine features such as excellent adsorption, reusability, and sensing capabilities, in a way to extend the material's applicability, its life-cycle, and value-for-money. |
| Ajuts: | European Commission 881603 European Commission 683024 Agencia Estatal de Investigación MAT2017-87202-P Ministerio de Economía y Competitividad SEV-2017-0706 |
| Nota: | Altres ajuts: ICN2 is funded by CERCA programme, Generalitat de Catalunya. |
| Drets: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.  |
| Llengua: | Anglès |
| Document: | Article ; recerca ; Versió publicada |
| Matèria: | Carboxylation ; Heavy metals ; Nitrogen-doped graphene acid ; Paper-based sensors ; Sensing ; Sorption |
| Publicat a: | Small, Vol. 18, issue 33 (Aug. 2022) , art. 2201003, ISSN 1613-6829 |
