2026-04-29T16:00:07Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/110612025-11-15T01:05:34Zcom_10259_5822com_10259_5086com_10259_2604col_10259_5823

Carrasco, Pedro Mª 9f0226d1-c48e-47a6-93c6-8f798ef8ee45 600 García, Ignacio f9b755c6-c45c-426a-877b-6cfa13f19646 600 Yate, Luis 43beea38-b3c9-4a01-a4a8-8fd12fc6ee15 600 Tena Zaera, Ramón db389d5e-e233-4c05-bb02-1599d695bd66 Cabañero, Germán 11f17b6d-9a71-41e2-9707-9270bcbedf49 600 Grande, Hans J. c8ff9d1e-6b7b-4b80-ac09-068a3faaa23f 600 Ruiz Fernández, Virginia 858 600 0000-0002-0466-0634 2025-11-14T11:21:21Z 2025-11-14T11:21:21Z 2016-11 0008-6223 https://hdl.handle.net/10259/11061 10.1016/j.carbon.2016.08.038 A simple and versatile method to produce filtration membranes with graphene quantum dots (GQD) and their excellent performance as turn-off fluorescence sensing platforms for Cr (VI) detection in water is presented. Suitably functionalized GQD were immobilized on various types of membranes (nylon, cellulose and glass fiber) and the resulting GQD-modified membranes exhibited the characteristic fluorescence fingerprint of the GQD probes. The membrane fluorescence was quenched by highly toxic Cr (VI) ions due to selective coordination to GQD functional groups. The analytical performance of membranes was comparable to that of dispersed GQD fluorescent probes, displaying a fast and linear response to Cr (VI) concentration in the 1–500 μM range, a low detection limit of 190 nM, high sensitivity, reproducibility and selectivity. Moreover, the membranes can be regenerated by simple washing with deionized water and reused, preserving their good sensing response after several Cr (VI) detection-washing cycles. Membrane sensing performance was very stable after being immersed in water for several days and filtering water through them. Financial support from the Basque Government under the ELKARTEK Program (ACTIMAT project, grant number: KK-2015/00094) and Diputación Foral de Gipuzkoa (BIOGRAF project, grant number: 32/15) is gratefully acknowledged. We wish to thank Dr. Graciela Martinez Paredes for fruitful discussions. application/pdf eng Elsevier Carbon. 2016, V. 109, p. 658-665 https://doi.org/10.1016/j.carbon.2016.08.038 Attribution-NonCommercial-NoDerivatives 4.0 Internacional http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess Química analítica Ciencia de materiales Chemistry, Analytic Materials science Graphene quantum dot membranes as fluorescent sensing platforms for Cr (VI) detection info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Carbon 109 658 665 THUMBNAIL Carrasco-Carbon_2016.pdf.jpg Carrasco-Carbon_2016.pdf.jpg IM Thumbnail image/jpeg 3952 https://riubu.ubu.es/bitstream/10259/11061/4/Carrasco-Carbon_2016.pdf.jpg 4d73671e203dcaa56c395a458ca17415 MD5 4 LICENSE license.txt license.txt text/plain; charset=utf-8 999 https://riubu.ubu.es/bitstream/10259/11061/3/license.txt b295bcbce42e2caabeb0c623d3860c06 MD5 3 CC-LICENSE license_rdf license_rdf application/rdf+xml; charset=utf-8 805 https://riubu.ubu.es/bitstream/10259/11061/2/license_rdf 4460e5956bc1d1639be9ae6146a50347 MD5 2 ORIGINAL Carrasco-Carbon_2016.pdf Carrasco-Carbon_2016.pdf application/pdf 1257209 https://riubu.ubu.es/bitstream/10259/11061/1/Carrasco-Carbon_2016.pdf 321a718ae452d4019664b29e66171215 MD5 1 10259/11061 oai:riubu.ubu.es:10259/11061 2025-11-15 02:05:34.116 Repositorio Institucional de la Universidad de Burgos bubrep@ubu.es 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