RT info:eu-repo/semantics/article
T1 Graphene quantum dot membranes as fluorescent sensing platforms for Cr (VI) detection
A1 Carrasco, Pedro Mª
A1 García, Ignacio
A1 Yate, Luis
A1 Tena Zaera, Ramón
A1 Cabañero, Germán
A1 Grande, Hans J.
A1 Ruiz Fernández, Virginia
K1 Química analítica
K1 Chemistry, Analytic
K1 Ciencia de materiales
K1 Materials science
AB 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.
PB Elsevier
SN 0008-6223
YR 2016
FD 2016-11
LK https://hdl.handle.net/10259/11061
UL https://hdl.handle.net/10259/11061
LA eng
NO 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.
DS Repositorio Institucional de la Universidad de Burgos
RD 29-abr-2026