A novel fluoride-selective electrode based on metalloporphyrin grafted-grapheneoxide

作者：Poursaberi T; Ganjali M R^*; Hassanisadi M

来源：Talanta, 2012, 101: 128-134.

DOI：10.1016/j.talanta.2012.08.039

• Graphene oxide
• Fluoride
• Selective electrode
• Metalloporphyrin
• Potentiometry

In this work, the unique properties of graphene oxide were combined with the anion selectivity of metalloporphyrin to fabricate a novel fluoride-selective sensor. The electrode made of 27% PVC, 54% NPOE, 4% NaTPB and 15% NbTPP-GO was found to show the most favorable behavior. The sensor shows a Nernstian response (58.3 mV decade-1) in the concentration window of 5.0 x 10(-1) - 5.0 x 10(-7) mol L-1 with detection limit of 8.0 x 10(-87) mol L-1. The response of the sensor was found to be stable in the pH range of 3.0-7.0 and the metalloporphyrin grafted-GO based F- sensors displayed very good selectivity with respect to a number of anions. The proposed sensor displays a long life time (more than 12 weeks) with a short response time of about 20 s.

• 出版日期2012-11-15