|
|||||
|
|
Glassy carbon electrode modified with poly-Neutral Red for photoelectrocatalytic oxidation of NADH |
|
| Authors: | Didem Giray Dilgin Delia Gligor H. İsmet Gökçel Zekerya Dursun Yusuf Dilgin |
| Affiliation: | 1. Biga Vocational College, ?anakkale Onsekiz Mart University, TR-17200, Biga ?anakkale, Turkey 2. Department of Chemistry, Ege University, Science Faculty, 35100, Bornova/?zmir, Turkey 3. Department of Environmental Physics, Chemistry and Engineering, Babes-Bolyai University, 30 Fantanele St., 400294, Cluj-Napoca, Romania 4. Department of Chemistry, Science & Art Faculty, ?anakkale Onsekiz Mart University, 17100, ?anakkale, Turkey |
| Abstract: | A new approach is described for the photoelectrocatalytic oxidation of Reduced ß-Nicotinamide Adenine Dinucleotide (NADH). It is based on a glassy carbon electrode (GCE) modified with a film of poly-Neutral Red (poly-NR) that is obtained by electropolymerization. Electrochemical measurements revealed that the modified electrode displays electrocatalytic and photo-electrocatalytic activity towards oxidation of NADH. If irradiated with a 250-W halogen lamp, the electrode yields a strongly increased electrocatalytic current compared to the current without irradiation. Amperometric and photo-amperometric detection of NADH was performed at +150 mV vs. Ag/AgCl/KClsat and the currents obtained are linearly related to the concentration of NADH. Linear calibration plots are obtained in the concentration range from 1.0 μM to 1.0 mM for both methods. However, the slope of the current-NADH concentration curve of the photo-electrocatalytic procedure was 2-times better than that obtained without irradiation. A poly-Neutral Red modified glassy carbon electrode (poly-NR/GCE) was prepared by electropolymerization process. This modified electrode displays electrocatalytic and also photoelectrocatalytic activity towards oxidation of NADH. Compared with electrocatalytic oxidation of NADH, the current response was increased about 2.0 times in the photoelectrocatalytic oxidation process. |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ | |