Photoelectrochemically-assisted biofuel cell constructed by redox complex and g-C3N4 coated MWCNT bioanode

被引:26
作者
Cakiroglu, Bekir [1 ,2 ]
Chauvin, Jerome [1 ]
Le Goff, Alan [1 ,4 ]
Gorgy, Karine [1 ]
Ozacar, Mahmut [2 ,3 ]
Holzinger, Michael [1 ,4 ]
机构
[1] Univ Grenoble Alpes, DCM UMR 5250, F-38000 Grenoble, France
[2] Sakarya Univ, Biomed Magnet & Semicond Mat Res Ctr BIMAS RC, TR-54187 Sakarya, Turkey
[3] Sakarya Univ, Sci & Arts Fac, Dept Chem, TR-54187 Sakarya, Turkey
[4] CNRS, DCM UMR 5250, F-38000 Grenoble, France
关键词
Photoelectrochemical biofuel cell; Glucose bioelectrocatalysis; FADGDH; BOx; Ruthenium complexes; Photoelectrochemical biosensor; DEPENDENT GLUCOSE-DEHYDROGENASE; PHOTOINDUCED ELECTRON-TRANSFER; CARBON NANOTUBE; BUCKYPAPER BIOELECTRODES; BILIRUBIN OXIDASE; LIGHT; POLYMER; DRIVEN; 1,10-PHENANTHROLINE-5,6-DIONE; PERFORMANCE;
D O I
10.1016/j.bios.2020.112601
中图分类号
Q6 [生物物理学];
学科分类号
071011 ;
摘要
Herein, we report a membraneless glucose and air photoelectrochemical biofuel cell (PBFC) with a visible light assisted photobioanode. Flavin adenine dinucleotide dependent glucose dehydrogenase (FADGDH) was immobilized on the combined photobioanode for the visible light assisted glucose oxidation (GCE vertical bar MWCNT vertical bar g-C3N4 vertical bar Ru-complex vertical bar FADGDH) with a quinone mediated electron transfer. Bilirubine oxidase (BOx) immobilized on MWCNT coated GCE (GCE vertical bar BOx) was used as the cathode with direct electron transfer (DET). An improvement of biocatalytic oxidation current was observed by 6.2% due in part to the light-driven electron-transfer. The large oxidation currents are probably owing to the good contacting of the immobilized enzymes with the electrode material and the utilization of light assisted process. Under the visible light, the photobioanode shows an anodic photocurrent of 1.95 mu A cm(2) at attractively low potentials viz. -0.4 vs Ag/AgCl. The lower-lying conduction band of g-C3N4 as compared to Ru-complexes decreases the rate of hole and electron recombination and enhances the charge transportation. The bioanode shows maximum current density for glucose oxidation up to 6.78 mu A cm(-2) at 0.2 V vs Ag/AgCl at pH:7. The performance of three promising Ru-complexes differing in chemical and redox properties were compared as electron mediators for FADGDH. Upon illumination, the PBFC delivered a maximum power density of 28.5 +/- 0.10 mu W cm(-2) at a cell voltage of +0.4 V with an open circuit voltage of 0.64 V.
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页数:8
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