2.3 Bioelectroactivity analysis anodophilic biofilms
The bioelectroactivity of the anodophilic biofilms in the SAMFCs at the period of initial (t0), 20th day (t20) and 100th day (t100) was analyzed by cyclic voltammetry (CV) using potentiostatically-controlled three-electrode system, in which the anode served as the working electrode, the air-cathode served as the counter electrode and an Ag/AgCl electrode served as the reference electrode. The CV measurements were controlled by a potentiostat (CHI1040B, Shanghai Chenhua Instrument Co., Ltd, China) and carried out in the potential range from +0.4 V to -0.5V at scanning rate of 1 mV s-1. All the SAMFCs were set at open-circuit condition for 1h before CV implementation.