Phenothiazine derivative-accelerated microbial extracellular electron transfer in bioelectrochemical system.

ABSTRACT: In bioelectrochemical system (BES) the extracellular electron transfer (EET) from bacteria to anode electrode is recognized as a crucial step that governs the anodic reaction efficiency. Here, we report a novel approach to substantially enhance the microbial EET by immobilization of a small active phenothiazine derivative, methylene blue, on electrode surface. A comparison of the currents generated by Shewanella oneidensis MR-1 and its mutants as well as the electrochemical analytical results reveal that the accelerated EET was attributed to enhanced interactions between the bacterial outer-membrane cytochromes and the immobilized methylene blue. A further investigation into the process using in situ Raman spectro-electrochemical method coupled with density functional theory calculations d

SUBMITTER: Liu XW 

PROVIDER: S-EPMC3619140 | biostudies-literature | 2013

REPOSITORIES: biostudies-literature