Effective Reduction of Graphene Oxide via Lactococcus lactis

Abstract

In this study, bacteria Lactococcus lactis was employed as a bioreducing agent for ecofriendly andeconomical production of reduced graphene oxide at room temperature. Characterizations haveshowed that highly reduced graphene oxide was produced in mild conditions. Exfoliation byLactococcus lactis has been succeeded to produce single or few layer reduced graphene oxide.Decrease in ratio of ID/IG from 2.15 to 0.97 calculated from Raman spectrum, decrease and/ordisappearance of characteristic peaks of oxygen functional groups from FTIR, and changes observedin 2 characteristic peak values at XRD spectrum have confirmed the reduction success ofLactococcus lactis. These results have indicated that Lactococcus lactis biomass could be employed asa new reductant to prevent the use of harmful chemicals and harsh conditions for reduced grapheneoxide generation having high stability.