Electrochemically active biofilm mediated syntheses of nanoparticles and nanocomposites and their applications
Mohammad Mansoob Khan, Jintae Lee, Moo Hwan Cho
Nanobiotechnology Lab, School of Chemical Engineering, Yeungnam University, Gyeongsan, Gyeonsangbukdo 712-749, South Korea
Microorganisms naturally form biofilm on solid surface. Till now biofilm is considered as detrimental for human health and industrial products. However, recent researches suggest that biofilm has certain properties that can be utilized to catalyze and control the electrochemical reactions in the field of bio- energy, bio-remediation, chemical/ electrochemical synthesis and bio-corrosion. These properties could lead to a wide range of new products and processes. Among the biofilms, electrochemically active biofilms (EABs) generated by electroactive microorganisms have received prodigious attention due to their widespread applications in microbial fuel cell (MFC). Recently, our group has established that EAB can be successfully employed for the synthesis of silver nanoparticles (AgNPs), cys-silver nanoparticles (Cys-AgNPs), gold nanoparticles (AuNPs) and Au@TiO2 nanocomposite. These findings show that EAB is a fascinating tool for the synthesis of metal nanoparticles and nanocomposites. The as-synthesized nanoparticles and nanocomposites were utilized for antimicrobial activity, dye degradation, photocatalytic and other catalytic reactions. The EAB mediated syntheses of metal and metal-metal oxide nanocomposites pave a new avenue for greener synthesis of nanoparticles and nanocomposites with high efficiency and rapidity.
Keywords: Electrochemically active biofilm, Ag nanoparticles, Cys-Ag nanoparticles, Gold nanoparticles, Au@TiO2 nanocomposites
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