Abstract
Abstract Laccase was immobilized on a novel conductive polyvinyl alcohol (PVA)/chitosan (CS)/multi-walled carbon nanotubes (MWNTs) composite nanofibrous membrane. Its stabilities and catalytic activity for diclofenac degradation were comprehensively investigated. Laccase was covalently immobilized on the surface of PVA/CS/MWNTs nanofibrous membranes with an average fiber diameter of 100–200 nm. Both enzyme loading and activity retention of the immobilized laccase were found to be significant higher on the nanofibrous membranes with MWNTs (907 mg laccase/g membrane, 76.7% of free laccase) than those without (862 mg laccase/g membrane, 63.5% of free laccase). Immobilized laccase on the PVA/CS/MWNTs nanofibrous membranes exhibited high stabilities, reuse capabilities and removal efficiency for diclofenac. Cyclic voltammetry measurements demonstrated that MWNTs enhanced the electrochemical capacitance of the nanofibrous membrane. It suggests carbon nanotubes may play a significant role on the enhancement of laccase activity immobilized on the nanofibers by improving electron transfer between the enzyme and substrate molecules.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
