Highly stable magnetite modified with chitosan, ferrocene and enzyme for application in magneto-switchable bioelectrocatalysis

Journal of the Brazilian Chemical Society

Antonio F. A. A. Melo²  Roberto A. S. Luz¹  Rodrigo M. Iost²  Iseli L. Nantes¹  Frank N. Crespilho² 

[1] ,Universidade de São Paulo Instituto de Química de São Carlos São Carlos SP ,Brazil

关键词: magneto-switchable bioelectrocatalysis;    magnetite;    chitosan;    ferrocene;    glucose oxidase;   

DOI  :  10.5935/0103-5053.20130037

来源: SciELO

【 摘 要 】

Magnetic fields have been used in Bioelectrochemistry to carry enzymes or redox mediators immobilized on magnetite (Fe3O4) to the electrodes surface, providing a switchable control of faradaic current from biocatalysis. In this work, it is reported an advance in the magnetic control of bioelectrochemical reactions, by construction of a system containing simultaneously a magnetic particle (for controlled driving), an enzyme (for biocatalysis) and a redox mediator (for mediation of electron transfer). The advance was attained by synthesis of a new material (Fe3O4-Chi-Fc/GOx) that consists of Fe3O4 particles modified with insoluble ferrocene (Fc) and chitosan (Chi) cross-linked with glucose oxidase (GOx). When this material was used in electrochemical studies, an increase of 70% was observed in the catalytic current of glucose oxidation when 0.24 T was applied perpendicularly to electrode plane. This is the first time that a control of the bioelectrocatalytic process was achieved using enzyme, mediator and magnetite in a unique system switched by a magnetic field.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License