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Shedding light on biocatalysis: photoelectrochemical platforms for solar-driven biotransformation
摘要： Redox biocatalysis has come to the forefront because of its excellent catalytic efficiency, stereoselectivity, and environmental benignity. The green and sustainable biotransformation can be driven by photoelectrochemical (PEC) platforms where redox biocatalysis is coupled with photoelectrocatalysis. The main challenge is how to transfer photoexcited electrons to (or from) the enzyme redox centers for effective biotransformation using solar energy. This review commences with a conceptual discussion of biocatalytic PEC platforms and highlights recent advances in PEC-based biotransformation through cofactor regeneration or direct transfer of charge carriers to (or from) oxidoreductases on enzyme-conjugated electrodes. Finally, we address future perspectives and potential next steps in the vibrant field of biocatalytic photosynthesis.
关键词： photoelectrochemical,cofactor regeneration,biotransformation,redox enzymes,solar-driven,biocatalysis,direct electron transfer
更新于2025-09-23 15:22:29
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Graphene quantum dot electrochemiluminescence increase by bio-generated H <sub/>2</sub> O <sub/>2</sub> and its application in direct biosensing
摘要： In this study, a novel signal-increase electrochemiluminescence (ECL) biosensor has been developed for the detection of glucose based on graphene quantum dot/glucose oxidase (GQD/GOx) on Ti foil. The proposed GQD with excellent ECL ability is synthesized through a green one-step strategy by the electrochemical reduction of graphene oxide quantum dot. Upon the addition of glucose, GOx can catalytically oxidize glucose and the direct electron transfer between the redox centre of GOx and the modified electrode also has been realized, which results in the bio-generated H2O2 for increase in GQD and realizes the direct ECL ECL signal detection of glucose. The signal-increase ECL biosensor enables glucose detection with high sensitivity reaching 5 × 10?6 to 1.5 × 10?3 mol l?1 in a wide linear range from 5 × 10?6 to 1.5 × 10?3 mol l?1. Additionally, the fabrication process of such GQD-based ECL biosensor is also suitable to other biologically produced H2O2 system, suggesting the possible applications in the sensitive detection of other biologically important targets (e.g. small molecules, protein, DNA and so on).
关键词： biosensor,graphene quantum dot,direct electron transfer,glucose oxidase,glucose
更新于2025-09-19 17:13:59