Abstract
ZnO nanoparticles (NPs) were synthesized via a green biochemical method using Corymbia citriodora leaf extract as a reducing and stabilizing agent. The biosynthesized ZnO NPs were characterized by SEM and XRD. An electrochemical H2O2 biosensor was fabricated by modification of a glassy carbon electrode using our proposed ZnO NPs. The electrochemical sensor showed excellent detection performance towards trace amounts of H2O2, demonstrating that it could potentially be used in clinical applications.
Highlights
H2O2 is a substance that can be decomposed to produce free radicals, which may cause great harm to human health
The average crystallite size of the biosynthesized ZnO NPs was calculated to 21.7 nm using the Debye– Scherrer equation
We proposed an electrochemical H2O2 sensor based on green biosynthesized ZnO NPs using Corymbia citriodora leaf extract as a reducing and stabilizing agent
Summary
H2O2 is a substance that can be decomposed to produce free radicals, which may cause great harm to human health. We successfully synthesized ZnO NPs using Corymbia citriodora leaf extract and tested the particles’ photocatalytic activity (Zheng et al, 2015). Synthesized ZnO NPs were prepared using a similar method in which ammonium hydroxide was used instead of the Corymbia citriodora leaf extract.
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