Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1461555 | Ceramics International | 2014 | 6 Pages |
Abstract
A KNbO3 nanoneedles (KNs) based hydrogen peroxide (H2O2) biosensor was first proposed. Perovskite-type KNs can directly catalyze H2O2. The mechanism can be explained by Molecular Orbital Principles, with the formation of σ-bonding between the eg orbital of surface niobium ions and surface adsorbed oxygen-related intermediate species. Direct electron transfer between the Horseradish peroxidase (HRP) and electrode surface was achieved. Co-catalyst system of both HRP and KNbO3 was introduced to the oxidation of H2O2, thus the as-prepared biosensor exhibited high sensitivity (750 μA mM−1 cm−2) and ultrafast response (1–2 s) to H2O2. Therefore, KNs provide a promising material for enzymes assembly and sensing application.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Bin Cai, Minggang Zhao, Ye Wang, Yu Zhou, Hui Cai, Zhizheng Ye, Jingyun Huang,