Construction of Hierarchical Star Like Morphology of NiO Nanosheets Having Superb Peroxidase Mimetic Properties for Effective Colorimetric H2O2 Sensing.

Abstract

In this work, we have developed a novel and sensitive colorimetric sensor by the constructions of hierarchical star-like structure of exfoliated NiO called as NiO-ɤ catalyst with strong peroxidase mimetic properties. The as prepared sensor predicted highest sensing response with wider and linear range of 0.001-0.900 µM, having limit of detection (LOD) and limit of quantification (LOQ) values of 0.09 ± 0.05 nM and 0.63 ± 0.05 nM. In addition, it also manifests astonishing selectivity, ample stability, better reproducibility and excellent practicality. Thus, as a result we concluded that this method is simple, robust, color stable and reliable, and hence provides an effective colorimetric bio-sensing platform for biomedical-diagnosis.