Rapid detection of nitrite and in food based on multiple simulated enzyme activities of FeO-ZnO-MnO nanocomposites.

Food safety has emerged as a paramount concern in global health, prompting innovative approaches to ensure the safety of people's sustenance. In this study, a novel strategy was devised to fabricate FeO-ZnO-MnO hybrid nanobiocatalysts, which exhibited remarkable enzymatic activity surpassing that of Horseradish peroxidase (HRP) catalysis. It demonstrated exceptional proficiency in decomposing 3,3',5,5'-tetramethylbenzidine (TMB) without the need for harsh reaction conditions or the aid of HO.

A multichromatic colorimetric detection method for based on FeO-Zn-Mn nanoenzyme and dual substrates.

The FeO-Zn-Mn nanomimetic enzyme demonstrates significant importance in dual-substrate colorimetric detection for , owing to its enhanced sensitivity, selectivity, and rapid detection capabilities. Additionally, it offers cost-effectiveness, portability, and the potential for multiplex detection. This innovative approach holds promise for improving the monitoring and control of infections, thereby contributing to advancements in public health and food safety.

Rapid and sensitive determination of ascorbic acid based on label-free silver triangular nanoplates.

In this study, a new method for the detection of ascorbic acid (AA) was proposed. It was based on the protective effect of AA on silver triangular nanoplates (Ag TNPs) against Cl induced etching reactions. Cl can attack the corners of Ag TNPs and etch them, causing a morphological shift from triangular nanoplates to nanodiscs.

Multicolor colorimetric visual detection of Staphylococcus aureus based on FeO-Ag-MnO composites nano-oxidative mimetic enzyme.

Novel FeO-Ag-MnO composites were successfully synthesized. It was noteworthy that the obtained FeO-Ag-MnO composites were found to possess three types of enzyme-mimicking activities, including peroxidase-like, catalase-like and oxidase-like activities. Taking advantage of the oxidase properties of FeO-Ag-MnO, the direct oxidation of TMB could be catalyzed to generate blue oxidation products without HO.