Cu-MoO-based nanozyme with enhanced peroxidase like activity for quinolone antibiotics detection.

The abuse of antibiotics has seriously threatened human health and living environment. Nevertheless, the detection of quinolones is currently mainly performed by high-cost and cumbersome means, such as High-Performance Liquid Chromatography (HPLC). Herein, we reported a novel method based on copper-doped MoO nanoparticles (Cu-MoO NPs) with peroxidase-like enhancement activity for the easy preparation, sensitive and rapid visualization of quinolone detection.

Dual-mode fluorescence and colorimetric sensing of sulfide anion in natural water based on near-infrared AgS quantum dots and MnO nanosheets complex.

Near infrared (NIR) emission AgS quantum dots (QDs) are of great value for biochemical sensing with strong anti-interference and low toxicity. Herein, NIR fluorescence AgS QDs were synthesized successfully. Combined with the excellent oxidase-like characteristics of manganese dioxide (MnO) nanosheets, a fluorescence and colorimetric dual-mode sensor for sulfide anion was developed.

Hydrogen peroxide-assisted and histidine-stabilized copper-containing nanozyme for efficient degradation of various organic dyes.

Nanozymes have potential applications in many fields, and a novel copper-containing nanozyme with highly dispersity and uniformity was self-assembled for efficient degradation of various organic dyes in this work. In the nanozyme, histidine was used to coordinate with copper ions, and hydrogen peroxide was prone to Fenton-like reaction to generate hydroxylated copper oxide intermediates. The nanozyme showed good peroxidase-like activity, and also had the ability to catalyze the degradation of various organic dyes efficiently with good storage and recycling ability.