Details

Autor(en) / Beteiligte

• Yang, Qinqin
• Cui, Xipeng
• Qin, Ying
• Lei, Tiantian
• He, Yu
• Song, Gongwu

Titel

Cu nanoclusters decorated Ti3C2 nanosheets composite with tetraenzyme mimic activities and the application for smartphone-assisted detection of hypoxanthine

Ist Teil von

• Analytica chimica acta, 2022-11, Vol.1232, p.340494-340494, Article 340494

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2022

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• MXene-based nanozymes have increased research enthusiasm in the field of food safety and environment monitoring. Herein, the Cu NCs/Ti3C2 NSs nanocomposites were prepared by modifying copper nanoclusters (Cu NCs) on the surface of Ti3C2 nanosheets (NSs) with a simple two-step method. The Cu NCs/Ti3C2 NSs nanocomposites had outstanding tetraenzyme mimic activities, i.e. peroxidase (POD)-mimics, catalase (CAT)-mimics, ascorbic acid oxidase (AAO)-mimics and superoxide dismutase (SOD)-mimics. Modification of Cu NCs on Ti3C2 NSs can enhance tetraenzyme mimic activities because of the synergistic catalytic effect between Cu NCs and Ti3C2 NSs. The catalytic mechanism and steady-state kinetics of Cu NCs/Ti3C2 NSs were also investigated. Based on the POD-mimic activity of Cu NCs/Ti3C2 NSs, a simple and rapid colorimetric method was established for the on-site detection of hypoxanthine (Hx), with the linear range of 5–200 μM and limit of detection (LOD) was 0.25 μM. The visible color change with the increase of Hx concentration can be recognized by a smartphone APP to transfer the red (R), green (G) and blue (B) value for the quantitative analysis of Hx, with the linear range of 10–200 μM, which provided a convenient method for the real-time detection of Hx. This work not only provides a significant route to fabricate nanocomposite with outstanding tetraenzyme mimic activities but also offers a low-cost and rapid method for monitoring the freshness of aquatic products. We prepared Cu NCs/Ti3C2 NSs nanocomposites with peroxidase (POD), catalase (CAT), ascorbic acid oxidase (AAO) and superoxide dismutase (SOD)-mimics activities and used digital image colorimetry to rapidly detect hypoxanthine. [Display omitted] •Cu NCs/Ti3C2 NSs with tetraenzyme mimic activities were synthesized.•The synergistic effect of Cu NCs and Ti3C2 NSs improved the catalytic activity.•A smartphone-assisted method was established for the on-site detection of Hx.