| Title : Ultrasmall Au nanoparticles modified 2D metalloporphyrinic metal-organic framework nanosheets with high peroxidase-like activity for colorimetric detection of organophosphorus pesticides - Yang_2021_Food.Chem_376_131906 |
| Author(s) : Yang H , Sun Z , Qin X , Wu H , Zhang H , Liu G |
| Ref : Food Chem , 376 :131906 , 2021 |
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Abstract :
Ultrasmall Au nanoparticles (UsAuNPs) in the size range of 4.0-7.0 nm was successfully immobilized on the surface of 2D metalloporphyrinic metal-organic framework nanosheets (2D MOF). Firstly, The obtained hybrid nanomaterial, UsAuNPs/2D MOF, was fully characterized by TEM, HRTEM, element mapping images and XPS. Then, the peroxidase-like activity of UsAuNPs/2D MOF was comparatively studied with other hybrid nanozyme to explore the influence of AuNPs size on peroxidase-like activity. Further, UsAuNPs/2D MOF with outstanding peroxidase-like activity was selected to form ternary cascade enzyme reaction with acetylcholinesterase (AChE) and choline oxidase (ChOx). Based on the inhibitory effect of organophosphorus pesticides on AChE, a fast and sensitive colorimetric method was established for trichlorfon detection with the advantages of simple operation, low detection limit (1.7 microM), good linear range (1.7-42.4 microM) and high accuracy (recovery rate of 96.6-105.3%). Finally, this method was applied to visual analysis of trichlorfon concentration in tomatoes, cucumbers and eggplants. |
| PubMedSearch : Yang_2021_Food.Chem_376_131906 |
| PubMedID: 34968912 |
Yang H, Sun Z, Qin X, Wu H, Zhang H, Liu G (2021)
Ultrasmall Au nanoparticles modified 2D metalloporphyrinic metal-organic framework nanosheets with high peroxidase-like activity for colorimetric detection of organophosphorus pesticides
Food Chem
376 :131906
Yang H, Sun Z, Qin X, Wu H, Zhang H, Liu G (2021)
Food Chem
376 :131906