胆碱氧化酶
纳米材料
化学
纳米颗粒
高分辨率透射电子显微镜
三元运算
检出限
线性范围
过氧化物酶
乙酰胆碱酯酶
核化学
组合化学
色谱法
纳米技术
材料科学
有机化学
酶
透射电子显微镜
计算机科学
程序设计语言
作者
Huanyu Yang,Zhiping Sun,Xinguang Qin,Hongyuan Wu,Haizhi Zhang,Gang Liu
出处
期刊:Food Chemistry
[Elsevier]
日期:2022-05-01
卷期号:376: 131906-131906
被引量:30
标识
DOI:10.1016/j.foodchem.2021.131906
摘要
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 μM), good linear range (1.7–42.4 μM) 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.
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