A facile and on-site sensing strategy for phenolic compounds based on a novel nanozyme with high polyphenol oxidase-like activity

被引:1
|
作者
Wang, Le [1 ,2 ]
Ruan, Ling [1 ,2 ]
Zhang, Hao [1 ,2 ]
Sun, Yue [1 ,2 ]
Shi, Wenqi [1 ,2 ]
Huang, Hui [3 ]
Li, Yongxin [1 ,2 ]
机构
[1] Jilin Univ, Coll New Energy & Environm, Key Lab Groundwater Resources & Environm, Minist Educ, Changchun 130021, Jilin, Peoples R China
[2] Jilin Univ, Coll New Energy & Environm, Jilin Prov Key Lab Water Resources & Water Environ, Changchun 130021, Peoples R China
[3] Jilin Univ, Coll Food Sci & Engn, Changchun 130025, Peoples R China
基金
中国国家自然科学基金;
关键词
Nanozymes; Laccase; Enzyme activity modulation; Phenolic compounds; Test paper strip; ELECTRON-TRANSFER; LACCASE; IMMOBILIZATION; DESIGN;
D O I
10.1016/j.talanta.2024.126422
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Phenolic compounds (PCs) are diverse in nature and undergo complex migration and transformations in the environment, making it challenging to use techniques such as chromatography and other traditional methods to determine the concentration of PCs by separation, individual monitoring and subsequent addition. To address this issue, a facile and on-site strategy was developed to measure the concentration of PCs using a novel nanozyme with polyphenol oxidase-like activity. First, the nanozyme was designed by coordinating the asymmetric ligand nicotinic acid with copper to mimic the structure of mononuclear and trinuclear copper clusters of natural laccases. Subsequently, by introducing 2-mercaptonicotinic acid to regulate the valence state of copper, the composite nanozyme CuNA10S was obtained with significantly enhanced activity. Interestingly, CuNA10S was shown to have a broad substrate spectrum capable of catalyzing common PCs. Building upon the superior performance of this nanozyme, a method was developed to determine the concentration of PCs. To enable rapid on-site sensing, we designed and prepared CuNA10S-based test strips and developed a tailored smartphone sensing platform. Using paper strip sensors combined with a smartphone sensing platform with RGB streamlined the sensing process, facilitating rapid on-site analysis of PCs within a range of 0-100 mu M. Our method offers a solution for the quick screening of phenolic wastewater at contaminated sites, allowing sensitive and quick monitoring of PCs without the need for standard samples. This significantly simplifies the monitoring procedure compared to more cumbersome large-scale instrumental methods.
引用
收藏
页数:10
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