MOF-based Ag NPs/Co3O4 nanozyme for colorimetric detection of thiophanate-methyl based on analyte-enhanced sensing mechanism
文献类型： 外文期刊
第一作者： Huang, Yali
作者： Huang, Yali;Liang, Ting;Yang, Leiwenxuan;Hu, Gaohua;Zhang, Jianyang;Lu, Chengyin;Chen, Hongping;Ma, Guicen;Zhang, Jianyang;Lu, Chengyin;Chen, Hongping;Ma, Guicen;Huang, Yali;Liang, Ting;Yang, Leiwenxuan;Hu, Gaohua
作者机构：
关键词： MOFs; Nanozyme; Thiophanate-methyl; Analyte-enhanced sensing mechanism; Digital color imaging; Spectrophotometry
期刊名称：MICROCHIMICA ACTA （ 影响因子：5.7； 五年影响因子：5.4 ）
ISSN： 0026-3672
年卷期： 2024 年 191 卷 5 期
页码：
收录情况： SCI
摘要： Silver nanoparticles supported on metal-organic framework (ZIF-67)-derived Co3O4 nanostructures (Ag NPs/Co3O4) were synthesized via a facile in situ reduction strategy. The resulting materials exhibited pH-switchable peroxidase/catalase-like catalytic activity. Ag NP doping greatly enhanced the catalytic activity of Ag NPs/Co3O4 towards 3,3 ',5,5 '-tetramethylbenzidine (TMB) oxidation and H2O2 decomposition which were 59 times (A(652) of oxTMB) and 3 times (A(240) of H2O2) higher than that of ZIF-67, respectively. Excitingly, thiophanate-methyl (TM) further enhanced the peroxidase-like activity of Ag NPs/Co3O4 nanozyme due to the formation of Ag(I) species in TM-Ag NPs/Co3O4 and generation of more radicals resulting from strong interaction between Ag NPs and TM. The TM-Ag NPs/Co3O4 nanozyme exhibited lower K-m and higher V-max values towards H2O2 when compared with Ag NPs/Co3O4 nanozyme. A simple, bioelement-free colorimetric TM detection method based on Ag NPs/Co3O4 nanozyme via analyte-enhanced sensing strategy was successfully established with high sensitivity and selectivity. Our study demonstrated that hybrid noble metal NPs/MOF-based nanozyme can be a class of promising artificial nanozyme in environmental and food safety applications.
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