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Selective inhibition toward the enzyme-like activity of 3D porous cerium-doped graphene oxide nanoribbons for highly sensitive and enzyme-free colorimetric detection of pesticides

文献类型： 外文期刊

作者： Tai, Shengmei 1 ; Pan, Qiuli 4 ; Chen, Xiujin 5 ; Peng, Chifang 1 ; Zhang, Cunzheng 6 ; Wang, Zhouping 1 ;

作者机构： 1.Jiangnan Univ, State Key Lab Food Sci & Technol, Lihu Rd 1800, Wuxi 214122, Peoples R China

2.Jiangnan Univ, Sch Food Sci & Technol, Lihu Rd 1800, Wuxi 214122, Peoples R China

3.Jiangnan Univ, Int Joint Lab Food Safety, Lihu Rd 1800, Wuxi 214122, Peoples R China

4.Shandong Inst Food & Drug Control, 2749 Xinluo St, Jinan 250101, Shandong, Peoples R China

5.Henan Univ Sci & Technol, Coll Food & Bioengn, Luoyang 471000, Peoples R China

6.Jiangsu Acad Agr Sci, Key Lab Control Technol & Stand Agroprod Safety &, Key Lab Food Qual & Safety Jiangsu Prov, State Key Lab Breeding Base,Inst Food Safety & Nut, Nanjing 210000, Peoples R China

关键词： Carbon-based nanocomposite; Nanozyme; Diafenthiuron; Carbaryl; Dual enzyme-like activities

期刊名称：SENSORS AND ACTUATORS B-CHEMICAL （ 影响因子：8.4； 五年影响因子：7.2 ）

ISSN：

年卷期： 2023 年 378 卷

页码：

收录情况： SCI

摘要： The development of the detection method based on directly inhibiting nanozyme activity holds great promise for on-site monitoring pesticide contamination of foods, while rarely investigated. In this work, a 3D porous cerium -doped graphene oxide nanoribbons (Ce-GONRs) with dual enzyme-like activities (peroxidase and oxidase) were prepared, which could synergistically catalyze the oxidation of TMB. Diafenthiuron and carbaryl were found to selectively inhibit the dual enzyme-like activities of Ce-GONRs, ascribing to 7C-7C stacking and hydrogen bond between pesticides with nanozymes. Based on this mechanism, the enzyme-free colorimetric detection for dia-fenthiuron and carbaryl were developed. The linear range of diafenthiuron and carbaryl were 10-1500 ng/mL and 2-800 ng/mL, and the detection limits (LOD) of these were 0.57 and 0.23 ng/mL, respectively. The method was successfully applied to detect diafenthiuron and carbaryl in apple and lake water samples. In addition, this work opened up a new way for developing highly sensitive and selective pesticide detection based on the direct inhibition of nanozyme activity through non-metal-sulfur bonding.

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