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A multifunctional nanozyme-based enhanced system for tert-butyl hydroquinone assay by surface-enhanced Raman scattering

文献类型： 外文期刊

作者： Yang, Dezhi 1 ; Li, Qiulan 1 ; Zhang, Qian 2 ; Wang, Yijie 1 ; Li, Hong 1 ; Tammina, Sai Kumar 4 ; Yang, Yaling 1 ;

作者机构： 1.Kunming Univ Sci & Technol, Fac Life Sci & Technol, Kunming 650500, Yunnan, Peoples R China

2.Yunnan Lunyang Technol Co Ltd, Kunming 650032, Yunnan, Peoples R China

3.Yunnan Acad Agr Sci, Inst Agroprod Proc, Kunming 650032, Yunnan, Peoples R China

4.Univ Hyderabad, Sch Phys, Hyderabad 500046, Telangana, India

关键词： Cu,I-doped carbon dots; AuNPs; Nanozyme; Multienzyme-like activity; TBHQ; Raman scattering; SERS

期刊名称：MICROCHIMICA ACTA （ 影响因子：6.408； 五年影响因子：5.888 ）

ISSN： 0026-3672

年卷期： 2022 年 189 卷 1 期

页码：

收录情况： SCI

摘要： An Au-based nanozyme composite (AuNPs/Cu,I) was constructed by using Cu,I-doped carbon dots (Cu,I-CDs) as the reducing agent as well as the nanozyme. Notably, AuNPs/Cu,I nanozyme not only possessed the intrinsic activity of mimicking enzymes of superoxide dismutase, peroxidase, and catalase at different conditions but was also employed as surface-enhanced Raman spectroscopy (SERS) enhancer. The combination of Cu,I-CDs and AuNPs promoted the electron transferability, leading to increased peroxidase-like activity and superoxide-like activity. Compared to the individual Cu,I-CDs and AuNPs nanozyme, the AuNPs/Cu,I composite demonstrated promising peroxidase-like activity by transferring electrons instead of generating OH. Interestingly, the multienzyme-like activity of AuNPs/Cu,I nanozyme could be finely tuned by changing the composition of Cu-0/Cu+ and Au. The tert-butyl hydroquinone (TBHQ) as the substrate could be catalyzed with AuNPs/Cu,I nanozyme to produce red substances, resulting in a significant Raman enhancement effect at the same time, showing good linear range from 0.11 to 10 mg L-1. Overall, the current investigation provides a flexible and controllable way to design multifunctional nanozymes along with the Raman enhancement strategy based on the catalysis of nanozyme.

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