期刊
MICROCHIMICA ACTA
卷 189, 期 1, 页码 -出版社
SPRINGER WIEN
DOI: 10.1007/s00604-021-05135-y
关键词
Cu,I-doped carbon dots; AuNPs; Nanozyme; Multienzyme-like activity; TBHQ; Raman scattering; SERS
资金
- Analysis and Testing Foundation of Kunming University of Science and Technology [2019P20173118001]
- Research on the Key Technology of Vegetable Deep Processing [2019ZG001-4-2]
- Kunming University of Science and Technology high-level talent research platform construction funding [20200097]
- 2019 Kunming University of Science and Technology Graduate Research and International Exchange Project Fund
- Yunnan Lunyang Technology Co., Ltd.
An Au-based nanozyme composite, AuNPs/Cu,I, was constructed using Cu,I-doped carbon dots as the reducing agent and nanozyme. It exhibited versatile enzyme-like activities and served as a surface-enhanced Raman spectroscopy enhancer.
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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