Journal
BIOSENSORS & BIOELECTRONICS
Volume 210, Issue -, Pages -Publisher
ELSEVIER ADVANCED TECHNOLOGY
DOI: 10.1016/j.bios.2022.114294
Keywords
Single-atom nanozymes; Peroxidase; Heteroatom doping; Biosensing; p-Phenylenediamine
Categories
Funding
- National Natural Science Foundation of China [21777130, 41807210]
- Natural Science Foundation of Sichuan Province of China [2019YJ0522, 2018JY0184]
- Meri-tocracy Research Funds of China West Normal University [17YC038]
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In this study, highly active single-atom nanozymes (SAzymes) were designed and realized for the first time, and a novel colorimetric method for detecting PPD in hair dyes was developed based on their peroxidase-like activity.
Single-atom catalysts with atomically dispersed M-Nx active sites have been widely used as nanozymes for colorimetric sensing due to their similar structure to natural enzymes, but they are still limited by their biological activity. Herein, controllable synthesis of B-doped Zn-N-C (ZnBNC) single-atom nanozymes (SAzymes) was designed and realized for the first time as a potent peroxidase mimetic. Based on the peroxidase-like activity of ZnBNC SAzymes, a novel colorimetric method was developed for the highly sensitive and selective detection of pphenylenediamine (PPD) with a wide response range (0.3-10 mu M) and a low detection limit (0.1 mu M), which can be used as an alternative method for the detection of PPD in hair dyes and dyed hair samples.
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