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Published on: March 21, 2018
Single atom nanozyme sensing platform for simultaneous rapid detection of multiple bisphenols
Mengqiong Zhang1, Guowen Wang2, Jiping Chen3
1School of Light Industry and Chemical Engineering, Dalian Polytechnic University, No. 1 Qinggongyuan, Ganjinzi District, Dalian, 116034, PR China; CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, No. 457 Zhongshan Road, Dalian, 116023, PR China.
A new electrochemical sensor using copper-nitrogen-carbon single-atom nanozymes (SAzymes) enables rapid, simultaneous detection of harmful bisphenol compounds (BPA, BPS, BPAF) in environmental and food samples.
Area of Science:
- Environmental Science
- Analytical Chemistry
- Materials Science
Background:
- Bisphenol compounds (BPA, BPS, BPAF) are widespread pollutants threatening human health and ecosystems.
- Simultaneous detection of multiple bisphenols is challenging due to their similar structures and presence in complex samples.
- Existing methods for bisphenol detection are often slow, expensive, or lack specificity.
Purpose of the Study:
- To develop a rapid, cost-effective electrochemical sensor for simultaneous detection of BPA and its analogues.
- To investigate single-atom nanozymes (SAzymes) as novel platforms for electrochemical sensing.
- To explore the catalytic mechanism and structure-activity relationship of SAzymes in bisphenol detection.
Main Methods:
- Synthesis and characterization of various M-N-C (M = Cu, Mg, Ni, Co, Fe, K) single-atom nanozymes.
- Fabrication of electrochemical sensors using the developed SAzymes.
- Systematic screening and performance evaluation of SAzymes for bisphenol detection.
- Electrocatalytic activity and mechanism studies of the optimal Cu-N-C SAzymes.
Main Results:
- Cu-N-C SAzymes demonstrated superior performance compared to other M-N-C SAzymes.
- The Cu-N-C SAzyme sensor achieved potential-resolved simultaneous detection of BPA, BPS, and BPAF.
- The sensor exhibited high selectivity, sensitivity, and reliability for detecting bisphenols in real samples.
- Mechanistic studies revealed Cu+ and Cu2+ coordinated with nitrogen on graphene as active sites.
Conclusions:
- Cu-N-C SAzymes represent a promising novel platform for sensitive and selective electrochemical detection of multiple bisphenol compounds.
- The developed sensor offers a rapid and efficient solution for monitoring bisphenol pollution in environmental and food safety applications.
- This work provides insights into the design principles of single-atom nanozymes for advanced electrochemical sensing applications.
