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Single iron catalyst with bi-atomic matching site to construct electrochemical chip for on-site inspection of antibiotic chloramphenicol
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DOI：10.1016/j.talanta.2025.127725.png)
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Abstract
En 中文
Chloramphenicol (CAP) as an amide-alcohol antibiotic is extensively used in aquaculture industries and can accumulate in the human body through the food chain and water sources, leading to various diseases. On-site inspection of CAP remains a challenge due to the lack of portable and sensitive sensing platforms. Herein, a bi-atomic matching catalyst that comprises atomic Fe uniformly distributed on an N-doped graphene matrix (AFe-NG) is synthesized. An electrochemical sensor based on A-Fe-NG is constructed for CAP, demonstrating a high sensitivity of 164.2 mu A mu M-1 cm- 2 and a fast response time of 1.2 s, among the best of Fe-based electrochemical CAP sensors. The high performance should be attributed to the high active site density of A-Fe-NG as well as the bi-atomic matching-catalysis mechanism. A portable electrochemical chip based on A-Fe-NG is also built, delivering accurate monitoring of CAP in river water for practical on-site inspection.
Keywords:
Emerging contaminants
Antibiotic chloramphenicol
On-site inspection
Electrochemical chip
Bi-atomic matching-catalysis