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Design of a Co doped carbon Backbone with self-grown Au nanoparticles via a 'Triple Advantage' Strategy for sensitive
Chong Cai1, Lin Hao2, Zitong Chen1
1State Key Laboratory of New Pharmaceutical Preparations and Excipients, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry and Materials Science, Hebei University 071002 Baoding, PR China.
Abstract:
In this study, a Co doped polyhedral carbon skeleton (Co CN) was prepared by nitrogen carbonization using ZIF-67 as a precursor. The Co CN features a rough surface with excellent electrical conductivity, and the Co atoms exhibit unique catalytic properties. Based on these characteristics, we used Co CN as a carrier to load Au nanoparticles (NPs) onto its surface through the linkage and reduction effects of polyoxometalates (POMs). The resulting Au/POM/Co CN three-component composite nanoparticles exhibited exceptional performance in dopamine detection, showing a reliable linear response within the concentration ranges of 0.4-58 μM and 58-298 μM, with a limit of detection (LOD) as low as 0.198 μM. Additionally, the sensor showed excellent stability, anti-interference properties, and high recovery in experimental tests. This approach provides a novel concept for bimetallic catalysis and expands possibilities for dopamine detection.
