Abstract
ZrO2 coated highly porous biomass carbon nanocomposites (ZrO2@KHPC) were synthesized by calcination. The ZrO2 was derived from an amino-functionalized metal-organic framework and the porous biomass carbon material was derived from waste sunflower products. A selective electrochemical sensor was fabricated by modifying glass carbon electrodes (GCE) using ZrO2@KHPC to determine rutin. KHPC with a porous structure exhibited strong adsorption, high specific surface area, and superior electrical conductivity, whereas ZrO2 nanoparticles with an octahedral crystal structure and high electrocatalytic activity promote the specific recognition of rutin. The ZrO2@KHPC/GCE sensor demonstrated exceptional performance with a low detection limit of 0.008 µM and a sensitivity of 28.45 µA·µΜ−1·cm−2 from 0.01 to 40 µM. This excellent performance is attributed to the synergistic combination of ZrO2 and KHPC. In addition, the electrochemical sensor demonstrated suitable stability, good selectivity, high reproducibility, and satisfactory recovery for practical analysis.
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