Honeycomb‐Like Porous Carbon Embedding CsPbBr ₃ Quantum Dots to Construct Portable Electrochemiluminescent Plastic Chips for the Ultrasensitive Detection of Aflatoxin B1 in Corn Oil

ABSTRACT Aflatoxin B1 (AFB1) contamination in edible oils poses a serious threat to food safety, yet its sensitive and rapid detection is hindered by the high viscosity and electrical insulativity of oil matrices. Herein, we constructed an electrochemiluminescence (ECL) sensing chip for rapid determination of AFB1 in corn oil. Honeycomb‐like porous carbon materials (HPCMs) derived from wood waste were employed to encapsulate CsPbBr 3 quantum dots (CsPbBr 3 QDs). The resulting CsPbBr 3 QDs@HPCMs composites exhibit efficient ECL responses without coreactant participation in 1‐butyl‐3‐methylimidazolium hexafluorophosphate ionic liquid electrolyte. A patterned three‐electrode chip fabricated with carbon ink on a plastic substrate was constructed as a portable ECL device. Coupled with a humic acid‐bonded silica solid‐phase extraction needle, this platform enables ultrasensitive and selective detection of AFB1 in corn oil. This study offers a promising ECL sensing strategy in oil‐phase food safety analysis.