A Solid‐State Electrochemiluminescence Sensor Based on Novel Two‐Dimensional Ti3C2 MXene

Abstract Herein, highly conductive MXene‐Ti 3 C 2 was employed as effective nanocarriers for anchoring electrochemiluminescence (ECL) luminophore of Ru(bpy) 3 2+ (Ti 3 C 2 −Ru). Different from the previous work, the Ti 3 C 2 −Ru composite was achieved in several seconds due to the electrostatic interaction between positively charged Ru(bpy) 3 2+ and negatively charged Ti 3 C 2 . A series of characterizations indicated the successful formation of Ti 3 C 2 −Ru. Then, the solid‐state ECL platform was constructed with the assistance of membrane material, Nafion. The introduction of Ti 3 C 2 with large surface area provided a rapid strategy for capturing luminophore of Ru(bpy) 3 2+ and endowed the solid‐state platform with good electron transfer capacity owing to the super conductivity. Based on the stable loading of Ru(bpy) 3 2+ , the as‐designed platform was successfully used for the analysis of lidocaine and the satisfied analytical results were obtained in human plasma. More importantly, the proposed approach not only enriched the application of Ti 3 C 2 in the sensing field, but also shed light on the label‐free ECL bioanalysis.