A sensitive and reliable rutin electrochemical sensor based on palladium phthalocyanine-MWCNTs-Nafion nanocomposite

Fabrication of multicomponent nanocomposites as electrode-modified materials is an effective strategy to design highly active electrochemical sensors. Here, we present a facile strategy to fabricate the palladium phthalocyanine-multiwalled carbon nanotube (PdPc-MWCNTs) nanocomposite for the sensitive detection of rutin. Results showed that the prepared nanocomposites exhibited excellent electrocatalytic activity toward rutin due to the synergetic effects of PdPc and MWCNTs (excellent electric conductivity and catalytic activity) and the homogeneous dispersibility of Nafion. Under the optimized conditions, the developed sensor exhibited a linear response range from 0.10 to 51 μM for rutin with a low detectable limit of 75 nM and a fast response less than 3.0 s. The proposed method might offer a possibility for electrochemical analysis of rutin in Chinese medical analysis or serum monitoring owing to its low cost, simplicity, high sensitivity, good stability, and few interferences against common coexisting ions in real samples.