An effective electrochemical detection of chlorogenic acid in real samples: Flower-like ZnO surface covered on PEDOT:PSS composites modified glassy carbon electrode

Zinc oxide (ZnO) possessing the flower-like structure with the surface covered by Poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS) polymer was synthesized successfully through the one-pot chemical synthesis technique. As-synthesized ZnO@PEDOT:PSS modified glassy carbon electrode (GCE) was engaged for effective electrochemical oxidation of chlorogenic acid (CGA). The uniform encapsulation of PEDOT:PSS polymer was confirmed by adopting HR-TEM and FE-SEM method. The physicochemical properties of the as-synthesized composite were studied by using various analytical techniques and the results seem more satisfactorily. Specifically, ZnO@PEDOT:PSS-GCE towards CGA oxidation shows wide-linear range, high sensitivity, limits of detection, and limits of quantification values are 0.03-476.2 mu M, 29.38 mu A mu M-1 cm(-2), 0.02 mu M, and 0.3 mu M, respectively. Furthermore, the potential of ZnO@PEDOT:PSS-GCE for the effectiveness determination of CGA is accessed by using coffee powder and soft drink as real-time samples.