Electrochemical inspection of polypyrrole/chitosan/zinc oxide hybrid composites

Abstract

Polymer nanocomposite composed of polypyrrole, chitosan, and zinc oxide nanoparticles has been synthesized and it has been evaluated for various electrochemical aspects of the current electrochemical industry. The polypyrrole (PPy) was synthesized by the chemical oxidative polymerization reaction by employing ammonium persulfate as oxidizing agent. Composites of polypyrrole/chitosan (PPy/Chy) and polypyrrole/chitosan/ZnO (PCZ) composites were synthesized by the solution blending method. Detailed structural, morphological, thermal characterization of PPy, PPy/Chy, and PCZ were performed to characterize the specific features of the systems. The composites exhibit better thermal stability and high surface area and the addition of ZnO nanoparticle increase the crystallinity of the composite. Electrochemical characterization of the ITO electrodes modified with PPy, PPy/Chy, and PCZ were performed using cyclic voltammetry, electrochemical impedance spectroscopy, and amperometry techniques. The present study highlights the role of a bio‐compatible material with high surface area and conductive constituent for designing of various high performing electronic noninvasive sensors, biosensors, and so forth.

Novel sustainable Cellulose Acetate based biosensor for Glucose Detection

“…Thermogravimetric analysis (TGA) of the samples was performed under N 2 atmosphere by raising the temperature from room temperature to 600 ˚C. Figures (4) 25 . The increase in the temperature from 177 ˚C to around 282 ˚C resulted in an increase in weight loss due to the condensation dehydration of the hydroxyls 25 .…”

“…However, polypyrrole suffers from some shortcomings such as poor mechanical features and chemical sensitivity leading to poor processibility [3]. The compositing between polypyrrole and other materials (e.g., ZnO, cellulose acetate) can overcome its processibility shortage and increase its stability, sensitivity and biomolecule immobilization of the biosensor 4 .…”

Electrocatalytic Properties of ZnO Thin Film Based Biosensor for Detection of Uric Acid

“…It has been used for detection of various bio-analytes in human blood including glucose [4], cholesterol [5], H 2 O 2 [6], urea [7], DNA [8], etc. Recently, ZnO finds great applications in development of reagentless biosensors by doping [9], forming p-n junction heterostructures [1], or making hybrid composites [10]. Wu et al [11] have reported a photoelectrochemical and self-powered biosensor based on p-n junction of ZnO and Cu 2 O. Uddin et al [12] have reported the development of a chemisensor based on GCE modified with ZnO/RuO 2 NPs for detection of 2nitrophenol in different water samples.…”