Polypyrrole/tannin biobased nanocomposite with enhanced electrochemical and physical properties

• Main Authors: Abdi, Mahnaz M., Mohd Azli, Nur Farhana Waheeda, Lim, Hong Ngee, Md. Tahir, Paridah, Karimi, Gholamreza, Hoong, Yeoh Beng, Khorram, Mohammad
• Format: Article
• Language: English
• Published: Royal Society of Chemistry 2018
• Online Access: http://psasir.upm.edu.my/id/eprint/73553/1/Polypyrroletannin%20biobased%20nanocomposite%20with%20enhanced%20electrochemical%20and%20physical%20properties.pdf; http://psasir.upm.edu.my/id/eprint/73553/; https://pubs.rsc.org/en/content/articlelanding/2018/ra/c7ra13378b
• Institution: Universiti Putra Malaysia

In this research, tannin (TA) extracted from Acacia mangium and a cationic surfactant, cetyltrimethylammonium bromide (CTAB), were used to modify and enhance the physical and electrochemical properties of a polypyrrole (PPy) composite. Brunauer–Emmett–Teller (BET) analysis presented a higher degree of surface area and porosity for the PPy/TA/CTAB nanocomposite. A highly porous and rod like structure with a lumpy surface was observed for PPy/TA prepared in the presence of CTAB by Field Emission Scanning Electron Microscopy (FESEM) and Transmission Electron Microscopy (TEM). Cyclic voltammograms of the modified SPE electrode using PPy/TA/CTAB displayed an enhanced current response compared to the electrode modified with only PPy or PPy/TA. Electrochemical Impedance Spectroscopy (EIS) exhibited a lower value of charge transfer resistance (Rct) and higher electron transfer for the modified electrode, making the nanocomposite a promising candidate for biosensor application.