Nanocomposite Prepared from In Situ Grafting of Polypyrrole to Aminobenzoyl-Functionalized Multiwalled Carbon Nanotube and Its Electrochemical Properties
ULSAN NATIONAL INSTITUTE OF SCIENCE AND TECHNOLOGY (KOREA SOUTH)
Pagination or Media Count:
We reported the functionalization of multiwalled carbon nanotube MWCNT with 4-aminobenzoic acid by a direct Friedel-Crafts acylation reaction in a mild polyphosphoric acid PPAphosphorous pentoxide P2O5 medium. The resulting 4- aminobenzoyl-functionalized MWCNT AF-MWCNT was used as a platform for the grafting of polypyrrole PPy in ammonium persulfate APSaqueous hydrochloric acid solution to produce PPy-grafted MWCNT PPy-g-MWCNT composite. After dedoping with alkaline treatment, PPy-g-MWCNT displayed 20 times higher electrical conductivity than that of PPy. The current density and cycle stability of PPy-g-MWCNT composite were also remarkably improved compared with those of PPy homopolymer, suggesting that an efficient electron transfer between PPy and MWCNT was possible through covalent links. In addition, PPy-g-MWCNT displayed high electrocatalytic activity for oxygen reduction reaction ORR.
- Refractory Fibers