Functionalization of multi-walled carbon nanotubes with various 4-substituted benzoic acids in mild polyphosphoric acid/phosphorous pentoxide Original Research Article

Functionalization of multi-walled carbon nanotubes (MWCNTs) with various 4-substituted benzoic acids (BAcs) was conducted by using “direct” Friedel–Crafts acylation in mild polyphosphoric acid/phosphorous pentoxide. The degree of functionalization was stu