A solid-state electrochemiluminescence sensing platform for detection of catechol based on novel luminescent composite nanofibers

► The luminescent composite nanofibers (Ru-MWNTs-PA6) were first fabricated by a one-step electrospinning technique. ► Ru-MWNTs-PA6 nanofibers exhibited excellent ECL behaviors on GC electrodes. ► It is the first solid-state ECL sensor based on Ru-MWNTs-PA6 for catechol detection. ► The detection limit for catechol is 1.0 nM, which is comparable or better than that in reported phenol assays.