One-pot chemical blasting synthesis of the bamboo-like multiwalled carbon nanotubes/graphene oxide nanocomposite and its application in electrochemical detection of dopamine

Multiwalled carbon nanotube (MWCNT)/graphene oxide (GO) nanocomposite fabricated by a novel one-pot chemical blasting method was used for electrochemical detection of dopamine (DA). Characterization data reveal that MWCNT/GO nanocomposite possesses well-developed three-dimensional bamboo-like structure and large specific surface area as well as good electrical conductivity. Electrochemical analysis suggests that the nanocomposite displays superior electrocatalytic activity towards the oxidation of DA, and the peak currents present a good linear relationship to the concentrations ranging from 0.5 to 400.0 mu M with a detection limit of 60 nM (S/N = 3). The prepared electrochemical sensor was applied to determine DA in pharmaceutical dopamine hydrochloride injection with satisfactory results.