Electrochemical determination of tert-butylhydroquinone by ZIF- 67@TiO 2 derived hierarchical TiO 2 /Co/NCNTs

Abstract

Abstract Heterostructured TiO2/Co nanoparticles/N-doped carbon nanotubes (TiO2/Co/NCNTs) nanomaterial had been derived from ZIF-67@TiO2 by calcination at high temperature in an Ar/H2 atmosphere. The obtained TiO2/Co/NCNTs composites was made up of numerous dodecahedron-like boxes with twisting nanotubes on surfaces, modified on glassy carbon electrode (GCE) for the electrochemical determination of tert-butylhydroquinone (TBHQ). The excellent electrocatalytic performance for TBHQ could be owing to the combination of multi-phase composition, fast electron transfer and the constructed Co/Ti multi-active sites. TiO2/Co/NCNTs sensor held broad linearity from 0.04 to 100 µM with a low detection limit of 4 nM, and possessed stability, anti-interfering ability and reproducibility. Finally, the analytical utility of the TiO2/Co/NCNTs sensor was checked by detecting TBHQ in the edible oil.