MWCNT/Ti-doped ZnO nanocomposite as electrochemical sensor for detecting glutamate and ascorbic acid

Attributed to high stability and reproducibility, non-enzymatic electrochemical sensors have been extensively utilized in detection of various chemical substances. In this study, multi-walled carbon nanotube (MWCNT)/Ti-doped ZnO composite was prepared for fabrication of working electrode used in detection of glutamate and ascorbic acid. Ti-doped ZnO particles with the average size of 44.47 ± 4.05 nanometers were synthesized by the solution combustion technique. Hydrothermal impregnation was employed in preparation of the MWCNT/Ti-doped ZnO composite. Electrocatalytic activities of the MWCNT/Ti-doped ZnO composite were examined using cyclic voltammetry technique. The cyclic voltammograms revealed the reduction reaction of glutamate close to -0.5 V, whereas the reduction reaction of ascorbic acid close to 0.05. Fair electrocatalytic performance, with acceptable sensitivity, limit of detection and selectivity suggested potential utilization of MWCNT/Ti-doped ZnO nanocomposite in detection of ascorbic acid and glutamate.