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

Abstract

Attributed to high stability and reproducibility, nonenzymatic electrochemical sensors have been extensively utilized in the detection of various chemical substances. In this study, multiwalled carbon nanotube (MWCNT)/Ti-doped ZnO composite was prepared for fabrication of working electrode used in the detection of glutamate and ascorbic acid. Ti-doped ZnO particles with the average size of 44.47 ± 4.05 nm 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 the cyclic voltammetry technique. The cyclic voltammograms revealed the reduction reaction of glutamate close to −.5 V, whereas the oxidation reaction of ascorbic acid close to.5 V. Fair electrocatalytic performance, with acceptable sensitivity, limit of detection, and selectivity suggested potential utilization of MWCNT/Ti-doped ZnO nanocomposite in the detection of ascorbic acid and glutamate. © 2021 The American Ceramic Society