title: Evaluation of a new electrochemical sensor for selective detection of non-enzymatic hydrogen peroxide based on hierarchical nanostructures of zirconium molybdate.
abstract: The construction and characterization of selective and sensitive non-enzymatic hydrogen peroxide (H2O2) electrochemical sensor based on sphere-like zirconium molybdate (ZrMo2O8) nanostructure are reported for the first time. The sphere-like ZrMo2O8were prepared via a simple hydrothermal route followed by annealing process. The structural and morphological properties were investigated by various analytical and spectroscopic techniques such as XRD, Raman, SEM, EDX, TEM, and XPS analysis. Furthermore, the electrochemical properties were investigated by cyclic voltammetry and amperometric techniques. The obtained results displayed that the prepared ZrMo2O8materials hold excellent-crystallinity, well-defined sphere-like formation and demonstrated superior electrochemical properties. Interestingly, the electrochemical H2O2sensor was constructed based on ZrMo2O8nanostructure on the glassy carbon electrode exhibited wide linear response ranges, good sensitivity and lower detection limit (LOD). The estimated sensitivity, wide linear ranges and LOD of the fabricated electrochemical sensor was 2.584μAμM-1cm-2, 0.05-523, 543-3053μM and 0.01μM respectively. The proposed sensor had excellent selectivity even in the presence of biologically co-interfering substances such as uric acid, dopamine, ascorbic acid and glucose. This effortless, fast, inexpensive technique for constructing a modified electrode is a gorgeous approach to the growth of new sensors.
authors.affiliation: Department of Chemistry, VHNSN College, Virudhunagar 626001, Tamil Nadu, India.
authors.forename: J
authors.initials: J
authors.lastname: Vinoth Kumar
authors.affiliation: Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei 106, Taiwan, ROC.
authors.forename: R
authors.initials: R
authors.lastname: Karthik
authors.affiliation: Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei 106, Taiwan, ROC. Electronic address: smchen78@ms15.hinet.net.
authors.forename: Shen-Ming
authors.initials: SM
authors.lastname: Chen
authors.affiliation: Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei 106, Taiwan, ROC.
authors.forename: N
authors.initials: N
authors.lastname: Raja
authors.affiliation: Department of Chemistry, VHNSN College, Virudhunagar 626001, Tamil Nadu, India.
authors.forename: V
authors.initials: V
authors.lastname: Selvam
authors.affiliation: Department of Chemistry, VHNSN College, Virudhunagar 626001, Tamil Nadu, India. Electronic address: muthuraj75@gmail.com.
authors.forename: V
authors.initials: V
authors.lastname: Muthuraj
keywords: Electrocatalysis; Electrochemical sensor; Hydrogen peroxide; Sphere-like structure; XPS; Zirconium molybdate