Effect of Urea on the Morphology of Co₃O₄ Nanostructures and Their Application for Potentiometric Glucose Biosensor

Morphology-controlled fabrication of Co3O4 nanostructures and their comparative catalytic activity for oxygen evolution reaction

“…For example, Cao et al [19] reported the synthesis of 3D flower-like Co 3 O 4 by precisely controlling the urea concentration, and the Co 3 O 4 flowers possessed outstanding CO oxidation activity. Ibupoto et al [20] prepared Co 3 O 4 nanoflowers and nanowires by tailoring the concentration of urea, and the nanoflowers presented selectively sensitive to glucose. Therefore, it is an effective way to employ adjusting the concentration of urea instead of costing long reaction time for synthesizing Co 3 O 4 nanostructures, which could avoid the micro-/nanostructures and open spaces between neighboring particles being destroyed or blocked [9].…”

Chemically Modified Metal Oxide Nanostructures Electrodes for Sensing and Energy Conversion

“…successfully grown, they were used for the development of a sensitive glucose biosensor. 104 The majority of available data reveals that the Co3O4 nanostructures have been used as the main catalytic part. Here, we have used a heterogeneous catalysis of Co3O4 and GOx enzyme, we believe that, the properties of each component can be retained due to the compatibility of Co3O4.…”

“…51,104 Then, using the drop casting process, the GOx was physically adsorbed on the ZnO nanostructures surfaces through electrostatic attraction and the samples were left to dry in a fume hood at room temperature for 3 hours. A 100 mM of glucose analyte was prepared in 10 mM PBS having a pH of 7.3 and the low concentrations of glucose were prepared in PBS by dilution.…”

Highly active 3-dimensional cobalt oxide nanostructures on the flexible carbon substrates for enzymeless glucose sensing

“…Notably, 3D/Co 3 O 4 thorn-like nanostructures provide remarkable responses only for glucose oxidation, and there is no amperometric current response for interfering species agreeing well with the Cobased electrodes. 64,65,67,68 Reproducibility and stability of the glucose sensor…”