Mesoporous cobalt ferrite flowers based excellent non enzymatic glucose sensor

Highly sensitive detection of glucose at a novel non‐enzyme electrochemical sensing based on Mo‐doped CoO Nanosheets

“…These extremely thin nanowalls provide a large surface area for the adsorption of the reaction, and the cavities formed by their interconnection also facilitate the diffusion of the electrolyte, thereby improving the catalytic activity. [16] The HRTEM images of MoÀ CoO-1 nanosheets (Figure 2d) showed two sets of clear lattice stripes with spacing of 0.364 nm and 0.221 nm, which can be attributed to the (311) and ( 200) planes of CoO (PDF#42-1300), respectively. The SAED diagram also proved the formation of CoO, and the marked diffraction ring was originated from the (200) crystal plane.…”

“…In transmission electron microscopy (TEM) image (Figure 2c), the Mo−CoO‐1 sample was observed to be the extremely thin nanosheet structure, in consistent with the SEM image. These extremely thin nanowalls provide a large surface area for the adsorption of the reaction, and the cavities formed by their interconnection also facilitate the diffusion of the electrolyte, thereby improving the catalytic activity [16] . The HRTEM images of Mo−CoO‐1 nanosheets (Figure 2d) showed two sets of clear lattice stripes with spacing of 0.364 nm and 0.221 nm, which can be attributed to the (311) and (200) planes of CoO (PDF#42‐1300), respectively.…”

“…Usually, the d‐orbital electrons of cobalt element are not fully occupied, allowing it to accept and subsequent transfer lone electrons, thereby promoting the catalytic reactions. Meanwhile, the formed polyvalent cobalt element interacted with the analytes, facilitating the transformation of matter, achieving high sensitivity change of current density [15–17] . Until now, a variety of cobalt oxides‐based electrode materials have been investigated, for example, CoO nanoparticles, [18] Co 3 O 4 nanorods, [19] CoO nanoneedles [20] and so on.…”

“…Meanwhile, the formed polyvalent cobalt element interacted with the analytes, facilitating the transformation of matter, achieving high sensitivity change of current density. [15][16][17] Until now, a variety of cobalt oxides-based electrode materials have been investigated, for example, CoO nanoparticles, [18] Co 3 O 4 nanorods, [19] CoO nanoneedles [20] and so on. Among them, CoO nanostructures as electrode materials have been extensively used in nonenzymatic glucose sensor due to their distinguished electrocatalytic behavior toward glucose oxidation and good chemical stability.…”