Microplasma and quenching-induced Co doped NiMoO4 nanorods with oxygen vacancies for electrochemical determination of glucose in food and serum

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

“…In Mo 3d spectra (Figure 4d), the peak for Mo 6+ 3d 5/2 and Mo 6+ 3d 3/2 were at 232.26 and 235.37 eV, and the peak positioned at 233.08 eV and 236.26 eV should be attributed to Mo 6+ 3d 5/2 and Mo 6+ 3d 3/2 , in consistent with the vibrational peaks from Raman spectra. Based on the above XPS analysis, it can be concluded that the successful doping of Mo element in Mo−CoO‐1 endowed the material more defects and oxygen vacancy, benefiting the nearby Co(II) convert into Co(IV) during the electrochemical process and enhancing the electrochemical catalytic activity of the prepared material [34,48–49] …”

“…Based on the above XPS analysis, it can be concluded that the successful doping of Mo element in MoÀ CoO-1 endowed the material more defects and oxygen vacancy, benefiting the nearby Co(II) convert into Co(IV) during the electrochemical process and enhancing the electrochemical catalytic activity of the prepared material. [34,[48][49] To investigate the electrochemical glucose sensing performance of prepared materials, cyclic voltammetry (CV) tests were performed on the samples without doping and with different concentrations of doping at a scan rate of 50 mV s À 1 in 0.1 M KOH. As shown in Figure 5a, MoÀ CoO-1 nanosheets showed a clear redox peak at 0.38/0.07 V (vs. Ag/AgCl) during the electrochemical process.…”

“…Secondly, Mo doping reduces the glucose adsorption free energy on CoO surfaces and improve the availability of active sites of the material. DFT calculations showed that compared with Co atom, Mo atom have more d states near the Fermi level, which lead to a substantial electron donation to the adsorbate and enhanced adsorption strength of glucose [48] . Thirdly, the nano‐honeycomb structure of Mo−CoO‐1 provide a large electrochemical active surface area and porous channels, which can accelerate the electrons and mass transport during the electrochemical reaction [25] …”

In situ preparation of hierarchical CuO@NiCo LDH core–shell nanosheet arrays on Cu foam for highly sensitive electrochemical glucose sensing

“…6 In contrast, electrochemical non-enzymatic methods have been widely studied and developed due to their low cost, high sensitivity, rapid response and portability. 7–9…”

“…6 In contrast, electrochemical non-enzymatic methods have been widely studied and developed due to their low cost, high sensitivity, rapid response and portability. [7][8][9] Recently, as a typical two-dimensional material, LDHs have been extensively studied by researchers because of their tunable electronic structure and elemental composition. 10 Especially, NiCo-LDH has become a hot spot in the field of electrocatalytic materials because of its abundant oxidation state and rapid electrolyte diffusion reaction.…”