Preparation Of Copper-based Oxides For Application In Non-enzymatic Glucose Sensors

Glucose enzymatic sensor via enzyme catalyze glucose oxidase,but enzymatic is instable.Noble metal and transition metal oxides used tu modified electrode ofNon-enzymatic glucose sensor and it can directly catalyze glucose oxidase.Copper-based oxides and it's composite due to it is cheap,low-toxicity,simple production,strong anti-interference capacity and high catalytic activity was widely applied in non-enzymatic glucose sensors.So devuelop novel Copper-based oxides using new fabrication for improve performance of non-enzymatic glucose sensors.?.Preparation of hierarchical three-dimensional CuO spindles and highly sensitive glucose determinationHierarchical three-dimensional 3D-CuO spindles assembled from nanoslices were prepared via a hydrothermal process.The numerous particle boundaries acting as active sites for glucose oxidation in an alkaline solution.The CuO spindles electrode exhibited a broad detection range from 0.001-3.0 mM,sensitivity is 2828?A mM^-1 cm^-2 and a low detection limit of 0.3?M,+0.5 V vs.Ag/AgCl.The CuO spindle electrode also demonstrated excellent selectivity to glucose oxidation in the presence of several electro-active species.?.Synthesis of Hierarchically Nano-sized Urchin-like CuO for Electrochemical Glucose OxidationNanourchin-like CuO assembled from nanowires were synthesized by the thermal treatment and a interfacial reaction.The hierarchical structure of nanourchin-like CuO exhibited many grain boundaries acting as the active sites for glucose oxidation.Under an optimal potential of+0.5 V vs.Ag/AgCl,the developed CuO electrode showed a broad glucose detection range of 0.5?M-2.0 mM with a low detection limit of 0.3?M and a sensitivity of 3709?A mM^-1 cm^-2.The developed urchin-like CuO electrode materials also demonstrated excellent selectivity in the presence of several electro-active species.Overall,we conclude that complex particle structure?of possible multiple grain boundary content?improves sensitivity for glucose detection.?.Preparation of octahedral-Cu₂O@Cu₂S composite for non-enzymatic glucose sensorsoctahedral-Cu₂O@Cu₂S were synthesized by the octahedral-Cu₂O sulfureted with sodium sulfide.Surface of octahedral-Cu₂O coated by nanoparticle Cu₂S.Cu₂O and Cu₂S both was P-type semiconductor and good catalyst.Composite Cu₂O@Cu₂S electrode exhibited good catalytic activity for glucose oxidation due tu the synergistic effect of Cu₂O and Cu₂S.Under an optimal potential of+0.5 V vs.Ag/AgCl,composite Cu₂O@Cu₂S electrode showed more high sensitivity 3464?A Mm^-1cm^-2 than octahedral-Cu₂O electrode 2198?A Mm^-1cm^-2,in addition,composite Cu₂O@Cu₂S electrode demonstrated a more broad glucose detection range 1?M—1mM and a lower detection limit 0.2?M compared with octahedral-Cu₂O electrode.