花状NiO-SnO2复合材料的葡萄糖无酶催化体系的研究

Flower-like NiO-SnO2 nanocomposite (NSNF) with electrochemical activity was synthesized by a solvothermal method. Then, the synthesized nanocomposites were used for the non-enzymatic glucose detection. The morphology and composition of the nanocomposites have been characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM) and X-ray diffraction (XRD). The synthesized NSNF was immobilized onto the surface of indium tin oxide (ITO) electrode and exhibited highly catalytic activity to the oxidation of glucose. The effect of NaOH concentration on the oxidation performance of glucose was investigated. Under the optimum conditions, the response current showed a linear relaFlower-like NiO-SnO2 nanocomposite and its non-enzymatic catalysis to glucosetionship with the increase of glucose concentration in the range of 0.01-26 mM, with a detection limit of 1 μM. The glucose sensor had a high selectivity for glucose detection, which could effectively resist the interference from ascorbic acid (AA), uric acid (UA), citric acid (CA) and hydrogen peroxide (H2O2). Finally, the glucose sensor was used in the fetal bovine serum to detect glucose and the results were satisfactory.