CuO nanofibers immobilized on paraffin-impregnated graphite electrode and its application in the amperometric detection of glucose

1-D nanostructures are promising materials for development of electrochemical devices offering benefits such as fast electron transfer rates and large surface areas. Copper oxide nanofibers (CuONFs) synthesized by electrospinning technique and subsequent thermal treatment, were used to modify paraffin-impregnated graphite electrode (PIGE) for a sensitive non-enzymatic glucose detection. The structure and morphology of CuO-NFs were characterized by scanning electron microscopy and transmission electron microscopy. The electrocatalytic activity towards glucose oxidation was evaluated by cyclic voltammetry and chronoamperometry. The results reveal a wide linear response to glucose ranging from 1.0 × 10-6 to 1.93 × 10-3 mol L-1 (R2 = 0.9927). The limit of detection was 0.39 × 10-6 mol L-1 (LOD = 3σ/s). The high aspect ratio of the nanofibers arranged in a three-dimensional network structure significantly enhances the electron transfer process. The electrode preparation is simple and rapid execution, and more importantly the graphite rod is relative low-cost and easy to achieve surface renewal for reusability

CuO nanofibers immobilized on paraffin-impregnated graphite electrode and its application in the amperometric detection of glucose

1-D nanostructures are promising materials for development of electrochemical devices offering benefits such as fast electron transfer rates and large surface areas. Copper oxide nanofibers (CuONFs) synthesized by electrospinning technique and subsequent thermal treatment, were used to modify paraffin-impregnated graphite electrode (PIGE) for a sensitive non-enzymatic glucose detection. The structure and morphology of CuO-NFs were characterized by scanning electron microscopy and transmission electron microscopy. The electrocatalytic activity towards glucose oxidation was evaluated by cyclic voltammetry and chronoamperometry. The results reveal a wide linear response to glucose ranging from 1.0 × 10-6 to 1.93 × 10-3 mol L-1 (R2 = 0.9927). The limit of detection was 0.39 × 10-6 mol L-1 (LOD = 3σ/s). The high aspect ratio of the nanofibers arranged in a three-dimensional network structure significantly enhances the electron transfer process. The electrode preparation is simple and rapid execution, and more importantly the graphite rod is relative low-cost and easy to achieve surface renewal for reusability

Direct synthesis of singular silver dendrites over TiO2 nanotubes using pentetic acid as capping agent

Silver dendritical nanostructures are known for their interesting electronic and optical properties com-pared to other Ag morphologies, vastly utilized for covering TiO2nanotubes. However, multiple stepsare required to assemble both of these structures. This paper reports a novel synthesis of verticallyaligned TiO2nanotubes covered by a forest of silver dendrites, obtained through the incorporation of elec-trodeposition (ED) cycle before the anodization process. Utilizing pentetic acid as a capping agent pro-motes superficial silver nucleation in both ED and anodization cycles. Also, testing varied ED cyclelengths provided information regarding the morphological evolution of the hierarchical silver structures,as some branches adopted a 90°angle from the central axis