dc.description.abstract | Abstract
Fabrication of Ni(OH)2 / Carbon Nanotubes / Carbon Fiber Composite Electrode and Its Electrode Kinetics in Urea Solution
Many by-products of food processing, fertilizers used in agricultural fertilization, or laundry detergent used in households contain urea pollutants. When it is discharged into river and sea, it will cause eutrophication of nature.This research mainly synthesizes Ni(OH)2 catalyst material and carbon nanotubes on the surface of carbon fiber by one-step electrophoretic co-deposition method, and prepares carbon fiber composite electrode material through the subsequent hydrothermal reaction process, and discusses carbon fiber composite electrode The performance of the material in the electrolysis of urea.
According to the analysis results of FE-SEM, the pretreatment process of carbon fiber can effectively remove the epoxy resin on the outer layer. From the analysis results of XPS, it can be known that the pretreatment process of carbon nanotubes can functionalize the surface, and the proportion of oxygen-containing functional groups on the surface is positively correlated with the pickling time. And such characteristics have been proved to help the subsequent synthesis of carbon fiber composite electrode materials. According to the XRD analysis results, the hydrothermal reaction process can effectively improve the crystallinity of Ni(OH)2 catalyst materials.
The analysis results of FE-SEM, EDS-Mapping, TGA, and Raman confirm that the carbon fiber composite electrode material has been successfully synthesized. From the analysis results of cyclic voltammetry, it can be clearly observed that there is a linear relationship between the peak current of the reaction and the root of the scan rate, which proves that the electrolysis reaction system is a diffusion control mechanism. According to the results of the Tafel polarization curve, the exchange current density of the carbon fiber composite electrode material is 0.056 (A/m2). From the UV-vis analysis results, it can be known that the reduction of the characteristic peaks of the functional groups of urea confirms its degradation. In this study, a simple and low-cost process has been successfully used to synthesize nickel hydroxide carbon nanotube composite electrode materials, which can be used in urea degradation reactions with less overpotential than traditional electrode materials.
Keywords: Carbon nanotubes, carbon fibers, nickel hydroxide, composite electrodes, urea. | en_US |