Performance of Bismuth Modified Carbon Nanotube Composite Titanium Electrode in Advanced Oxidation Process System

摘要

Advanced Oxidation Processes (AOPs) is the emerging technology of wastewater treatment, the property of electrode plays an important role in the performance for this system. Titanium (Ti) is a suitable material to apply in Advanced Oxidation Processes because of chemical stability, the Carbon Nanotube (CNT) has good electrical conductivity and high specific surface area, and Carbon nanotube modified by Bismuth (Bi) will provide the electrode to get the function of optimization for the electrochemical property. In this study, Carbon Nanotube (CNT) with modified by Bismuth (Bi) were prepared by electrodeposition, and make composite coated on the surface of Titanium (Ti). The electrodes were prepared under different electrodeposition time to analysis the texture and electrochemical properties. Rhodamine B (Rh B) dye used as test reagent to analysis the performance in the Advanced Oxidation Processes, the experiments included: Scanning Electron Microscope (SEM), X-ray diffraction (XRD), contact angle analyzer, and the property for electrochemical was measured by cyclic voltammetry (CV). It was show that the composite electrode prepared by electrodeposition for 5 minutes, the contact angle was 21.6° with the best hydrophilic property. In the cyclic voltammetry test, the electrode obtained that the coefficient of electron transfer achieved to 31.6 (k’), which is 3.16 times of the Titanium electrode; As compared with the titanium electrode, the experiment for decolor the Rh B dye shows that the reaction rate can increase by 2.86 times. In summary, the Carbon nanotubes modified by Bismuth composite coated on the titanium electrode will improve the efficiency in Advanced Oxidation Processes, and the electrode has high potential for development in the future.