Study on the performance of an improved Ti/SnO₂–Sb₂O₃/PbO₂ based on porous titanium substrate compared with planar titanium substrate

Abstract

This present work focused on systematically studying the effect of a porous Ti substrate on the surface structure and electrochemical properties of lead dioxide electrodes prepared by anodic deposition under galvanostatic conditions. Characterization experiments, including scanning electron microscopy (SEM), X-ray diffraction (XRD), linear sweep voltammetry (LSV), cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), accelerated life time testing and a degradation experiment of methylene blue trihydrate were performed to determine the effect of different Ti substrates. Compared with the planar Ti substrate, the results showed that the porous Ti substrate decreased the grain size of lead dioxide and formed a compact and fine surface coating. The electrode had smaller crystalline particles and a more compact structure. The porous Ti/SnO 2 -Sb 2 O 3 /PbO 2 electrode had a higher oxygen evolution overpotential, a larger active surface area and higher electrochemical activity. The lifetime of the porous Ti/SnO 2 -Sb 2 O 3 /PbO 2 electrode (214 h) was 3.69 times higher than that of the planar Ti/SnO 2 -Sb 2 O 3 /PbO 2 electrode (58 h). Moreover, the degradation rate constant of methylene blue trihydrate on the porous Ti substrate lead dioxide electrode (0.03868 min À1 ) was 1.52 times than that of the planar Ti substrate lead dioxide electrode (0.02542 min À1 ). Fig. 1 SEM morphology of cross-sections for (a) porous Ti/SnO 2 -Sb 2 O 3 /PbO 2 electrode (Â500), (b) planar Ti/SnO 2 -Sb 2 O 3 electrode.

Preparation and characterization of a novel porous Ti/SnO2–Sb2O3–CNT/PbO2electrode for the anodic oxidation of phenol wastewater

“…Table 3 The General current efficiency (GCE) and Specific energy consumption (SEC) for different PbO 2 electrodes. 28 As can be seen in Fig.13, the fluorescence intensity of 2-hydroxyterephthalic acid around 425 nm for two electrodes increased with increasing the reaction time, indicating that ·OH radicals were indeed formed on the anodes and played an important role in electrochemical degradation test. The two electrodes were characterized electrochemically by cyclic voltammograms tests in a 0.5 mol L -1 Na 2 SO 4 solution in the absence and in the presence of 100 mg L −1 phenol.…”

“…As a novel titanium matrix, porous Ti has the advantages of good corrosion resistance, high porosity, large surface area and good biocompatibility, widely used in aerospace, medical and chemical field 27,28 29 . As a novel titanium matrix, porous Ti has the advantages of good corrosion resistance, high porosity, large surface area and good biocompatibility, widely used in aerospace, medical and chemical field 27,28 29 .…”

Study on the Preparation and Characterizations of an Improved Porous Ti/TiO2/CdS‐CNT/C3N4 Photoelectrode and Photoelectric Catalytic Degradation of Methylene Blue

“…When current density increases suddenly, it reveals that oxygen evolution reaction(OER) started in the system, and the overpotential of oxygen evolution reaction can be acquired by linear polarization curve extrapolation . Figure shows the linear sweep voltammograms curves of different electrodes in 0.5 mol L −1 H 2 SO 4 solution at a scan rate of 20 mV s −1 .…”

“…More researchers have mainly paid attentions to doping CNT into the layer in order to enhance the electrocatalytic (EC) ability and electrical conductivity of the electrodes . Moreover, using porous Ti sheet as substrate to prepare electrodes has attracted scholars’ attentions because it's beneficial to optimize the EC performance . Zhang et al.…”

Preparation and Characterization of Porous Ti/SnO2–Sb2O3/PbO2 Electrodes for the Removal of Chloride Ions in Water

“…The current density was 5 mA cm −2 and the PbO 2 was deposited on the porous Ti/SnO 2 -Sb 2 O 3 electrode at 65 • C for 0.5 h under stirring conditions. Finally, the prepared porous Ti/SnO 2 -Sb 2 O 3 /PbO 2 electrodes were washed in deionized water [15][16][17].…”