Electrocatalytic degradation of aniline by Ti/Sb–SnO2, Ti/Sb–SnO2/Pb3O4 and Ti/Sb–SnO2/PbO2 anodes in different electrolytes

Effect of the sp3/sp2 Ratio in Boron‐Doped Diamond Electrodes on the Degradation Pathway of Aniline by Anodic Oxidation

“…Within this time, a yellow color was observed in the solution. However, this color disappeared for longer electrolysis times (>20 minutes), which is in agreement with the behavior of aniline polymerization on BDD and other electrodes reported in the literature …”

“…However, this color disappeared for longer electrolysis times (> 20 minutes), which is in agreement with the behavior of aniline polymerization on BDD and other electrodes reported in the literature. [56][57] During the EO, these polymeric species have high electron density, which makes them susceptible to attacks from * OH radicals until the formation of compounds with a lower molecular weight. An important difference related to the electrode surface was evidenced by the change in the molecular weight of the oligomer intermediates when the five BDD electrodes were used.…”

“…a DSA anode was used to degrade a low concentration of aniline (80 mg L −1 ) reaching an 89 % transformation to CO 2 in Na 2 SO 4 . Other examples are the works of Li and col . and Mitadeira and col .…”

“…In the work of Li and col. [50] a DSA anode was used to degrade a low concentration of aniline (80 mg L À 1 ) reaching an 89 % transformation to CO 2 in Na 2 SO 4 . Other examples are the works of Li and col. [51] and Mitadeira and col. [52] where (in the first of them) different mixed metal oxides (MMO) were used as an anode to eliminate aniline, with the composition of the MMO determining the effectiveness of the degradation in each support electrolyte used; while in the second work, potentiostat electrolysis was performed to reduce the aniline concentration but not that of the possible intermediates generated.…”

Direct fabrication of lamellar self-supporting Co3O4/N/C peroxymonosulfate activation catalysts for effective aniline degradation

“…Advanced oxidation processes based on Å OH or Å O 2 À have been commonly used in the degradation of persistent organic pollutants in water. For example, lots of technologies have been applied to generate Å OH or Å O 2 À radicals for aniline degradation including Fenton process [6,7], photocatalysis [8][9][10], catalytic wet oxidation [11][12][13], ozonation [14][15][16] and electrochemical oxidation [17][18][19][20]. However, these technologies have several limitations such as metal leaching, low pH rang (3)(4), excessive sludge production, and the high hydrogen peroxide transportation cost [1,4].…”