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Photocatalytically-assisted electrochemical degradation of p-aminophenol in aqueous solutions using zeolite-supported TiO2 catalyst

  • Cornelia Ratiu EMAIL logo , Florica Manea , Carmen Lazau , Corina Orha , Georgeta Burtica , Ioan Grozescu and Joop Schoonman
Published/Copyright: March 16, 2011
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Chemical Papers
From the journal Chemical Papers Volume 65 Issue 3

Abstract

This paper reports the results of an investigation into enhancement of the electrochemical oxidation of p-aminophenol (4-AP) in an aqueous solution with a boron-doped diamond (BDD) electrode, assisted by photocatalysis using a zeolite-supported TiO2 (Z-TiO2) catalyst. The BDD electrode was characterised in 0.1 M Na2SO4-supporting electrolyte and the presence of 4-AP by open-circuit potential behaviour (OCP) and cyclic voltammetry (CV). The electrode behaviour was investigated in the dark and following UV irradiation and in the absence/presence of the Z-TiO2 catalyst. The electro-oxidation process was carried out using chronoamperometry (CA) and multiple-pulsed amperometry (MPA) at the selected potential under potentiostatic conditions. The electrochemical degradation process of 4-AP on the BDD electrode was improved by the application of a pulsed potential, which allowed both in-situ electrochemical cleaning of the electrode and indirect oxidation of 4-AP by oxygen evolution. The application of photocatalysis using Z-TiO2 in the 4-AP electrochemical degradation exhibited an enhanced effect when the anodic potential was set at +1.25 V vs. Ag/AgCl in the water stability region, close to the oxygen evolution potential.

Keywords: p-aminophenol removal; electrochemical oxidation; photocatalytically-assisted electrochemical oxidation; zeolite-supported TiO2

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Published Online: 2011-3-16
Published in Print: 2011-6-1

© 2011 Institute of Chemistry, Slovak Academy of Sciences

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https://doi.org/10.2478/s11696-011-0009-2
Keywords for this article
p-aminophenol removal; electrochemical oxidation; photocatalytically-assisted electrochemical oxidation; zeolite-supported TiO2

Articles in the same Issue

  1. Steam-reforming of ethanol for hydrogen production
  2. Polymeric ionic liquid as a background electrolyte modifier enhancing the separation of inorganic anions by capillary electrophoresis
  3. Enantioselective extraction of terbutaline enantiomers with β-cyclodextrin derivatives as hydrophilic selectors
  4. Effective photocatalytic degradation of an azo dye over nanosized Ag/AgBr-modified TiO2 loaded on zeolite
  5. Photocatalytically-assisted electrochemical degradation of p-aminophenol in aqueous solutions using zeolite-supported TiO2 catalyst
  6. Spectroscopic investigations and physico-chemical characterization of newly synthesized mixed-ligand complexes of 2-methylbenzimidazole with metal ions
  7. Synthesis, molecular characterisation, and in vivo study of platinum(IV) coordination compounds against B16 mouse melanoma tumours
  8. Swelling properties of particles in amphoteric polyacrylamide dispersion
  9. Electronic structures and spectroscopic regularities of phenylene-modified SWCNTs
  10. An expeditious, environment-friendly, and microwave-assisted synthesis of 5-isatinylidenerhodanine derivatives
  11. Pd-catalysed conjugate addition of arylboronic acids to α,β-unsaturated ketones under microwave irradiation
  12. Regioselective N-alkylation of (2-chloroquinolin-3-yl) methanol with N-heterocyclic compounds using the Mitsunobu reagent
  13. Antimycobacterial 3-phenyl-4-thioxo-2H-1,3-benzoxazine-2(3H)-ones and 3-phenyl-2H-1,3-benzoxazine-2,4(3H)-dithiones substituted on phenyl and benzoxazine moiety in position 6
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  15. Solubility of methane in pure non-ionic surfactants and pure and mixtures of linear alcohols at 298 K and 101.3 kPa
  16. Theoretical studies on polynitrobicyclo[1.1.1]pentanes in search of novel high energy density materials
  17. Insight into the degradation of a manganese(III)-citrate complex in aqueous solutions
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