Journal of Applied Electrochemistry

, Volume 43, Issue 4, pp 467–479

Photoelectrocatalytic bleaching of p-nitrosodimethylaniline using Ti/TiO2 nanostructured electrodes deposited by means of a pulsed laser deposition process

  • Rimeh Daghrir
  • Patrick Drogui
  • Ibrahima Ka
  • My Ali El Khakani
  • Didier Robert
Original Paper

DOI: 10.1007/s10800-013-0531-8

Cite this article as:
Daghrir, R., Drogui, P., Ka, I. et al. J Appl Electrochem (2013) 43: 467. doi:10.1007/s10800-013-0531-8

Abstract

This study investigated the potential use of oxidation in a photoelectrocatalytic cell for bleaching p-nitrosodimethylaniline. The Ti/TiO2 used as photo-anode was prepared by a pulsed laser deposition method. The TiO2 coatings were found to have rutile and anatase structures consisting of approximately 10 and 15 nm in diameter, respectively. A relatively high degradation rate of p-nitrosodimethylaniline was recorded using the photoelectrocatalytic cell, compared to those measured during conventional electrochemical oxidation, direct photolysis and photocatalysis processes. The influence of different parameters such as crystallographic structure of Ti/TiO2, type of cathode, potential applied, electrolysis time, UV irradiation and initial pH were investigated. The photoelectrocatalytic cell using Ti/TiO2 (anatase structure) as photo-anode and vitreous carbon as cathode operated at a current intensity of 0.1 A for 120 min with 254 nm of UV irradiation was found to have the best conditions to remove high amounts of p-nitrosodimethylaniline (22.6 × 10−3 mM h−1).

Keywords

Photoelectrocatalytic oxidation p-Nitrosodimethylaniline Reactive oxygen species Titanium dioxide semiconductor photocatalyst 

List of symbols

CB

Conduction band

DP

Direct photolysis

EO

Electro-oxidation

Gr

Graphite

PC

Photocatalysis

PECO

Photoelectrocatalytic oxidation

PLD

Pulsed laser deposition

RNO

p-Nitrosodimethylaniline

ROS

Reactive oxygen species

SS

Stainless steel

SEM

Scanning electron microscopy

TiO2

Titanium dioxide

VB

Valence band

VC

Vitreous carbon

XRD

X-ray diffraction

XPS

X-ray photoelectron spectroscopy

Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  • Rimeh Daghrir
    • 1
  • Patrick Drogui
    • 1
  • Ibrahima Ka
    • 2
  • My Ali El Khakani
    • 2
  • Didier Robert
    • 3
  1. 1.Institut national de la recherche scientifique, Centre Eau, Terre et EnvironnementUniversité du QuébecQuébecCanada
  2. 2.Institut national de la recherche scientifique, INRS-Énergie, Matériaux et TélécommunicationsUniversité du QuébecVarennesCanada
  3. 3.Antenne de Saint-Avold du Laboratoire des Matériaux, Surface et Procédés pour la Catalyse (LMSPC) CNRS-UMR 7515Université De LorraineSaint-AvoldFrance

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