US EPA

1589753 

Journal Article 

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

Daghrir, R; Drogui, P; Ka, I; El Khakani, M; Robert, D 

2013 

1 

Journal of Applied Electrochemistry
ISSN: 0021-891X
EISSN: 1572-8838 

43 

4 

467-479 

10.1007/s10800-013-0531-8 

WOS:000315564300010 

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 x 10(-3) mM h(-1)). 

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