TiO2 nanotube arrays-based reactor for photocatalytic oxidation of parabens mixtures in ultrapure water: Effects of photocatalyst properties, operational parameters and light source

João Gomes , João Lincho , Eva Domingues , Marta Gmurek , Paweł Mazierski , Adriana Zaleska-Medynska , Tomasz Klimczuk , Rosa M. Quinta-Ferreira , Rodrigo Prado Martins

Abstract

Self-organized TiO2 nanotubes as immobilized photocatalysts were evaluated in detail for the photocatalytic degradation of parabens mixtures from ultrapure water. This kind of approach can be a very suitable option for emerging contaminants degradation considering the possibility of the catalyst reuse and recovery which will be simpler than when catalytic powders are used. The anodization method was applied for the TiO2 nanotubes production under different preparation voltages (20, 30 and 40 V). These preparation conditions are important on the morphological characteristics of nanotubes such as length, as well as internal and external diameters. The photocatalytic efficiency was dependent on the materials preparation voltages. The photocatalytic oxidation was evaluated using two different irradiation sources, namely UVA and sunlight. These irradiation sources were evaluated for parabens mixture degradation using different number of catalytic plates. The increase of the number of plates improved the parabens degradation possibly due to the availability of more active sites which can be relevant for the hydroxyl radical's generation. The effect of the reactor design was also evaluated using sunlight irradiation. The configuration, position and solar concentrators can be important for the performance of degradation. The mechanism of degradation was analysed through by-products formation under sunlight irradiation. The main responsible for parabens degradation was hydroxyl radical. Decarboxylation, dealkylation and hydroxylation seem to be the most important reactional steps for the mixture decontamination.
Author João Gomes
João Gomes,,
-
, João Lincho
João Lincho,,
-
, Eva Domingues
Eva Domingues,,
-
, Marta Gmurek
Marta Gmurek,,
-
, Paweł Mazierski (FCh / DET / LPh)
Paweł Mazierski ,,
- Laboratory of Photocatalysis
, Adriana Zaleska-Medynska (FCh / DET / LPh)
Adriana Zaleska-Medynska,,
- Laboratory of Photocatalysis
, Tomasz Klimczuk
Tomasz Klimczuk,,
-
, Rosa M. Quinta-Ferreira
Rosa M. Quinta-Ferreira,,
-
, Rodrigo Prado Martins
Rodrigo Prado Martins,,
-
Journal seriesScience of the Total Environment, ISSN 0048-9697, e-ISSN 1879-1026, (N/A 200 pkt)
Issue year2019
Vol689
Pages79-89
Publication size in sheets0.5
Keywords in Englishnanotubes, reactor design, parabens, sun-driven technologies, by-products
ASJC Classification2304 Environmental Chemistry; 2305 Environmental Engineering; 2310 Pollution; 2311 Waste Management and Disposal
DOIDOI:10.1016/j.scitotenv.2019.06.410
Languageen angielski
File
Gomes_Joao_TiO2_nanotube_2019.pdf 2.39 MB
Score (nominal)200
Score sourcejournalList
ScoreMinisterial score = 200.0, 03-03-2020, ArticleFromJournal
Publication indicators WoS Citations = 1; Scopus SNIP (Source Normalised Impact per Paper): 2016 = 1.849; WoS Impact Factor: 2018 = 5.589 (2) - 2018=5.727 (5)
Citation count*1 (2020-03-31)
Cite
Share Share

Get link to the record


* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
Back
Confirmation
Are you sure?