Photocatalytic degradation of 2-(4-methylphenoxy)ethanol over TiO2 spheres
authors Ilkaeva, M; Krivtsov, I; Diaz, E; Amghouz, Z; Patino, Y; Khainakov, S; Garcia, JR; Ordonez, S
nationality International
journal JOURNAL OF HAZARDOUS MATERIALS
author keywords Emerging pollutants; Micropollutants; Titanium peroxo complex; Anatase-based photocatalysts
keywords AQUEOUS SUSPENSION; AROMATIC ALCOHOLS; SELECTIVE OXIDATION; ORGANIC POLLUTANTS; HIGHLY EFFICIENT; TITANIA BEADS; SIZE; LIGHT; WATER; NANOPARTICLES
abstract The photocatalytic TiO2-assisted decomposition of 2-(4-methylphenoxy)ethanol (MPET) in aqueous solution has been studied for the first time. The intermediate compounds of MPET photodegradation have been also determined. A toxic p-cresol is formed in significant quantities during the photocatalytic reaction. A solvent-exchange approach for a template-free preparation of spherical TiO2 particles has been described, which is based solely on precipitation of hydrous titania from aqueous titanium peroxo complex by using organic solvents. The proposed method favours the formation of spherical titania particles with a mean size varying from 50 to 260 nm depending on the choice of solvent. The procedure for converting nonporous titania spheres into mesoporous material maintaining the same spherical morphology has been developed. The synthesized TiO2 spheres demonstrate a degree of MPET photo-degradation close to that of the commercial titania Aeroxide P25, besides being successfully recovered and reused for four reaction cycles without loss of photocatalytic activity. The effectiveness of the commercial Aeroxide P25 in MPET photodegradation, on the other hand, suffers 10-time drop during the third reaction cycle, which is attributed to its poor recoverability because the photocatalyst is composed of small particles of 20 nm size. (C) 2017 Elsevier B.V. All rights reserved.
publisher ELSEVIER SCIENCE BV
issn 0304-3894
year published 2017
volume 332
beginning page 59
ending page 69
digital object identifier (doi) 10.1016/j.jhazmat.2017.02.055
web of science category Engineering, Environmental; Environmental Sciences
subject category Engineering; Environmental Sciences & Ecology
unique article identifier WOS:000399261100007
link https://linkinghub.elsevier.com/retrieve/pii/S0304389417301425
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