The photocatalytic degradation of 17α-ethynylestradiol by pure and carbon nanotubes modified TiO2 under UVC illumination

• Authors: Radina Kralchevska , Maria Milanova , Mirjana Bistan , Albin Pintar , Dimitar Todorovsky
• Languages of publication: EN

Abstracts

EN

Commercial product Degussa TiO2 P25, sol-gel produced TiO2 and TiO2 modified by carbon nanotubes addition (5% of the TiO2 mass) are tested as photocatalysts for the degradation of endocrine disrupting compound 17α-ethynylestradiol (1 µM aqueous solution). The molecular and crystal structure, phase composition, crystallite size, specific surface area, pore average diameter, their area and volume distribution, morphology, IR and UV/Vis spectra of the catalysts are characterized. HPLC is used for estrogen analysis. The sorption ability and photocatalytic activity (measured by degradation rate constant and percentage of the pollutant conversion) of the catalysts under UV (17 W, emission maximum at 254 nm) irradiation is determined. Full destruction of the pollutant is reached after 30 min irradiation in presence of Degussa P25. The performance of some of the catalysts is compared with literature data for their activity under 365 nm-illumination.

Keywords

EN

Photocatalysis; TiO2 ; Estrogens; Sol-gel method; Carbon nanotubes

• Publisher: De Gruyter Open
• Journal: Open Chemistry
• Year: 2012
• Volume: 10
• Issue: 4
• Pages: 1137-1148

Dates

published

1 - 8 - 2012

online

29 - 5 - 2012

Contributors

author

Radina Kralchevska

• Faculty of Chemistry, University of Sofia, 1164, Sofia, Bulgaria

author

Maria Milanova

• Faculty of Chemistry, University of Sofia, 1164, Sofia, Bulgaria

author

Mirjana Bistan

• Laboratory for Environmental Sciences and Engineering, National Institute of Chemistry, SI-1001, Ljubljana, Slovenia

author

Albin Pintar

• Laboratory for Environmental Sciences and Engineering, National Institute of Chemistry, SI-1001, Ljubljana, Slovenia

author

Dimitar Todorovsky

• Faculty of Chemistry, University of Sofia, 1164, Sofia, Bulgaria

Identifiers

DOI

10.2478/s11532-012-0017-2