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Application of Fe-doped TiO 2 specimens for the solar photocatalytic degradation of humic acid       
Yazarlar
Nazmiye Cemre Birben
Türkiye
Ceyda Senem Uyguner Demirel
Boğaziçi Üniversitesi, Türkiye
Sibel Sen Kavurmaci
Yelda Yalçın Gürkan
Tekirdağ Namık Kemal Üniversitesi, Türkiye
Doç. Dr. Ümit Nazlı TÜRKTEN Doç. Dr. Ümit Nazlı TÜRKTEN
Yıldız Teknik Üniversitesi, Türkiye
Zekiye Cinar
Fatma Miray Bekbölet
Boğaziçi Üniversitesi, Türkiye
Özet
This study aimed to assess solar photocatalytic activity of Fe-doped TiO2 specimens for the degradation of natural organic matter (NOM) represented by a model humic acid (HA). Fe-doped TiO2 specimens (P-25 and UV-100) were prepared by a wet impregnation method. Humic acid (molecular size < 100 kDa) was characterized by UV-vis and fluorescence spectroscopic parameters and dissolved organic carbon (DOC) content both prior to and following solar photocatalysis. Molecular size fractionation data revealed a shift to lower molecular size fractions i.e.: 30 kDa, 10 kDa and 3 kDa being more pronounced in case of Fe-doped UV-100 in comparison to Fe-doped P-25. Excitation-emission matrix (EEM) fluorescence features of indicated humic molecular size fractions did not illustrate any significant difference related to the formation of new fluorophoric regions but displayed the shift from humic-like fluorophores to fulvic-like fluorophores even in 3 kDa fraction indicating that humic acid followed a photocatalyst type independent pathway via solar photocatalysis. Slower DOC removal rates were attained for Fe-doped TiO2 specimens with respect to bare specimens indicating the importance of substrate properties rather than the inefficiency of visible light activation by metal doping of photocatalyst. (C) 2016 Elsevier B.V. All rights reserved.
Anahtar Kelimeler
EEM | Fe-doped TiO 2 | Humic acid | Molecular size distribution | Solar photocatalytic degradation
Makale Türü Özgün Makale
Makale Alt Türü SSCI, AHCI, SCI, SCI-Exp dergilerinde yayımlanan tam makale
Dergi Adı CATALYSIS TODAY
Dergi ISSN 0920-5861
Dergi Tarandığı Indeksler SCI
Dergi Grubu Q2
Makale Dili İngilizce
Basım Tarihi 03-2017
Cilt No 281
Sayı 1
Sayfalar 78 / 84
Doi Numarası 10.1016/j.cattod.2016.06.020
Makale Linki https://linkinghub.elsevier.com/retrieve/pii/S0920586116304217