Monodisperse-porous titania microspheres and their gold decorated forms as new photocatalysts for dye degradation in batch fashion
Küçük Resim Yok
Tarih
2018
Yazarlar
Hamaloglu, Kadriye Ozlem
Sag, Ebru
Bilir, Aykut
Tuncel, Ali
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
ELSEVIER SCIENCE SA
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
A new photocatalyst in the form of "monodisperse-porous titania microspheres" 5 mu m in size, was synthesized by a developed staged-shape template hydrolysis and condensation protocol. Different from the batch-decolorization studies performed with the "non-porous titania nanoparticles", a two-stage decolorization process including a fast initial dye adsorption and a relatively slower photodegradation was observed with the proposed photocatalyst. Higher initial decolorization rate was achieved due to the fast dye adsorption onto the porous titania microspheres with higher surface area with respect to "non-porous titania nanoparticles" commonly employed as photocatalyst in similar decolorization studies. Moreover, gold decorated forms of monodisperse-porous titania microspheres were also synthesized. Higher decolorization rates with respect to the bare titania microspheres were achieved with the gold decorated forms at neutral pH. Gold decorated photocatalyst synthesized using gold nanoparticles with lower size provided 50% higher decolorization rate due to their better electron transfer characteristics. (C) 2017 Elsevier B.V. All rights reserved.
Açıklama
Anahtar Kelimeler
Titania microspheres, Gold decorated titania microspheres, Photocatalysis, Dye degradation, Remazol Black 5
Kaynak
MATERIALS CHEMISTRY AND PHYSICS
WoS Q Değeri
Q2
Scopus Q Değeri
Q1
Cilt
207
