A Novel Approach to the Hydrothermal Synthesis of Anatase Titania Nanoparticles and the Photocatalytic Degradation of Rhodamine B

Authors

MURAT AKARSU
MELTEM ASİLTÜRK
FUNDA SAYILKAN
NADİR KİRAZ
ERTUĞRUL ARPAÇ
HİKMET SAYILKAN

DOI

-

Abstract

A novel approach was developed for the synthesis of high-dispersed anatase nano-TiO_2 by a hydrothermal process without solvent at 200 °C in 1 h. It was characterized using XRD, TEM, BET and elemental analysis. Nanoparticle-TiO_2 was used as a photocatalyst by considering complete degradation of Rhodamine B (RB) dye. The photocatalytic reaction parameters such as photocatalyst amount, irradiation time and dye concentration were optimized and it was found that 0.125 wt% catalyst in 30 mg/L of RB aqueous solution is adequate for full degradation of RB in 50 min with 770 W/m^2 irradiation power. Photocatalytic activity of the nanoparticle-TiO_2 was compared with Degussa P-25 at optimum catalysis conditions determined for the nanoparticle-TiO_2. It was concluded that when compared to Degussa P-25, the nanoparticle-TiO_2 can be repeatedly used with increasing photocatalytic activity. The results revealed that the photodegradation of RB proceeds by pseudo first-order reaction kinetics in which the rate constant of the degradation is 0.132 min^{-1}.

First Page

333

Last Page

343

Recommended Citation

AKARSU, MURAT; ASİLTÜRK, MELTEM; SAYILKAN, FUNDA; KİRAZ, NADİR; ARPAÇ, ERTUĞRUL; and SAYILKAN, HİKMET (2006) "A Novel Approach to the Hydrothermal Synthesis of Anatase Titania Nanoparticles and the Photocatalytic Degradation of Rhodamine B," Turkish Journal of Chemistry: Vol. 30: No. 3, Article 8. Available at: https://journals.tubitak.gov.tr/chem/vol30/iss3/8