Hydrothermal Synthesis, Characterization and Photocatalytic Activity of Nanosized TiO_2 Based Catalysts for Rhodamine B Degradation

Authors

FUNDA SAYILKAN
MELTEM ASİLTÜRK
ŞADİYE ŞENER
SEMA ERDEMOĞLU
MURAT ERDEMOĞLU
HİKMET SAYILKAN

DOI

-

Abstract

Nanosize crystalline TiO_2 and SiO_2/TiO_2 mixed oxide particles as a photocatalyst for rhodamine B dye (RB) degradation in aqueous media were synthesized by a hydrothermal process at 200 °C. They were characterized using XRD, SEM, FT-IR, UV/VIS and BET analysis. The effects of silica content on the crystallinity and photocatalytic activity of TiO_2 were investigated. Photocatalytic activity of the nano-TiO_2 was compared with that of SiO_2/TiO_2 mixed oxides at the same conditions for degradation of RB, and mixed oxide catalysts showed more effective catalytic activity than the TiO_2. The results revealed that photodegradation of RB proceeds by pseudo-first-order reaction kinetics where the rate constant, k, for degradation of 30 mg/L RB using the catalyst with 0.05 SiO_2/TiO_2 mole ratio is 0.133 min^{-1}.

Keywords

SiO_2/TiO_2 mixed oxides, hydrothermal process, photocatalyst, rhodamine B, photodegradation

First Page

211

Last Page

221

Recommended Citation

SAYILKAN, FUNDA; ASİLTÜRK, MELTEM; ŞENER, ŞADİYE; ERDEMOĞLU, SEMA; ERDEMOĞLU, MURAT; and SAYILKAN, HİKMET (2007) "Hydrothermal Synthesis, Characterization and Photocatalytic Activity of Nanosized TiO_2 Based Catalysts for Rhodamine B Degradation," Turkish Journal of Chemistry: Vol. 31: No. 2, Article 12. Available at: https://journals.tubitak.gov.tr/chem/vol31/iss2/12