Characterization of the hydrothermally synthesized nano-TiO2 crystallite and the photocatalytic degradation of Rhodamine B

ASILTURK M., Sayilkan F., ERDEMOGLU S., AKARSU M., SAYILKAN H., ERDEMOGLU M., ...Daha Fazla

JOURNAL OF HAZARDOUS MATERIALS, cilt.129, ss.164-170, 2006 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 129
  • Basım Tarihi: 2006
  • Doi Numarası: 10.1016/j.jhazmat.2005.08.027
  • Dergi Adı: JOURNAL OF HAZARDOUS MATERIALS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.164-170
  • Anahtar Kelimeler: nano-titania, hydrothermal process, photodegradation, Rhodamine B, AZO-DYE, PHOTOASSISTED DEGRADATION, NANOCRYSTALLINE ANATASE, TIO2, PHOTODEGRADATION, POLLUTANTS, TITANIA, WATER, IRRADIATION, PRECURSOR
  • İnönü Üniversitesi Adresli: Evet

Özet

Pure anatase-TiO2 nanoparticles with 8 nm average crystallite size was synthesized hydrothermally at 200 degrees C in 2 h. The structural and physicochemical properties of nano-TiO2 were determined by powder XRD, FT-IR, BET and SEM analyses. The behavior of anatase nano-TiO2 in catalytic degradation of Rhodamine B (RB) dye in transparent nano-TiO2 sol under UV-light was examined as a function of irradiation power of UV-Iight, irradiation time, amount of nano-TiO2 and initial RB concentration in the sol. Rhodamine B was fully degraded with the catalysis of the nano-TiO2 in a short time as low as 60 min. Photocatalytic activity of the nano-TiO2 for degradation of RB was compared with Degussa P-25 at optimum catalysis conditions determined for the nano-TiO2. It was found that, when compared to Degussa P-25, the nano-TiO2 could be repeatedly used with increasing photocatalytic activity. It was found that the photodegradation obeys the pseudo first-order reaction kinetics with the rate constant of 0.0658 min(-1), and the half period t(1/2) was 10.53 min. (c) 2005 Elsevier B.V. All rights reserved.