Ultrasound-assisted preparation and characterization of beta-Bi2O3 nanostructures: Exploring the photocatalytic activity against rhodamine B

Azizian-Kalandaragh Y., Sedaghatdoust-Bodagh F., Habibi-Yangjeh A.

SUPERLATTICES AND MICROSTRUCTURES, cilt.81, ss.151-160, 2015 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 81
  • Basım Tarihi: 2015
  • Doi Numarası: 10.1016/j.spmi.2014.12.038
  • Dergi Adı: SUPERLATTICES AND MICROSTRUCTURES
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.151-160
  • Anahtar Kelimeler: Bismuth oxide, Ultrasonic irradiation, Nanostructures, UV-visible spectroscopy, Photocatalytic activity, BISMUTH OXIDE, VISIBLE-LIGHT, BI2O3, FILMS, GROWTH, DEGRADATION, NANOWIRES, SILICA
  • Gazi Üniversitesi Adresli: Hayır

Özet

Bismuth based oxide (beta-Bi2O3) and mixed oxide/hydroxide nanostructures were prepared by ultrasound-assisted method in an aqueous solution. The prepared nanostructures were characterized by X-ray diffraction (XRD), energy dispersive analysis of X-rays (EDX), Fourier transformed-infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM), and UV-visible absorption spectroscopy. The results revealed that the as-prepared product was crystallized in mixed phase and it converts to pure beta-Bi2O3 by thermal treatments at 300 degrees C for 60 min. The band gap values for the mixed bismuth oxide/hydroxide and bismuth oxide nanostructures were 3.62 and 3.66 eV, respectively. The EDX spectrum shows that the bismuth oxide nanostructures are completely pure. The FT-IR spectrum of the products clearly demonstrates disappearance of BiO-H bonds during the thermal treatment. Photocatalytic activity of beta-Bi2O3 nanostructures for degradation of rhodamine B, as a dye pollutant, was investigated under UV illumination. (C) 2015 Elsevier Ltd. All rights reserved.