Ultrasound-assisted preparation and characterization of beta-Bi2O3 nanostructures: Exploring the photocatalytic activity against rhodamine B
SUPERLATTICES AND MICROSTRUCTURES, cilt.81, ss.151-160, 2015 (SCI-Expanded, Scopus)
- 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.