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• W2247106786 abstract "Bi 2 O 3 -TiO 2 nanocomposites were obtained by sol-gel method using tween 80 (T-80) or polyvinyl pyrrolidone-polyethylene glycol (PVP-PEG) as templating agent. The powder X-ray diffraction (XRD) patterns of both the composites reveal the crystal structure of Bi 2 O 3 as primitive tetragonal and TiO 2 is in anatase phase. The energy dispersive X-ray (EDX) spectra provide the composition of Bi 2 O 3 in Bi 2 O 3 -TiO 2 (T-80) and Bi 2 O 3 -TiO 2 (PVP-PEG) as 3.8 and 20.4 mol. %, respectively. The average crystallite sizes of Bi 2 O 3 -TiO 2 (T-80) and Bi 2 O 3 -TiO 2 (PVP-PEG), derived from XRD, are 9 and 17 nm, respectively. The scanning electron microscopic (SEM) images show the spherical shape of Bi 2 O 3 -TiO 2 (T-80) and the composites are polycrystalline. The diffuse reflectance spectra (DRS) of the composites display faint absorption of visible light and strong absorption in UV-A region. The photoluminescence (PL) spectra of both the composites are similar and the observed near band gap emission (NBE) and deep level emission (DLE) agree with those of TiO 2 . The impedance spectra show that the charge-transfer resistances of the composites do not differ significantly. The visible light photoimpedance spectra display the photoconductance of Bi 2 O 3 -TiO 2 (PVP-PEG) but not that of Bi 2 O 3 -TiO 2 (T-80). Although the visible light-photocatalytic activities of the two nanocomposites to degrade dye do not differ significantly Bi 2 O 3 -TiO 2 (T-80) under UV-A light degrades dyes faster than Bi 2 O 3 -TiO 2 (PVP-PEG)." @default.
• W2247106786 created "2016-06-24" @default.
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• W2247106786 date "2012-02-01" @default.
• W2247106786 modified "2023-09-27" @default.
• W2247106786 title "Photocatalytic Activity of Sol-Gel Derived Bi₂O₃-TiO₂ Nanocomposite" @default.
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• W2247106786 doi "https://doi.org/10.4028/www.scientific.net/msf.712.73" @default.
• W2247106786 hasPublicationYear "2012" @default.
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