PHOTOCATALYTIC DEGRADATION OF RHODAMINE B USING Ag NANO DOPED TiO2 PREPARED BY -IRRADIATION METHOD

Vo Thi Thu Nhu, Nguyen Ngoc Duy, Huynh Nguyen Anh Tuan, Nguyen Pham Tu Ngan, Do Quang Minh, Nguyen Quoc Hien

Abstract


Ag nano deposited on TiO2 (Degussa P25) (Ag nano/TiO2) photo-catalyst has been synthesized by g-irradiation method. The  characteristics  of  Ag nano/TiO2 material  has  been  investigated  by BET surface area, X-ray diffraction (XRD), transmission electron microscopy (TEM) and the diffuse reflectance spectra (DRS). The photo-catalytic properties of Ag nano/TiO2 for degradation of Rhodamine B in aqueous solution under visible light have been studied. Results indicated that Ag nano/TiO2 photo-catalyst exhibited better photo-catalytic activity compared to that of TiO2 under the same reaction condition. The higher activity of Ag nano/TiO2 is due the enhancement of electron–hole separation effect on the surface of the catalyst. At 1.5% Ag doping content, the Ag nano/ TiO2 photo-catalyst exhibited the highest photo-catalytic activity under visible light.


Keywords


Keywords: TiO2, Ag nano, photo-catalyst, g-irradiation, Rhodamine B



DOI: https://doi.org/10.15625/0866-708X/54/4/7201 Display counter: Abstract : 210 views.

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Bioteknologi Agrikultur

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Published by Vietnam Academy of Science and Technology