Nanochemistry
Maryam Movahedi; Akram Hosseinian; Nasrin Nazempour; Mohadeseh Rahimi; Hossein Salavati
Volume 3, Issue 4, pp. 283-387, Serial No. 9 , October 2015, , Pages 374-387
Abstract
In the present work, ZnO/Bi2O3, SnO2/Bi2O3/Bi2O4 mixed oxide, Bi2O3 rod-like and SnO2 nanoparticle have been synthesized. The obtained samples were characterized by field emission scanning electron microscopy (FE-SEM) and X-ray diffraction (XRD). The optical properties of samples were evaluated by UV-Vis ...
Read More
In the present work, ZnO/Bi2O3, SnO2/Bi2O3/Bi2O4 mixed oxide, Bi2O3 rod-like and SnO2 nanoparticle have been synthesized. The obtained samples were characterized by field emission scanning electron microscopy (FE-SEM) and X-ray diffraction (XRD). The optical properties of samples were evaluated by UV-Vis spectrophotometer. The photocatalytic activity of samples was evaluated by decolorization of methylene blue (M.B.) solution. The Present work indicates the improving or hampering effect of Bi2O3 on the photocatalytic activity of ZnO/Bi2O3. The results show that the photocatalytic performance of ZnO/Bi2O3 which is higher than that of Bi2O3, SnO2, and SnO2/Bi2O3/Bi2O4 is related to the presence of the zinc oxide semiconductor. Furthermore, results indicated that the photoactivity of the SnO2/Bi2O3 system was not improved. The present work affirms the importanat position of energy levels and also the separation of photogenerated electron/hole pairs on the efficient photocatalytic performance.
Inorganic chemistry
Maryam Movahedi; Fahimeh Kazemi-Cheryani; Nahid Rasouli; Hossein Salavati
Volume 3, Issue 2, pp. 72-147, Serial No. 7 , April 2015, , Pages 137-142
Abstract
In the present work, the ZnFe2O4 nanoparticle has been successfully synthesized. The obtained sample was characterized by X-ray diffraction (XRD), emission scanning electron microscopy (FE-SEM) and its optical property was examined by UV-Vis spectrophotometer. FE-SEM revealed that the particle size of ...
Read More
In the present work, the ZnFe2O4 nanoparticle has been successfully synthesized. The obtained sample was characterized by X-ray diffraction (XRD), emission scanning electron microscopy (FE-SEM) and its optical property was examined by UV-Vis spectrophotometer. FE-SEM revealed that the particle size of the ZnFe2O4 of about 47 nm was synthesized. The photocatalytic performance under UV-Vis and visible light were evaluated by decolorization of congo red (CR) anionic dye solution. The UV-Vis and visible light irradiation source are a high pressure mercury lamp, 400 W and filament tungsten lamp 100 W respectively. The photocatalytic results show that the ZnFe2O4 sample can be 100% degrading (CR) dye solution after 30 and 120 min under UV-Vis and visible irradiation respectively