Sciences & technologie. A, sciences exactes
Volume 0, Numéro 39, Pages 9-22
2014-06-30

Preparation And Characterization Of P-n Heterojunction Cubi2o4/ceo2 And Its Photocatalytic Activities Under Uva Light Irradiation

Authors : Elaziouti A . Laouedj N . Bekka A . Vannier Rn .

Abstract

CuBi2O4/CeO2 composite materials were synthesized by solid state method and were characterized by a number of techniques such as X-ray diffraction, scanning electron microscopy and UV–Vis diffuse reflectance spectroscopy. The photocatalytic activity of the materials was investigated under UVA light and assessed using Congo red (CR) dye as probe reaction. The CuBi2O4/CeO2 photocatalyst exhibited the high efficiency as a result of 83.05% of decomposition of CR for 100 min of irradiation time with 30 wt % of CuBi2O4 at room temperature and a pH 7. The photodegradation reactions were satisfactory correlated with the pseudo-first-order kinetic model. The mechanism of the enhanced photocatalytic efficiency was explained by the heterojunction charge separation model.

Keywords

CuBi2O4/CeO2 heterojunction, Congo red, photocatalytic activity, synergy effect.

Enhancement Of Photocatalytic Reduction Of Cr(vi) Using The Hetero-system Nial2o4/zno Under Visible Light

Bouallouche, R. .  Kebir M. .  Nasrallah N. .  Hachemi M. .  Amrane A. .  Trari M. . 
pages 1094-1103.


Etude Par Dft+u De L’interaction Ni-ceo2

Chafi Z .  Ouafek N .  Boudjennad E .  Keghouche N .  Mino C . 
pages 15-20.


Photodegradation Of C.i. Acid Yellow 23 Using Immobilized ‎zno Under Sunlight Irradiation

Aoudjit L .  Madjene‎ F .  Lebik‎ H .  Boutra B .  Sebti‎ A .  Igoud S . 
pages 64-69.