Photocatalytic degradation of sulfur black dye over Ce-TiO2 under UV irradiation: removal efficiency and identification of degraded species

  • Azza Touati
  • Lobna Jlaiel
  • Wahiba NajjarEmail author
  • Sami Sayadi
Original Paper


TiO2 and Ce-TiO2 photocatalysts have been synthesized via sol–gel method and characterized by various techniques. Cerium incorporation maintains anatase phase formation, reduces the band gap energy, and inhibits the electron–hole recombination leading to a better photocatalytic response. Photocatalytic activities are explored on the degradation of sulfur black dye under UV light in the presence of H2O2. Photocatalytic reaction parameters have been assessed. Indeed, sulfur black dye color removal reached 92% at the optimal conditions in presence of 1% Ce-TiO2 catalyst. Identification of degradation products of sulfur black dye was achieved by LC/MS.


Ce-doped TiO2 Photodegradation Sulfur black dye LC/MS analysis 



The authors gratefully acknowledge the Centre de Biotechnologie de Sfax and the Institut Supérieur des Etudes Préparatoires en Biologie Géologie de la Soukra for financial support.


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© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Azza Touati
    • 1
  • Lobna Jlaiel
    • 2
  • Wahiba Najjar
    • 1
    • 3
    Email author
  • Sami Sayadi
    • 2
  1. 1.LR01ES08 Laboratoire de Chimie des Matériaux et Catalyse, Faculté des Sciences de TunisUniversité Tunis El ManarEl Manar TunisTunisia
  2. 2.Laboratoire de Bioprocédés EnvironnementauxCentre de Biotechnologie de SfaxSfaxTunisia
  3. 3.Institut Supérieur des Études Préparatoires en Biologie Géologie-SoukraUniversité de CarthageAmilcar TunisTunisia

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