title: Adsorption and photocatalytic degradation of 2-CP in wastewater onto CS/CoFe₂O ₄ nanocomposite synthesized using gamma radiation.
abstract: Photocatalytic degradation of 2-chlorophenol (2-CP) was studied using the photocatalyst chitosane/CoFe2O4 nanocomposite (CS/CF) under visible light. CS/CF nanocomposites were synthesized via gamma irradiation cross-linking method with the aid of sonication. Physical characteristics of CS/CF were studied using infrared spectrophotometer (IR), scanning electron microscopy (SEM), transmission electron microscope (TEM) and ultraviolet-visible (UV-vis) spectroscopy. Their photocatalytic activity was tested for the degradation of 2-CP in aqueous medium using sunlight. The effect of different parameters such as catalyst concentration, 2-CP concentration and reaction pH on degradation was also examined. It was verified that the 2-CP degradation rate fits a pseudo-first-order kinetics for initial 2-CP concentrations between 25 and 100mg/l, at 30°C. The degradation kinetics fit well Langmuir-Hinshelwood rate law. The degradation of (2-CP) follows pseudo-first-order kinetics. Results showed that after the catalyst had been used 5 times repeatedly, the degradation rate was still above 80%.
authors.affiliation: Chemistry Department College of Science and Humanities, Salman bin Abdulaziz University, Alkharj, Saudi Arabia; Polymer Chemistry Department, National Center for Radiation Research and Technology, PO Box No. 29, Nasr city, Cairo 11731, Egypt. Electronic address: abutalib_m@yahoo.com.
authors.forename: Manal F Abou
authors.initials: MFA
authors.lastname: Taleb
mesh_terms: D000327:Adsorption; D002384:Catalysis / Q000528:radiation effects; D048271:Chitosan / Q000737:chemistry* / Q000378:metabolism / Q000528:radiation effects; D003035:Cobalt / Q000737:chemistry* / Q000378:metabolism / Q000528:radiation effects; D005290:Ferric Compounds / Q000737:chemistry* / Q000378:metabolism / Q000528:radiation effects; D005720:Gamma Rays; D053761:Nanocomposites / Q000737:chemistry*; D010782:Photolysis / Q000528:radiation effects; D062065:Wastewater / Q000737:chemistry*
chemical_list: D048271:Chitosan; D003035:Cobalt; D005290:Ferric Compounds; D062065:Wastewater; C001215:ferrite
keywords: 2-Chlorophenol; CoFe(2)O(4); Degradation; Gamma radiation; Photocatalysis