Document Type : Main File (First File)

Author

• F. Farzaneh

Department of Chemistry, Faculty of Sciences, Alzahra University, P.O. Box1993891176 Vanak, Tehran, Islamic Republic of Iran

Abstract

Hydrothermal synthesis of nickel-chitosan hybrid  has  been accomplished using Ni(CH₃COO)₂,4H₂O, chitosan and water as starting material, template and solvent respectively, followed by calcination at 800 and 900˚C to provide nanoporous NiO₈₀₀  and NiO₉₀₀. The solid products were characterized by X-ray diffraction (XRD), nitrogen adsorption-desorption, scanning electron microscopy (SEM) and Fourier transform infrared (FT-IR) techniques.  NiO₈₀₀ proved to be active for adsorption of Congo red with pseudo-second order kinetic model and adsorption isotherms, respectively fitted by Freundlich equation. NiO₉₀₀ was also found to successfully catalyze the photodegradation of organic dye pollutants such as Congo red  and methylene blue. The kinetic of photocatalytic behavior of NiO₉₀₀ have proven to obey the first order and Langmuir–Hinshelwood model.

Keywords

• nanoparticles
• Nickel Oxide
• photodegradation
• Adsorption
• Organic dyes