Author/Authors :
Soofivand, Faezeh Young Researchers and Elite Club, Bandar Abbas Branch, Islamic Azad University, Bandar Abbas , Sabet, Mohammad Department of Chemistry, Faculty of Science, Vali-e-Asr University of Rafsanjan, Rafsanjan , Seyghalkar, Hamideh Department of Inorganic Chemistry, Faculty of Chemistry, University of Kashan, Kashan , Salavati-Niasari, Masoud Institute of Nano Science and Nano Technology, University of Kashan, Kashan
Abstract :
Cobalt sulfide (CoS2) nanostructures were synthesized via a simple thermal
decomposition method using [Co(oct)2] as a new precursor. Using the
organometallic compound as precursor could synthesize materials in
nano-scale because of having the massive structure that acted as capping
agent. The products were characterized by various analyses such as
X-ray diffraction pattern (XRD), scanning electron microscopy (SEM),
transmission electron microscopy (TEM) and fourier transform infrared
(FT-IR) spectroscopy. Also, the optical properties of this product was
investigated by photoluminescence spectroscopy (PL). However, band gap
of CoS2 nanostructures was estimated about 2.2 eV in this work but CoS2 was
considered as a metallic product in the former work. This difference may
be related to quantum effects in nanomaterials. The photocatalytic activity
of CoS2 nanoparticles was examined by decolorization of Erythrosine as
an organic pollutant under UV irradiation and degradation percent of
this dye was reported about 84 %. According to the kinetics studies, the
photocatalytic reactions are following the Pseudo first-order model.
Keywords :
[Co(oct)2] , CoS2 , Nanostructures , Photocatalyst , Pseudo first-order model; , Thermal Decomposition
