Journal Title
Title of Journal: J IRAN CHEM SOC
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Abbravation: Journal of the Iranian Chemical Society
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Publisher
Springer Berlin Heidelberg
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Authors: H R Pouretedal M Kiyani
Publish Date: 2013/07/03
Volume: 11, Issue: 1, Pages: 271-277
Abstract
The nanoparticles of CoO CoS and CoO/CoS composite are synthesized using precipitation method The Xray diffraction UV–Vis absorption spectroscopy energy dispersive Xray spectroscopy scanning electron microscopy and FTIR spectroscopy are used to characterize the prepared nanoparticles The EDX analysis shows the formation of CoO067S033 composite The XRD pattern indicates the hexagonal structure for nanocomposite The formation of Co–O and Co–S bonds is confirmed by FTIR spectra The bandgap energies of 297 306 and 291 eV are obtained from UV–Vis spectra of CoO CoS and CoO/CoS nanoparticles respectively The results of photodegradation of 2nitrophenol show that the photoreactivity order of nanocatalysts is CoO/CoS CoO CoS The pseudo firstorder kinetic rate constants of 64 × 10−3 43 × 10−3 and 122 × 10−3 min−1 are obtained for CoO CoS and CoO/CoS nanoparticles respectively at photodegradation reaction conditions of pH 10 30 mg/L of 2NP and 13 g/L of the catalyst The proposed nanocomposite shows an acceptable reusability and stability against photocorrosion in fourcycle photodegradation experiments
Keywords:
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