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Efficiency of Zinc Stannate/Multi-Walled Carbon Nanotubes As the Nanocompositphotocatalyst in the Removal of Methylene Blue From Aqueous Solutions Publisher



Karimi H1, 2 ; Taherkhani S3 ; Pourzamani H2 ; Fathi N1 ; Khajeh M1
Authors
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Authors Affiliations
  1. 1. Student Research Committee, Isfahan University of Medical Sciences, Isfahan, Iran
  2. 2. Department of Environmental Health Engineering, School of Public Health, Isfahan University of Medical Sciences, Isfahan, Iran
  3. 3. Department of Chemistry, Faculty of Science, University of Zanjan, Zanjan, Iran

Source: Desalination and Water Treatment Published:2019


Abstract

In the present study, the use of synthesized zinc stannate/multi-walled carbon nanotubes (ZSC) nanocomposite was investigated as the photocatalyst in the removal of methylene blue (MB) under visible light. The ZSC nanocomposite was synthesized by the hydrothermal method. The structural properties of the synthesized nanocomposite were investigated by X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), and UV-visible diffuse reflectance spectroscopy (DRS). The optimal values of parameters for the removal of the dye were as follows: 130 mg·L–1photocatalyst dosage, 10 mg·L–1dye concentration, pH = 9, and 10 cm distance of radiation source. In this condition, the removal degree was 94%. The photocatalytic removal of dye was followed by pseudo-first-order kinetic and Langmuir-Hinshelwood kinetic models. Furthermore, the values of the equilibrium constant of adsorption (Kads )and the rate constant of the surface reaction (kc ) were obtained as 0.91 L·mg–1 and 0.84 mg·L–1·min –1, respectively. © 2019 Desalination Publications. All rights reserved.
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