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Cresyl Violet Adsorption on Sonicated Graphite Oxide.

D Coello-Fiallos1, E Cazzanelli2, A Tavolaro3

  • 1Surface Nanoscience Group, Department of Physics, University of Calabria, 87036 Rende, Cosenza, Italy.

Journal of Nanoscience and Nanotechnology
|February 15, 2018
PubMed
Summary
This summary is machine-generated.

Sonicated graphite oxide effectively adsorbs Cresyl Violet (CV), Methylene Blue (MB), and Acridine Orange (AO) dyes from aqueous solutions. Adsorption followed pseudo-second order kinetics, with CV showing the highest adsorption capacity.

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Area of Science:

  • Materials Science
  • Environmental Chemistry
  • Nanotechnology

Background:

  • Graphite oxide (GO) is a promising material for adsorption due to its large surface area and oxygen-containing functional groups.
  • Dye adsorption from wastewater is a critical environmental challenge.
  • Sonication can modify the properties of graphite oxide, potentially enhancing its performance.

Purpose of the Study:

  • To investigate the adsorption performance of sonicated graphite oxide (sGO) for Cresyl Violet (CV) dye.
  • To compare the adsorption of CV with Methylene Blue (MB) and Acridine Orange (AO) on sGO.
  • To characterize the synthesized sGO and determine the adsorption kinetics and capacity for the dyes.

Main Methods:

  • Synthesis of graphite oxide using Tour's method, followed by sonication.
  • Characterization of sGO using Raman, IR, UV-Vis, SEM, and TEM techniques.
  • Adsorption experiments in aqueous solutions with CV, MB, and AO, followed by kinetic modeling (pseudo-second order).

Main Results:

  • The synthesized sGO was characterized, confirming its structure and properties.
  • Adsorption of all three dyes (CV, MB, AO) on sGO followed the pseudo-second order kinetic model.
  • The maximum adsorption capacities were 125.0 mg g-1 for CV, 123.3 mg g-1 for MB, and 94.6 mg g-1 for AO.

Conclusions:

  • Sonicated graphite oxide is an effective adsorbent for removing CV, MB, and AO dyes from aqueous solutions.
  • The adsorption process is well-described by pseudo-second order kinetics.
  • CV exhibits the highest adsorption capacity on sGO among the tested dyes, indicating its potential for dye removal applications.