Ultrafast and simultaneous removal of anionic and cationic dyes by nanodiamond/UiO-66 hybrid nanocomposite

Molavi, H ; Sharif University of Technology | 2020

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  1. Type of Document: Article
  2. DOI: 10.1016/j.chemosphere.2020.125882
  3. Publisher: Elsevier Ltd , 2020
  4. Abstract:
  5. In this research, UiO-66 and its composite nanoparticles with thermally oxidized nanodiamond (OND) were synthesized via a simple solvothermal method and utilized as solid adsorbent for the removal of anionic methyl red (MR) dye and cationic malachite green (MG) dye from contaminated water. The synthesized adsorbents were analyzed by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), thermogravimetric analysis (TGA), N2 adsorption–desorption, and zeta potential analyzer. The influences of various factors such as initial concentrations of the dyes, adsorption process time, solution pH, solution temperature and ionic strength on adsorption behavior of MR dye onto OND-UiO hybrid nanoparticle were investigated. The adsorption of MR onto OND-UiO hybrid nanoparticle could be well described by Langmuir isotherm model. Meanwhile, pseudo-second order kinetic model was found to be suitable for illustration of adsorption kinetics of MR onto OND-UiO. Thermodynamic investigation suggested that the adsorption process was spontaneous and endothermic, and controlled by an entropy change instead of enthalpy effect. The experimental adsorption results indicated that OND-UiO hybrid nanoparticle could simultaneously adsorb 59% of MR and 43% of MG from the mixture of both dyes in only 2 min showing synergistic effect compared with single UiO-66 and OND nanoparticles in terms of adsorption rate and removal capacity of anionic dyes. The appropriate removal efficiency, rapid adsorption kinetic, high water stability, and good reusability make OND-UiO hybrid nanoparticle attractive candidate for simultaneously removal of both anionic MR and cationic MG dyes from wastewater. © 2020 Elsevier Ltd
  6. Keywords:
  7. Composite nanoparticle ; Metal-organic framework ; Nanodiamond ; UiO-66 ; Composite materials ; Field emission microscopes ; Fourier transform infrared spectroscopy ; Ionic strength ; Isotherms ; Kinetics ; Metal nanoparticles ; Metal-organic frameworks ; Organometallics ; Reusability ; Scanning electron microscopy ; Synthesis (chemical) ; Thermogravimetric analysis ; Water pollution ; Anionic and cationic dyes ; Composite nanoparticles ; Dye removal ; Field emission scanning electron microscopy ; Pseudo-second-order kinetic models ; Thermodynamic investigation ; Zeta potential analyzers ; Stripping (dyes) ; Adsorbent ; Malachite green ; Metal organic framework ; Methyl red ; Nanocomposite ; Unclassified drug ; Anion ; Azo compound ; Cation ; Coloring agent ; Fuchsine ; Diamond ; Dye ; Ion exchange ; Isotherm ; Malachite ; Nanoparticle ; Pollutant removal ; Reaction kinetics ; Temperature profile ; Adsorption kinetics ; Body weight loss ; Crystal structure ; Desorption ; Enthalpy ; Entropy ; Hybrid ; Particle size ; pH ; Porosity ; Synthesis ; Thermogravimetry ; X ray diffraction ; Zeta potential ; Chemistry ; Procedures ; Sewage ; Water pollutant ; Adsorption ; Anions ; Azo compounds ; Cations ; Coloring agents ; Nanocomposites ; Nanodiamonds ; Rosaniline dyes ; Thermodynamics ; Waste disposal, fluid ; Waste water ; Water ; Water pollutants, chemical ; X-Ray diffraction
  8. Source: Chemosphere ; Volume 247 , May , 2020
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0045653520300746