Synthesis and efficacy of PPy/CS/GO nanocomposites for adsorption of ponceau 4R dye
| Autor: | Beshoy T. Nasr, Rehab G. El Sharkawy, HosnyA. EL-Daly, NehalA. Salahuddin |
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| Rok vydání: | 2018 |
| Předmět: |
Thermogravimetric analysis
Materials science Nanocomposite Polymers and Plastics Graphene Organic Chemistry Enthalpy Langmuir adsorption model 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Polypyrrole 01 natural sciences Ponceau 4R 0104 chemical sciences law.invention chemistry.chemical_compound symbols.namesake Adsorption chemistry law Materials Chemistry symbols 0210 nano-technology Nuclear chemistry |
| Zdroj: | Polymer. 146:291-303 |
| ISSN: | 0032-3861 |
| DOI: | 10.1016/j.polymer.2018.04.053 |
| Popis: | Polypyrrole/Chitosan/Graphene oxide (PPy/CS/GO) exfoliated nanocomposite was prepared by in-situ polymerization of pyrrole in the presence of intercalated Chitosan/Graphene oxide nanocomposite (CS/GO). The nanocomposites were characterized by thermogravimetric analysis (TGA), Fourier Transform Infrared (FT-IR) spectroscopy, X-ray diffraction, Scanning electron microscope and Transmission electron microscope. The adsorption behavior of PPy/CS/GO was examined using Ponceau 4 R dye (P4R) and the adsorption capacity was compared with GO, CS and CS/GO intercalated nanocomposite. Effect of dye concentration, adsorbent amount, pH, temperature, salt concentration on dye adsorption was studied and adsorbent reproducibility was deliberated. Adsorption of P4R onto PPy/CS/GO nanocomposite was better than CS, GO or CS/GO nanocomposite. The adsorption kinetics of P4R onto PPy/CS/GO nanocomposite could be represented by pseudo-second-order kinetic and the adsorption isotherm obeyed Langmuir isotherm model. Thermodynamic parameters, The Gipps free energy (ΔG), enthalpy (ΔH) and entropy (ΔS) were calculated showing that the adsorption of the dye was spontaneous and endothermic. |
| Databáze: | OpenAIRE |
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