Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.13091/3018
Title: Carbon nanotubes/ polyacrylonitrile composite nanofiber mats for highly efficient dye adsorption
Authors: Yar, Adem
Parlayıcı, Şerife
Keywords: Nanofiber
Polyacrylonitrile
CNT
Electrospinning
Methylene blue
Malachite green
Methyl violet
Dye adsorption
Methylene-Blue
Metal Adsorption
Aqueous-Solution
Removal
Adsorbent
Isotherm
Green
Water
Pollutant
Membranes
Issue Date: 2022
Publisher: Elsevier
Abstract: Nanofibers have unique advantages, such as high porosity and large specific surface area. Therefore, they are promising adsorption materials for the efficient removal of dyes from dyeing effluents. However, regulating adsorption properties poses significant challenges. This study incorporated different quantities of carbon nanotubes (CNT) into the polyacrylonitrile (PAN) polymer to fabricate nanofibers to address those challenges. PANnf, CNTs (3 wt%) doped PAN nanofibers (PAN3CNTnf), and CNTs (5 wt%) doped PAN nanofibers (PAN5CNTnf) were used to remove Methylene blue (MB), Malachite green (MG), and Methyl violet (MV) from different concentrations of aqueous solutions. The study examined the effect of pH, temperature, adsorbent material, and time on adsorption capacity, and applied adsorption isotherms. The maximum adsorption capacity (qm) of the dyestuff Langmuir model was 128.21 mg/g for PANnf:MB, 138.89 for PANnf:MG, 88.50 for PANnf:MV, 172.41 for PAN3CNTnf:MB, 212.77 for PAN3CNTnf:MG, 175.44 for PAN3CNTnf:MV, 158.73 for PAN5CNTnf/MB, 188.68 for PAN5CNTnf:MG, and 114.94 for PAN5CNTnf:MV. Adsorption Gibbs free energy, enthalpy, and entropy were also evaluated using adsorption isotherms at various temperatures. The negative Delta G values show that adsorption occurs spontaneously. Pseudo-first-order kinetic (PFOK) and pseudo-second-order kinetic (PSOK) models were employed to determine adsorption kinetics. The results revealed that the PSOK model agreed better with the experimental data. The experimental outcomes showed that PANnf, PAN3CNTnf, and PAN5CNTnf nanofibers were good choices for adsorbing MB, MG, and MV, which shines a light on the fabrication of multifunctional nanofiber for dye applications.
URI: https://doi.org/10.1016/j.colsurfa.2022.129703
https://hdl.handle.net/20.500.13091/3018
ISSN: 0927-7757
1873-4359
Appears in Collections:Mühendislik ve Doğa Bilimleri Fakültesi Koleksiyonu
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collections
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collections

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