Adsorption of methylene blue onto chitosan-montmorillonite/polyaniline nanocomposite

0539577 - ÚMCH 2022 RIV NL eng J - Journal Article
Minisy, Islam M. - Salahuddin, N. A. - Ayad, M. M.
Adsorption of methylene blue onto chitosan-montmorillonite/polyaniline nanocomposite.
Applied Clay Science. Roč. 203, 15 March (2021), č. článku 105993. ISSN 0169-1317. E-ISSN 1872-9053
Institutional support: RVO:61389013
Keywords : chitosan * polyaniline * montmorillonite
OECD category: Polymer science
Impact factor: 5.907, year: 2021
Method of publishing: Limited access
https://www.sciencedirect.com/science/article/pii/S016913172100017X?via%3Dihub

Eco-friendly adsorbent of chitosan–montmorillonite/polyaniline (CH–Mt/PANI) nanocomposite was synthesized by the intercalation of CH into Mt through ion-exchange process followed by the impregnation of aniline. Then in-situ polymerization of aniline using ammonium peroxydisulfate as an oxidant yielded a conducting polymer, polyaniline, as an additional component. The composite with polyaniline salt was also converted to corresponding CH–Mt/PANI base nanocomposite. The composites were characterized by Fourier transform infrared spectroscopy, X-ray diffractometry, thermal gravimetric analysis and electron microscopy and subsequently used for the removal of methylene blue from aqueous solutions. The composite with polyaniline base proved to be better dye adsorbent than that with polyaniline salt and was therefore investigated in detail. The adsorption of the dye onto CH–Mt/PANI base nanocomposite follows the pseudo second-order kinetics and it is well described by Temkin isotherm model. Moreover, the intraparticle diffusion was found to play a significant role in the adsorption mechanism. The maximum adsorption capacity was estimated to be 111 mg g−1, exceeded the adsorption capacities of the individual precursors.
Permanent Link: http://hdl.handle.net/11104/0317803