Electrospun Bilayer PAN/Chitosan Nanofiber Membranes Incorporated with Metal Oxide Nanoparticles for Heavy Metal Ion Adsorption

Coatings

MohammedR. Karim¹  MuhammedOmer Aijaz¹  MustafaY. Haddad²  AbdulazizK. Assaifan²  HamadF. Alharbi² 

[1] Center of Excellence for Research in Engineering Materials, King Saud University, Riyadh 11421, Saudi Arabia;Mechanical Engineering Department, King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia;

关键词: adsorption;    polyacrylonitrile;    chitosan;    titanium dioxide;    zinc oxide;    nanofibers;    electrospinning;   

DOI  :  10.3390/coatings10030285

来源: DOAJ

【 摘 要 】

Bilayer nanofiber membranes with enhanced adsorption and mechanical properties were produced by combining a layer of polyacrylonitrile (PAN) functionalized with metal oxides (MO) of ZnO or TiO₂ with a layer of chitosan (CS) via consecutive electrospinning. The adsorption properties of the bilayer PAN/MO−CS nanofiber membranes against lead (Pb(II)) and cadmium (Cd(II)) ions were investigated, including the effects of the solution pH, initial ion concentrations, and interaction time. The integration of a CS layer into PAN/MO nanofibers increased the adsorption capacity of lead by 102% and cadmium by 405%, compared to PAN/MO single layer. The nonlinear optimization method showed that the pseudo-second-order kinetic model and Langmuir isotherm equation better described the adsorption results. More importantly, the incorporation of a supportive CS nanofiber layer enhanced the tensile strength of PAN/MO−CS bilayer by approximately 68% compared to the PAN/MO single layer, owing to the strong interaction between the fibers at the interface of the two layers.

【 授权许可】

Unknown