Sorption of Ag+, Cu2+ on Thiol-Functionalized Poly (Acrylic Acid)/SiO2 Composite Nanofiber Membranes

Ran Xu; Min Jia; Feng Ting Li

doi:10.4028/www.scientific.net/AMR.356-360.488

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 356-360Sorption of Ag+, Cu2+ on Thiol-Functionalized Poly...

Sorption of Ag⁺, Cu²⁺ on Thiol-Functionalized Poly (Acrylic Acid)/SiO₂ Composite Nanofiber Membranes

Abstract:

Thiol-functionalized poly (acrylic acid)/SiO₂ (PAA/SiO₂) composite nanofiber membranes have been fabricated by a sol-gel electrospinning method and their adsorption capacity for Ag⁺, Cu²⁺ was investigated. Results showed the PAA/SiO₂ fibers had a diameter between 300 nm-700 nm. FTIR results demonstrated that the mercapto groups have been introduced into the silica skeleton. The adsorption of Ag⁺, Cu²⁺ on the membranes fit the Redlich-Peterson isotherm model best. The equilibrium adsorption capacity of Ag⁺ (575.64 mg/g) on PAA/SiO₂ nanofiber membranes is higher than Cu²⁺ (331.52 mg/g). The desorption rate reached 98% in 30 min. The removal rate of Ag⁺, Cu²⁺ still maintained above 75% after six regeneration cycles. Adsorption kinetics of Ag⁺, Cu²⁺ followed a pseudo-second-order model.

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Periodical:

Advanced Materials Research (Volumes 356-360)

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488-492

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https://doi.org/10.4028/www.scientific.net/AMR.356-360.488

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Online since:

October 2011

Authors:

Ran Xu, Min Jia, Feng Ting Li

Keywords:

Heavy Metal, Mesoporous Material, Nanofiber, Poly(Acrylic Acid), Silicon Dioxide

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