Palladium-Zeolite nanofiber as an effective recyclable catalyst membrane for water treatment. (15th September 2016)

• Record Type: Journal Article
• Authors: Choi, Jungsu; Chan, Sophia; Yip, Garriott; Joo, Hyunjong; Yang, Heejae; Ko, Frank K.
• Is Part Of: Water research. Volume 101(2016)
• Page Start: 46
• Page End: 54
• Publication Date: 2016-09-15
• Subjects: Zeolite -- Palladium -- Nanofiber membrane -- Ammonia adsorption -- Oxidation -- Sustainable; Water -- Pollution -- Research -- Periodicals; 363.7394
• DOI: 10.1016/j.watres.2016.05.051
• Languages: English
• ISSNs: 0043-1354

Abstract

Abstract: Zeolite is an exciting natural material due to its unique capability of ammonium nitrogen (NH3 N) adsorption in water. In this study, multifunctional hybrid composites of zeolite/palladium (Ze/Pd) on polymer nanofiber membranes were fabricated and explored for sustainable contaminant removal. SEM and XRD demonstrated that zeolite and palladium nanoparticles were uniformly distributed and deposited on the nanofibers. NH3 N recovery rate was increased from 23 to 92% when palladium coated zeolite was embedded on the nanofiber. Multifunctional nanofibers of Ze/Pd membranes were able to adsorb NH3 N on the zeolites placed on the surface of fibers and palladium catalysts were capable of selective oxidation of NH3 N to N2 gas. The cycling of NH3 N adsorption-oxidation, high flux, hydrophilicity, and flexibility of the membrane makes it a strong candidate for water treatment. Graphical abstract: Highlights: Zeolite and palladium nanoparticles were uniformly deposited on the nanofibers. Palladium catalysts were capable of selective oxidation of NH3 N to N2 gas. Multifunctional nanofibrous membranes were able to absorb and remove NH3 N. Ze/Pd nanofiber membrane can be recycled and reused for NH3 N removal. Recovery rate of Ze/Pd membranes functions were shown to be 92.2% at 250 °C.