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        Electrospun Porous Polylactic Acid Fibers Containing CdS for Degradation of Methylene Blue

        Chit Seng Ho,Nur Hafizah Zainal Abidin,Muhammad Wahyu Nugraha,Nonni Soraya Sambudi,Fathilah Ali,MOHD Dzul Hakim Wirzal,Laksmi Dewi Kasmiarno,Sarah Amalina Adli 한국섬유공학회 2020 Fibers and polymers Vol.21 No.6

        The immobilization of photocatalyst in polymer fibers has been found to improve photodegradation of dye andrecyclability of material. In this study, porous polylactic acid (PLA) fibers were utilized as photocatalyst support usingelectrospinning technique to synthesis the fibers. The cadmium sulfide (CdS) was embedded in fibers at the amount of1 wt%, 3 wt%, and 5 wt% as photocatalyst agent with absorption in visible light range. The electrospun fibers experiencedincreasing in diameter for 2.6 times (from 175 nm to 450 nm), due to incorporation of CdS. The synthesized CdS has bandgap of 2.35 eV, and its presence in composite fibers can be detected by using energy dispersive X-ray (EDX) and X-raydiffraction (XRD) analyses. The photodegradation was performed under low-powered halogen lamp, with 90 % removal ofmethylene blue (MB) after 10 hours of irradiation using CdS(3 wt%)/PLA fibers. This result shows higher performance incomparison with PLA and CdS which could only remove 57 % and 65 % of MB, respectively. The recyclability of compositewas tested with satisfying performance; with around 60 % of MB removal was maintained after five times of recycleexperiments.

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