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The immobilization of photocatalyst in polymer fibers has been found to improve photodegradation of dye and recyclability of material. In this study, porous polylactic acid (PLA) fibers were utilized as photocatalyst support using electrospinning technique to synthesis the fibers. The cadmium sulfide (CdS) was embedded in fibers at the amount of wt%, wt%, and wt% as photocatalyst agent with absorption in visible light range. The electrospun fibers experienced increasing in diameter for. times (from nm to nm), due to incorporation of CdS. The synthesized CdS has band gap of. eV, and its presence in composite fibers can be detected by using energy dispersive X-ray (EDX) and X-ray diffraction (XRD) analyses. The photodegradation was performed under low-powered halogen lamp, with % removal of methylene blue (MB) after hours of irradiation using CdS(wt%)/PLA fibers. This result shows higher performance in comparison with PLA and CdS which could only remove % and % of MB, respectively. The recyclability of composite was tested with satisfying performance; with around % of MB removal was maintained after five times of recycle experiments.

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Electrospun polylactic acid/ tungsten oxide/ amino-functionalized carbon quantum dots (PLA/WO3/N-CQDs) fibers for oil/water separation and photocatalytic decolorization (2021)