An electrospun nanofibrous composite mat was prepared from polyacrylonitrile yarn waste and graphene oxide. The physical and chemical properties of the nanofibrous composites were characterized using attenuated total reflections Fourier transform infrared, scanning electron microscopy, X-ray diffractometer, and TGA studies. The mean fiber diameters of the pristine polyacrylonitrile yarn waste nanofiber, polyacrylonitrile yarn waste/0.5 wt% graphene oxide, polyacrylonitrile yarn waste/1.0 wt% graphene oxide, and polyacrylonitrile yarn waste/1.5 wt% graphene oxide nanofibrous composites were in the range of 41-50, 31-40, 31-40, and 31-40 nm, respectively. The mean pore sizes of the polyacrylonitrile yarn waste nanofiber, polyacrylonitrile yarn waste/0.5 wt% graphene oxide, polyacrylonitrile yarn waste/1.0 wt% graphene oxide, and polyacrylonitrile yarn waste/1.5 wt% graphene oxide nanofibrous composites were 0.5541, 0.4533, 0.4229, and 0.4168 lm, respectively. The maximum dye removal efficiency was attained in the polyacrylonitrile yarn waste/1.5 wt% graphene oxide composite at basic pH.

Polyacrylonitrile yarn hard waste and multiwall carbon nano-tubes nanofibrous mat was prepared by the electrospinning technique. The nanofibrous composite mats were characterized using thermo-gravimetric analysis, Fourier transform infrared spectroscopy, FT-Raman, scanning electron microscopy, and X-ray diffraction. Adsorption studies were conducted with various physical and chemical parameters such as contact time, solution pH and initial dye concentration. The maximum methylene blue dye removal efficiency of nanofibrous composite was found to be 73.4%at optimized pH 10. The pseudo-second order kinetics and Freundlich isotherm are suitable for methylene blue dye adsorption of nanofibrous composite.

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