Structural Design of Multi-scale Carbon Nanofibers and Its Adsorption Properties to Copper Ions
Carbon nanofibers and carbon nanotubes have broad application prospects in the field of heavy metal ion adsorption due to their ultra-high specific surface area.In this work,the polyacrylonitrile nanofibers were firstly prepared by electrospinning,and the carbon nanofibers were prepared by preoxidation and carbonization.The effects of preoxidation and carbonization on the morphology and structure of nanofibers were studied.Then,based on the plasma assisted vapor deposition process,the carbon nanotubes were grown on the surface of carbon nanofibers,and the evolution of carbon nanotubes structure on the surface of nanofibers under different power was discussed.They were used to adsorb copper ion pollutants,and the effects of pH value of the adsorption solution,the metal ion concentration,and the adsorbent content on the adsorption capacity were discussed.
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