Preparation of a novel PAN/cellulose acetate-Ag based activated carbon nanofiber and its adsorption performance for low-concentration SO2
来源期刊：International Journal of Minerals Metallurgy and Materials2015年第4期
论文作者：Yan-bo Wu Jun Bi Ting Lou Tie-ben Song Hong-quan Yu
文章页码：437 - 445
摘 要：Polyacrylonitrile（PAN）, PAN/cellulose acetate（CA）, and PAN/CA-Ag based activated carbon nanofiber（ACNF） were prepared using electrostatic spinning and further heat treatment. Thermogravimetry–differential scanning calorimetry（TG–DSC） analysis indicated that the addition of CA or Ag did not have a significant impact on the thermal decomposition of PAN materials but the yields of fibers could be improved. Scanning electron microscopy（SEM） analysis showed that the micromorphologies of produced fibers were greatly influenced by the viscosity and conductivity of precursor solutions. Fourier transform infrared spectroscopy（FT-IR） analysis proved that a cyclized or trapezoidal structure could form and the carbon scaffold composed of C=C bonds appeared in the PAN-based ACNFs. The characteristic diffraction peaks in X-ray diffraction（XRD） spectra were the evidence of a turbostratic structure and silver existed in the PAN/CA-Ag based ACNF. Brunner–Emmett–Teller（BET） analysis showed that the doping of CA and Ag increased surface area and micropore volume of fibers; particularly, PAN/CA-Ag based ACNF exhibited the best porosity feature. Furthermore, SO2 adsorption experiments indicated that all the three fibers had good adsorption effects on lower concentrations of SO2 at room temperature; especially, the PAN/CA-Ag based ACNF showed the best adsorption performance, and it may be one of the most promising adsorbents used in the fields of chemical industry and environment protection.
Yan-bo Wu，Jun Bi，Ting Lou，Tie-ben Song，Hong-quan Yu
School of Environmental and Chemical Engineering, Dalian Jiaotong University
摘 要：Polyacrylonitrile（PAN）, PAN/cellulose acetate（CA）, and PAN/CA-Ag based activated carbon nanofiber（ACNF） were prepared using electrostatic spinning and further heat treatment. Thermogravimetry–differential scanning calorimetry（TG–DSC） analysis indicated that the addition of CA or Ag did not have a significant impact on the thermal decomposition of PAN materials but the yields of fibers could be improved. Scanning electron microscopy（SEM） analysis showed that the micromorphologies of produced fibers were greatly influenced by the viscosity and conductivity of precursor solutions. Fourier transform infrared spectroscopy（FT-IR） analysis proved that a cyclized or trapezoidal structure could form and the carbon scaffold composed of C=C bonds appeared in the PAN-based ACNFs. The characteristic diffraction peaks in X-ray diffraction（XRD） spectra were the evidence of a turbostratic structure and silver existed in the PAN/CA-Ag based ACNF. Brunner–Emmett–Teller（BET） analysis showed that the doping of CA and Ag increased surface area and micropore volume of fibers; particularly, PAN/CA-Ag based ACNF exhibited the best porosity feature. Furthermore, SO2 adsorption experiments indicated that all the three fibers had good adsorption effects on lower concentrations of SO2 at room temperature; especially, the PAN/CA-Ag based ACNF showed the best adsorption performance, and it may be one of the most promising adsorbents used in the fields of chemical industry and environment protection.
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