Polyacrylonitrile (PAN) microspheres were prepared by miniemulsion polymerization,which were used as precursors of nitrogen-doped porous carbon materials (NPC).NPC were obtained after impregnation with ZnCl2 and carbonization at 450℃,600℃ and 700℃,which were sequentially identified as NPC-H450,NPC-H600 and NPC-H700.The samples were characterized by transmission electron microscopy (TEM),X-ray photoelectron spectroscopy(XPS) and nitrogen adsorption-desorption.The adsorption properties of CO2 and Cu2+ onto NPC were investigated.The results showed that NPC with high specific surface areas and high nitrogen content were obtained.The specific surface areas of NPC-H450,NPC-H600 and NPC-H700 were 1114m2/g,1644m2/g and 931m2/g,respectively,and the nitrogen contents were 11.33wt%,12.12wt%,13.35wt%,respectively.The as-prepared NPC demonstrated good adsorption properties for CO2 and Cu2+.The adsorption capacity of CO2 onto NPC-450 was 3.40mmol/g at 0℃ and 1 atm.The adsorption capacity of Cu2+ onto NPC-700 was 62.88mg/g at room temperature for 24h.
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基金资助
国家自然科学基金(21044006);安徽省自然科学基金(1408085MKL19)
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