【摘要】 以石墨烯、石墨粉、碳纳米管等材料为碳源,采用静电纺丝技术,随后经稳定和碳化过程,制备得到3种不同的碳纳米纤维。研究了碳纳米纤维在不同吸附条件下对铬离子的吸附性能。结果表明,碳纳米管纳米纤维表面粗糙度大且其石墨化程度最好,晶体结构更有序,比表面积也最高,这一特点有利于增大吸附材料对铬离子的吸附性能;在pH=3,温度为25℃时,碳纳米管纳米纤维对Cr(VI)的吸附量能达到52.8 mg/g。且循环使用5次后,其吸附率能达到初次吸附的60%,碳纳米管纳米纤维表现出最好的吸附性能。更多还原

【Abstract】 Carbon nanofibers were produced using graphene,graphite powder and carbon nanotubes as carbon sources by nozzle-less electrospinning followed by stabilization and carbonization process.The adsorption performance of carbon nanofibers to Cr(VI) ions under different test conditions was studied.It is found that carbon nanotubes-based nanofibers exhibit a large surface roughness,the best degree of graphitization,more ordered crystal structure,and the largest specific surface areas,which help to increase the adsorption performance of adsorbent materials to Cr(VI) ions.The adsorption capacity to Cr(VI) ions can reach 52.8 mg/g at pH=3,and T=25℃.Moreover,the adsorption capacity can be about 60% of the initial adsorption capacity after five cycles.更多还原