ZIF-8@PAN纳米纤维膜基多孔碳材料的制备及对镉离子的吸附性能

Preparation and Cadmium Ion Adsorption Properties of ZIF-8@ Polyacrylonitrile Nanofiber Membrane Based Porous Carbon

主要将通过磁控溅射技术制备所得的氧化锌@聚丙烯腈(ZnO@PAN)静电纺丝纳米纤维膜材料,利用溶剂热反应合成金属有机框架材料ZIF-8@聚丙烯腈(ZIF-8@PAN)纳米纤维膜材料,后经过900℃高温煅烧工序制备ZIF-8@PAN纳米纤维膜基多孔碳材料,并将其应用于水体中重金属离子镉的吸附。X射线衍射、红外光谱、扫描电镜分析表征结果表明,ZIF-8成功地在PAN纳米纤维膜上原位生长,经过高温煅烧,ZIF-8的结构并未明显改变。ZIF-8@PAN纳米纤维膜基多孔碳材料在水溶液中对镉离子具有良好的吸附效果。探究证明,吸附过程中,在溶液为中性条件下,且水浴加热35℃时,镉离子吸附效果最好,吸附效率最高可达到88%左右。

Zinc oxide@polyacrylonitrile(ZnO@PAN) electrospinning nanofiber membrane materials were firstly prepared by magnetron sputtering technology. Then, zeolitic imidazolate framework@polyacrylonitrile(ZIF-8@PAN) nanofiber membrane materials were synthesized via solvothermal reaction. After that, the ZIF-8@PAN nanometer fiber membrane-based porous carbon materials were prepared through a 900 ℃ high temperature calcination process, and applied to the adsorption of heavy metal cadmium ions in water. The structure and morphologies of ZIF-8@PAN nanofiber membrane materials were characterized by XRD, FT-IR, SEM. The results show that ZIF-8 was successfully grown in situ on PAN nanofiber membrane, and the structure of ZIF-8 does not change significantly after calcination. The adsorption performance of ZIF-8@PAN nanofiber membrane-based porous carbon materials for heavy metal cadmium ions was evaluated. It is found that in the adsorption process, ZIF-8@PAN nanofiber membrane-based porous carbon materials have the good adsorption of cadmium ions in aqueous solution under the condition of neutral solution. The adsorption efficiency of cadmium ion can reach to 88% when the water bath temperature is 35 ℃.