制备聚酰胺酸前驱溶液,利用高压静电纺丝法制备聚酰胺酸电纺纤维,再通过热胺化过程得到聚酰亚胺(PI)超细纤维膜。以PI超细纤维膜为载体,采用溶液沉淀法和水热合成法在其表面负载ZIF-8纳米粒子,控制反应条件制备纳米颗粒或纳米盘状的ZIF-8@PI纤维纳米复合膜光催化剂。采用扫描电子显微镜、X射线衍射等进行表征,结果显示以PI超细纤维为载体和模板剂,ZIF-8纳米材料可以均匀、无团聚和较高负载量于PI超细纤维表面。对ZIF-8@PI纤维纳米复合膜进行光催化降解水中有机染料的研究,结果显示纳米盘状ZIF-8@PI超细纤维膜具有较高的光催化效率(99.8%)和光催化降解速率(0.57mg/h·cm2)。
Polyamic acid precursor was prepared for electrospinning,then the polymaic acid electrospun fibers mats were obtained by using electrospinning method.A polyimide (PI) ultrafine fibers mats was prepared by thermal imidization process.ZIF-8 nanoparticles/plates were deposited on the surface by solution synthesis and hydrothermal synthesis method,so ZIF-8@PI fibers nanocomposites photocatalyst can be obtained.The samples were characterized by scanning electron microscopy,X ray diffraction.Using the PI fibers as template and carrier,ZIF-8 nano-particles/plates with uniform,less agglomeration and high loading can be loaded on the surface of PI fibers.The photocatalyst performance of ZIF-8@PI fibers nanocomposites membrane was investigated by the degradation of organic dyes in water,the results shown that tbe membrane possessed high photocatalyst efficiency (99.8%) and photocatalytic degradation rate(0.57mg·cm-2·h-1).
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基金资助
辽宁省大学生创新创业训练计划项目(201910167192,201910167082);辽宁省自然科学基金(0518XN011,0519BS014);国家重点研发计划资助(2020YFF0413818)
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