聚偏氟乙烯/聚甲基丙烯酸甲酯膜的制备及其在含氮废水降解中的应用

PREPARATION OF POLYVINYLIDENE FLUORIDE/POLYMETHYL METHACRYLATE HYBRID MEMBRANE AND ITS APPLICATION IN CATALYTIC DEGRADATION OF NITROGEN-CONTAINING WASTEWATER

将Pd和Ag纳米粒子固定在聚偏氟乙烯(PVDF)/聚甲基丙烯酸甲酯(PMMA)共混膜上制备了杂化膜,将其用于催化还原对硝基苯酚,研究了PMMA含量和温度对膜催化性能的影响,并考察了催化膜的重复使用性能。结果表明:此杂化膜动力学曲线为一条直线,符合准一级反应动力学模型,杂化膜实现了对对硝基苯酚的加氢还原反应的催化作用,随着温度的升高,反应速率越快。说明此膜对于对硝基苯酚的还原催化能力随温度的升高不断加强,实现了对硝基苯酚的加氢还原反应的催化作用,催化效率良好,并具有良好的重复使用性能。

A hybrid membrane was prepared by fixing Pd and Ag nanoparticles on a polyvinylidene fluoride(PVDF)/polymethyl methacrylate(PMMA)blend membrane,and the prepared hybrid membrane was used for catalytic reduction of paranitrate Based phenol,the effects of PMMA content and reaction temperature on the catalytic performance of the membrane were investigated,and the reusability of the catalytic membrane was investigated.The results show that the kinetic curve of the hybrid membrane is a straight line,which conforms to the quasi-first-order reaction kinetic model.The hybrid membrane realizes the catalytic effect of the p-nitrophenol hydroreduction reaction.As the temperature increases,the straight line The slope of is increasing,the faster the reaction rate.It shows that the reduction catalytic efficiency of the hybrid membrane for p-nitrophenol is continuously enhanced with the increase of temperature.The hybrid membrane realizes the catalytic effect of the hydrogenation reduction reaction of p-nitrophenol,and the catalytic efficiency is good.After the catalytic membrane was recycled for 8 times,the hybrid membrane had good reuse performance,indicating that the loading of Pd and Ag nanoparticles on the blend membrane was relatively stable.