【摘要】 采用对PVDF膜载体亲水化处理后涂敷方法和直接原位聚合方法制备不同的PVDF膜载纳米Pd/Fe双金属催化剂,通过扫描电镜(SEM)对膜的表面形态进行表征结果表明,亲水化处理与交联处理影响了复合膜上纳米钯/铁双金属颗粒的分散状态,膜载铁量的测定进一步证明,经过亲水化处理涂敷方法比原位聚合方法在载铁量上更具有优势,不同膜对一氯乙酸脱氯研究表明,Pd/Fe还原膜对微量一氯乙酸均具有一定的降解能力,相比原位聚合工艺的降解率60.5%,涂敷方法降解率可达77%.就本实验条件对比发现,浸涂工艺具有一定的实际应用前景,经改性后的PVDF膜载纳米Pd/Fe双金属体系对于降解含氯有机物也具有一定的实用价值.更多还原

【Abstract】 In this paper,two kinds of modified PVDF membrane-immobilized Pd/Fe nanoparticles by hydrophilization dip-coating method,in situ method respectively are prepared and characterized,two kinds of modified PVDF membrane-immobilized Pd/Fe nanoparticles are used to dechlorinate monochloroacetic acid,the morphology of membrane-immobilized Pd/Fe by scanning electron microscope (SEM) is characterized. Through the research,it is found that the distribution of Pd/Fe nanoparticles is best and the dechlorination effect of monochloracetic acid is the highest in hydrophilization PVDF membrane-immobilized Pd/Fe nanoparticles. Compares to in situ process of the degradation rate of 60.5%,degradation rate of hydrophilization dip-coating method is up to 77%.Modified PVDF membrane-immobilized Pd/Fe nanoparticles by hydrophilization dip-coating method for the degradation of chlorine-containing organic compounds also have some practical value.更多还原