title: Preparation and characterization of Pd/Fe bimetallic nanoparticles immobilized on Al2O3/PVDF membrane: Parameter optimization and dechlorination of dichloroacetic acid.
abstract: Using a liquid-solid phase inversion method, a hybrid matrix poly(vinylidene fluoride) (PVDF) membrane was prepared with alumina (Al2O3) nanoparticle addition. Pd/Fe nanoparticles (NPs) were successfully immobilized on the Al2O3/PVDF membrane, which was characterized by Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM). The micrographs showed that the Pd/Fe NPs were dispersed homogeneously. Several important experimental parameters were optimized, including the mechanical properties, contact angle and surface area of Al2O3/PVDF composite membranes with different Al2O3 contents. At the same time, the ferrous ion concentration and the effect of hydrophilization were studied. The results showed that the modified Al2O3/PVDF membrane functioned well as a support. The Al2O3/PVDF membrane with immobilized Pd/Fe NPs exhibited high efficiency in terms of dichloroacetic acid (DCAA) dechlorination. Additionally, a reaction pathway for DCAA dechlorination by Pd/Fe NPs immobilized on the Al2O3/PVDF membrane system was proposed.
authors.affiliation: Key Laboratory of Remote Sensing Monitoring of Geographic Environment, College of Heilongjiang Province, Harbin Normal University, Harbin 150025, China. Electronic address: zlj19650205@163.com.
authors.forename: Lijuan
authors.initials: L
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Remote Sensing Monitoring of Geographic Environment, College of Heilongjiang Province, Harbin Normal University, Harbin 150025, China. Electronic address: mengzhaohong1973@163.com.
authors.forename: Zhaohong
authors.initials: Z
authors.lastname: Meng
authors.affiliation: Key Laboratory of Remote Sensing Monitoring of Geographic Environment, College of Heilongjiang Province, Harbin Normal University, Harbin 150025, China.
authors.forename: Shuying
authors.initials: S
authors.lastname: Zang
mesh_terms: D000537:Aluminum Oxide / Q000737:chemistry*; D003999:Dichloroacetic Acid / Q000737:chemistry; D007501:Iron / Q000737:chemistry*; D008567:Membranes, Artificial; D053768:Metal Nanoparticles / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D015394:Molecular Structure; D010165:Palladium / Q000737:chemistry*; D011145:Polyvinyls / Q000737:chemistry*; D005465:Fluorocarbon Polymers
chemical_list: D000537:Aluminum Oxide; D003999:Dichloroacetic Acid; D007501:Iron; D008567:Membranes, Artificial; D010165:Palladium; D011145:Polyvinyls; C024865:polyvinylidene fluoride; D005465:Fluorocarbon Polymers
keywords: Dichloroacetic acid; Matrix modified; Nano-sized Al(2)O(3) particles; PVDF membrane; Pd/Fe nanoparticles