Preparation and characterization of Pd/Fe bimetallic nanoparticles immobilized on Al2O3/PVDF membrane: Parameter optimization and dechlorination of dichloroacetic acid

J Environ Sci (China). 2015 May 1:31:194-202. doi: 10.1016/j.jes.2014.12.009. Epub 2015 Mar 30.

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.

Keywords: Dichloroacetic acid; Matrix modified; Nano-sized Al(2)O(3) particles; PVDF membrane; Pd/Fe nanoparticles.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aluminum Oxide / chemistry*
  • Dichloroacetic Acid / chemistry
  • Iron / chemistry*
  • Membranes, Artificial
  • Metal Nanoparticles / chemistry*
  • Microscopy, Electron, Scanning
  • Microscopy, Electron, Transmission
  • Molecular Structure
  • Palladium / chemistry*
  • Polyvinyls / chemistry*

Substances

  • Membranes, Artificial
  • Polyvinyls
  • polyvinylidene fluoride
  • Palladium
  • Dichloroacetic Acid
  • Iron
  • Aluminum Oxide