Ag Nanoparticles Dispersion on Surface-Modified Al Alloy Porous Body and Their Filtration Properties

Abstract

For the water purification and anti-bacterial filters, the combination of the enlarged specific surface area and anti-microbial material is necessary for the filtration efficiency. Because the pore surface acts as an adsorption site with impurities and the anti-microbial material, such as silver nanoparticle, suppresses the proliferation of bacteria. Silver nanoparticle dispersed Al-4wt.% Cu porous body was manufactured by the following manner. The granulated powder was fabricated by low energy ball mill and was compacted under the pressure of 20 MPa for macropore network. After sintering, the sintered body was surface-modified in dilute alkali solution for microporous surface. Subsequently, the surface-modified porous body was immersed in the solution that was synthesizing Ag nanoparticles by polyol process. The scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were employed to investigate the microstructure and phase confirmation. Permeability and filtration characteristics evaluated by specially manufactured device using pure water and artificial waste water.