Ceramic Membranes for Filtration Applications — Preparation and Characterization

Abstract

This article gives an overview about the preparation and characterization of asymmetric ceramic membranes that have been developed at our institute within the last years. Depending on the required pore size of the filter active layer for filtration applications ranging from microfiltration (MF) up to nanofiltration (NF) different preparation routes have to be applied.

Dual function filtration and catalytic breakdown of organic pollutants in wastewater using ozonation with titania and alumina membranes

“…The supported membrane could have an even smaller effective pore size due to the capillary forces from the ceramic tube acting on the sol during drying [49]. The polymeric sol-gel route used in this study has demonstrated the ability to produce filtration layers with less than 2 nm pores which have a molecular cut-off < 1,000 Dalton [35]. The water sample use for this study was secondary effluent from one of Melbourne's WWTPs, which contains not only the organic compounds with a molecular weight range of 400-10,000 Daltons as mentioned previously, but also visible particulate contamination.…”

Breathable, water-repellent γ-MnOOH nest production by vapor-assisted conversion

“…Notably, the water flux exceeds that of ceramic nanomembranes. 37,38 Given prior reports that surface polarity in pores larger than 100 nm does not significantly influence solvent transport, 39 the dominant factor governing flux is likely the liquid viscosity. Indeed, the viscosities of water, ethanol, and 2-propanol at 25 1C are 0.92, 1.08, and 2.06 mPa s, respectively.…”

Recent microfluidic advances in submicron to nanoparticle manipulation and separation

“…Ultrafiltration (UF) utilises porous membranes to separate particles based on the membrane pore sizes. 52 The particles are infiltrated through the membrane by applying pressure or centrifugation. 53,54 Particles larger than the cut-off size are trapped on the membrane while smaller particles can pass through it, Fig.…”