Modified Polyethersulfone Membranes With Photocatalytic Properties

Abstract

Abstract.1 The photocatalityc nanocomposite membranes with tin(IV) oxide nanoparticles were obtained by "layerby-layer" self-assembly. Polyelectrolyte complexes with different nature were analyzed as a binder for nanocatalysts. PEI was used as a positively charged polyelectrolyte, and CMC, sodium alginate, κ-or ι-carrageenans were used as negatively charged ones. The presence of SnO 2 on the membrane surface was confirmed by a scanning electron microscopy (SEM). Polyelectrolyte complexation was studied by zeta-potential measurement. The photocatalytic activity of the nanocomposite membranes was evaluated in the process of milk nanofiltration. The modification of polyethersulfone membranes with polyelectrolyte layers and SnO 2 nanoparticles allowed to produce a highly concentrated retentate and membrane flux remained stable for over 8 h.

1,2,3,4-Tetrahydropyrimidine Derivative for Selective and Fast Uptake of Cadmium Ions from Aqueous Solution

“…Moreover, the major drawbacks of these adsorbents are their low adsorption capacity and their difficulties in separating some of them from water. Recently, special attention has been given to the organic-inorganic hybrid polymers and functionalized polymers as attractive absorbents, due to their high efficiency for the removal of heavy metals from contaminated water [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27]. In these mixtures, the organic compounds are combined with inorganic substrates, which provide a high interaction with selected metal ions and relatively high adsorption capacities of the metal ions.…”