Physico-mechanical properties, potent adsorptive and photocatalytic efficacies of sulfate resisting cement blends containing micro silica and nano-TiO2

Blends contain sulfate resisting cement (SRC), micro silica (MS) and nano-sized TiO2 (nT) were prepared. The phase of nT is a pure anatase. Incorporating 5 wt.% of nT into cement blends gave more desirable physico-mechanical properties than others. The prepared mixes exhibited adsorptive action towards the hazard water-soluble xanthenes dye (pyronin Y, PY). The Delta G degrees of the PY contact with the nT-SRC/MS blend giving an estimate of -27.3 kJ. Adsorption capacity was calculated using UV-Vis spectroscopy. Contact time, pH and blend composition had an effect on the adsorption process. Blend surface is photoactive in the photomineralization of the adsorbed PY. Crown Copyright (C) 2013 Published by Elsevier Ltd. All rights reserved.