Turmeric Extract: Potential Use as a Prebiotic and Anti-Inflammatory Compound?

Plant Foods for Human Nutrition - Prebiotics are regarded as the non-digestible food constituents that are selectively consumed by health-promoting bacteria (probiotics). In fact, a number of...     

Floating Photocatalyst Based on Poly(ε-caprolactone) Foam and TiO<Subscript>2</Subscript> Nanoparticles for Removal of Textile Dyes

This study discusses a novel approach for fabrication of floating photocatalyst which can be efficiently exploited for photodegradation of dyes in aqueous solutions. A fabrication of the floating photocatalyst consisted of two steps: transformation of the poly(ε-caprolactone) beads (PCL_b) into poly(ε-caprolactone) foam (PCL_f) with porous structure in supercritical carbon-dioxide and subsequent loading of PCL_f with TiO₂ nanoparticles (NPs). Morphological characterization of the PCL_f before and after TiO₂ NPs loading was carried out by FESEM. The presence of titanium on the surface and inside the PCL_f was detected by EDX. Photocatalytical activity of the floating photocatalyst was investigated in aqueous solution of textile dyes C.I. Acid Orange 7 (AO7) and C.I. Basic Yellow 28 (BY28) which were exposed to lamp that simulates the sun light. In addition to sustainable floatability for a long period of time, developed floating photocatalyst exhibited high rate of photodegradation since the complete discoloration of AO7 and BY28 solutions and photocatalysts alone occurred after 300 and 180 min of illumination, respectively. Its photocatalytic activity was preserved after three repeated photodegradation cycles with unchanged chemical structure that was confirmed by FTIR analysis.