Ultrasound-assisted method to improve the structure of CeO@polyprrole core-shell nanosphere and its photocatalytic reduction of hazardous Cr.

In this work, the CeO@polypyrrole (CeO@PPy) core-shell nanosphere has been synthesized via an ultra-sonication method using bath type (WUC-D22H, Daihan Scientific, Korea) and they are utilized for the photo-reduction of hazardous Cr to benign Cr. The ultrasonic frequency and power were 20 kHz and 100 W, respectively. The PPy shielded CeO in aqueous solution could prevent the dissolution of CeO and to improve the photocatalytic ability of CeO.

Visible Light Photo-Sensitized Metallo-Porphyrin/TiO₂ Photocatalyst and Its Related Self-Cleaning Effects in Poly Ethylene Terephthalate.

Dye degrading property to exhibit self-cleaning effect in Poly Ethylene Terephthalate (PET) through photocatalytic effect by Metallo porphyrin and TiO₂ has been studied in detail. PET has been modified by step wise deposition of anatase TiO₂ and Metallo porphyrin (CuTCNPP, NiTCNPP, ZnTCNPP), self-cleaning property of the modified PET has been studied by photo degradation of rhodamine B (RB) by irradiation under visible light and the degrading ability and the efficiency has been monitored using UV-Vis spectral technique by measuring the change in concentration of RB in the PET at different time intervals. Stability of Metallo porphyrin in PET also measured by UV-Vis spectral method.

Synthesis, Generic Dyeing of Nindigo Derivatives on Unmodified Polypropylene; First Time Application in Dyeing Technology.

Hydrophobic nindigo dyes were designed and successfully synthesized from indigo by reacting with substituted anilines in a simple route. Four nindigo dyes were fruitfully analyzed by H NMR C NMR, electronic and mass spectrometry. Here, we have firstly introduced these nindigo dyes into dyeing area for the dyeing of unmodified polypropylene fiber in aqueous medium.