Volume 2 Number 12 December 2017

Poly (vinylalcohol)-, Polystyrene/Theta Type Zirconium Phosphate Nanocomposite Membranes

Authors: S. K. Shakshooki ; F. Masaudi ; F. El-Akari ; A. Jangher
Pages: 143-154
Novel nanosized theta-type zirconium phosphate, θ-Zr(HPO4)2.1.88H2O (θ-typeZrP), was prepared and characterized. Its average size particles calculated from XRD broadening method using the Scherer’s equation , found to be 60 nm  . Transparent flexible thin films of  poly(vinylalcohol) (PVA)-, polystyrene(PS) / theta-type zirconium phosphate nanocomposite membranes were obtained from mixing PVA-, PS solutions with  different weight percentages of  θ-typeZrP equal to (5,10,15,20% in wt), respectively. The resultant nanocomposite membranes were characterized by XRD and  TGA,. The inorganic filler, θ-typeZrP,   was well dispersed in the organic polymers matrix , show  good thermal and mechanical properties  better than that of the original polymers. These nanocomposites  are promising for utilizations in fuel cells and as sorbents. 

Photocatalysis of Chlorazole Black E Dyes Using Titanium Dioxide Doped With Iron (Fe-TiO2)

Authors: Amana B. S. ; Yilleng M. ; Ayebe B. ; Tanko S. F. ; putshaka J. D. ; Akabuogu E. P.
Pages: 134-142
Fe-TiO2 catalyst was implemented for  photo mineralization of chlorazole black E dye. Percentage conversion.  67.2% ,  74.8% and 62.8%  using 1%, 3% and 5% Fe-TiO2 under Visible light and 73.3%,  67.2% and 62.8%  using 1%, 3% and 5% Fe-TiO2 under UV light after irradiation for 80 Minutes respectively. Fe-TiO2 under UV/Visible light has proven to be effective through the  investigation which was synthesize through wet-impregnation, calcined and characterized to determine the group resulting from bond vibrations using FT-IR and crystalline phase of the catalyst via XRD pattern. It was then subjected to photo-degradation to optimize various experimental parameters such as effects of metal loads, light source and time. The obtained result are shown in decreasing order of activity 3% Fe-TiO2 > 1%Fe-TiO2 >5%Fe-TiO2. Which indicate that   3% Fe-TiO2 shows more photo-degradation at UV/Visible but does more better at visible region with respect to time.