March 2012

Enhanced photoluminescence from ZnO/ZnS core-shell structure

  The effect of ZnS coating over ZnO core is discussed in this present report. Very simple two step wet chemical method was used for the fabrication of this core-shell structure. XRD and HRTEM data reveal the formation of good shell coating over the ZnO core. Photoluminescence spectra shows that emission intensity is at least four times higher when coated with ZnS compare to bare ZnO. Band gap is also...

Author(s):   Sarmila Dutta, Shibabrata Basak and Pijus Kanti Samanta        

March 2012

Chlorine adsorption kinetics of activated carbon from selected local raw materials

  Chlorine adsorption kinetics of activated carbons from Cattle bone, coconut-shell and wood as influenced by mode of activation (heat and acid) were studied using a commercial activated carbon (CAC) as control. Batch chlorine adsorption by each activated carbon was investigated by contacting with fixed amount of chlorine solution at 10, 15, 20, 25, and 30°C respectively at 10 min intervals. The residual...

Author(s):   Yusufu, Mohammed I., Ariahu, C. C., Nkpa, N. N. and Igbabul, B. D.