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Cu2S nanopowders were prepared by sol gel combustion method. X-ray diffraction study confirmed tetragonal structure of crystalline (110) plane. Cu2S nanostructure revealed nanorod like morphology. The strong and sharp Raman peaks observed at 474 cm−1 revealed covellite structure. PL emission at 360 nm confirmed material near band edge emission. The IR spectra revealed Cu-S vibration band observed at 607 cm−1. The electrochemical characteristics of synthesized nanomaterial were investigated by cyclic voltammetric analysis. Cu2S exhibits 547 F/g specific capacitance at 0.5 A/g current density obtained by using 1M KOH as electrolytic solution. These results indicated its promising behavior towards electrochemical energy storage applications. [ABSTRACT FROM AUTHOR]

The synthesis of undoped and Ni doped CdO was synthesized by simple hydrothermal technique. The influence of Ni dopant on crystal structure, optical properties and antibacterial studywas observed. The X ray diffraction studies reveal the prepared CdO nanoparticles had good crystallinity and cubic phase with (111), (200), (220), (311) and (222) orientations. The absorption band at different wave numbers assigned to different functional group in FTIR and also confirmed the metal oxygen vibration at 465 cm-1. The SEM image shows that the pure CdO sample showsagglomeration of particles or grains. The Ni doped CdO shows some agglomeration with spheroid like structure by the addition of the dopant. The present work is aimed at investigating antibacterial activity of undoped and Ni doped CdO. The antibacterial activity was carried out at different concentration (50, 100, 150µg/µl) in vitro against two gram positive bacteria Staphylococcus aureus (MTCC 3160), Bacillus subtilis (MTCC 441) and two gram negative bacteria Pseudomonas aeruginos (MTT 741), Escherichia coli (ESBL 3984) and from the zone of inhibition confirmed that the Ni doped CdO can be used as the good antibacterial agent. The present study guides the new route of application of pure and Ni doped CdO nanomaterial in environmental and biomedical areas. [ABSTRACT FROM AUTHOR]