Structural Studies of Bio-Mediated NiO Nanoparticles for Photocatalytic and Antibacterial Activities

Publication date: Available online 18 January 2020Source: Inorganic Chemistry CommunicationsAuthor(s): Karthik Kannan, D Radhika, Maria P. Nikolova, Kishor Kumar Sadasivuni, Hakimeh Mahdizadeh, Urvashi VermaAbstractNickel Oxide (NiO) nano-sized sample was bio-synthesized by a microwave-assisted route consuming citrus variety fruit juice. The prepared NiO sample was investigated by various spectroscopy techniques. The X-ray diffractogram revealed the formation of a cubic spinel with a well crystalline nature of NiO nanoparticles with a very fine crystallite size of 20 nm. FTIR revealed Ni-O and smaller C-H and H-O-H characteristic functional groups, whereas the morphological characteristics determined by SEM and TEM disclosed a spherical shape of prepared nanoparticles. Elemental compositions present in NiO nanoparticles were found by EDAX as per the requirement. Emission peaks of luminescence were noticed at 350, 441, 485, and 531 nm. The spherical NiO nanoparticles showed 91% photodegradation efficiency for Evans blue under sunlight. Furthermore, the antibacterial performance of NiO sample was determined by agar well diffusion technique, which demonstrated significant cell inhibition in contradiction of both bacterial strains of gram-positive and gram-negative.Graphical abstractA plot of ln(C0/C) as a function of irradiation time for EB dye

Source: Inorganic Chemistry Communications - January 20, 2020 Category: Chemistry Source Type: research