title: Nanostructure copper oxocobaltate fabricated by co-precipitation route using copper and cobalt nitrate as precursors: characterization by combined diffuse reflectance and FT infrared spectra.
abstract: Nanostructure copper oxocobaltate has been fabricated by a co-precipitation route using copper and cobalt nitrate as precursors. The physicochemical properties of copper cobaltate have been characterized via X-ray powder diffractometry (XRD) and field emission scanning electron microscopy (FESEM). The X-ray diffraction patterns indicates the presence of a spinel crystalline phase, (Cu0.30Co0.70)Co2O4, copper oxocobaltate with face-centered cubic lattice and Fd3m space group. FESEM images also illustrated a typical hexagonal morphology with particle size 25 nm, showing a good nanoscale crystalline morphology, which corresponds well with their XRD results. The FTIR spectra confirmed the presence of hydroxyl groups bonded to the metals, stretching vibration of the cobalt-oxygen bond in an octahedral coordination and the characteristic band assigned to the vibration of Cu-O bond. UV-VIS diffuse reflectance spectrum shows a broad band over the whole visible range and broad band between 200 nm and 390 nm ascribed to the ligand to metal charge transfer.
authors.affiliation: Nanotechnology Laboratory, Department of Chemistry, University of Isfahan, Isfahan 81746-73441, Islamic Republic of Iran. Electronic address: habibi@chem.ui.ac.ir.
authors.forename: Mohammad Hossein
authors.initials: MH
authors.lastname: Habibi
authors.affiliation: Nanotechnology Laboratory, Department of Chemistry, University of Isfahan, Isfahan 81746-73441, Islamic Republic of Iran.
authors.forename: Zoya
authors.initials: Z
authors.lastname: Rezvani
mesh_terms: D002104:Cadmium / Q000737:chemistry; D019187:Cadmium Compounds / Q000737:chemistry*; D003035:Cobalt / Q000737:chemistry*; D056831:Coordination Complexes / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D007477:Ions; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D008968:Molecular Conformation; D053761:Nanocomposites; D053758:Nanoparticles / Q000737:chemistry; D049329:Nanostructures / Q000737:chemistry*; D036103:Nanotechnology; D055095:Optics and Photonics; D010316:Particle Size; D017785:Photons; D011108:Polymers / Q000737:chemistry; D011205:Povidone / Q000737:chemistry; D011789:Quantum Theory; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared; D013440:Sulfides / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D019187:Cadmium Compounds; D056831:Coordination Complexes; D007477:Ions; D011108:Polymers; D013440:Sulfides; D002104:Cadmium; C034939:cadmium sulfide; D003035:Cobalt; C025913:cobaltous nitrate; D003300:Copper; D011205:Povidone
keywords: Co-precipitation; Copper oxocobaltate; DRS spectroscopy; FTIR