title: Synthesis, structural and optical properties of ZnO and Ni-doped ZnO hexagonal nanorods by Co-precipitation method.
abstract: Ni doped ZnO (Zn1-xNixO, x=0.0, 0.03, 0.06 and 0.09) nanorods have been synthesized by Co-precipitation method. Zinc acetate dehydrate [Zn(CH3COO)2⋅2H2O], nickel nitrate [Ni(NO3)3⋅6H2O], sodium hydroxide and poly (vinyl pyrrolidone) (PVP) were mixed together. The morphology, optical and microstructure were determined by X-ray diffraction (XRD), scanning electron microscopy (SEM), Energy dispersive spectrum (EDS), atomic force microscopy (AFM), UV-DRS spectrum, photoluminescence spectra (PL) and Fourier transformer infrared spectroscopy (FT-IR). The presence of functional groups and chemical bonding is confirmed by FTIR. PL spectra of the Zn1-xNixO systems shows that the shift in near band edge (NBE) UV emission from 321 to 322 nm and a shift in red band (RB) emission from 620 to 631 nm which conforms the substitution of Ni into the ZnO lattice. The investigation conformed that the products were of the wurtzite structure of ZnO. The hexagonal nanorods have edge length 31 nm and thickness of 39 nm. EDS result showed that the amount of Ni in the product is about 9%, these Ni doped hexagonal nanorods exhibits a blue shifts and weak (UV) emission peak, compared with pure ZnO, which may be induced by the Ni-doping different concentrations 0.0, 0.3, 0.6 and 0.9 M. The growth mechanism of the doped hexagonal nanorods was also discussed.
authors.affiliation: Department of Physics, Annamalai University, Annamalai Nagar 608002, Tamilnadu, India.
authors.forename: K
authors.initials: K
authors.lastname: Raja
authors.affiliation: Department of Physics (DDE Wings), Annamalai University, Annamalai Nagar 608002, Tamilnadu, India. Electronic address: psrddephyau@gmail.com.
authors.forename: P S
authors.initials: PS
authors.lastname: Ramesh
authors.affiliation: Department of Physics, Annamalai University, Annamalai Nagar 608002, Tamilnadu, India.
authors.forename: D
authors.initials: D
authors.lastname: Geetha
mesh_terms: D011232:Chemical Precipitation; D043942:Nanotubes / Q000737:chemistry* / Q000648:ultrastructure; D009532:Nickel / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D015034:Zinc Oxide / Q000737:chemistry*
chemical_list: D009532:Nickel; D015034:Zinc Oxide
keywords: Co-precipitation; FTIR; Ni-doped ZnO rods; Optical absorption