Hamid Emadi

Sonochemical synthesis and characterization of NiMoO4 nanorods

NiMoO(4) nanorods have been successfully synthesized by sonochemical method process by using Ni(CH(3)COO)(2) · 4H(2)O and (NH(4))(6)Mo(7)O(24) · 4H(2)O as starting materials. Some parameters including ultrasonic power, ultrasonic irradiation time, stirring effect, solvent effect, and surfactant effect were investigated to reach optimum condition. The as synthesized nanostructures were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmittance electron microscopy (TEM), photoluminescence (PL) spectroscopy, Fourier transform infrared (FT-IR) spectra and energy dispersive X-ray microanalysis (EDX). Facile preparation and separation are important features of this route. This work has provided a general, simple, and effective method to control the composition and morphology of NiMoO(4) in aqueous solution, which will be important for inorganic synthesis methodology.

Simple and surfactant free synthesis and characterization of CdS/ZnS core–shell nanoparticles and their application in the removal of heavy metals from aqueous solution

In the current study, CdS/ZnS core–shell nanoparticles were successfully synthesized from CdSO4·8H2O and Zn(NO3)2·6H2O starting reagents in the presence of ultrasonic irradiation. The effects of preparation parameters such as ultrasonic power, irradiation time, and precursor concentration on the morphology of the CdS/ZnS core–shell nanoparticles and the removal of heavy metals (Hg+2, Pb+2) were studied by SEM and batch adsorption studies. The as-synthesized products were characterized by powder X-ray diffraction (XRD), transmission electron microscopy (TEM), high-resolution field-emission transmission electron microscopy (HRTEM), photoluminescence spectroscopy (PL), scanning electronic microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), and ultraviolet-visible (UV-Vis) spectroscopy.

Synthesis and Characterization PbS and Bi2S3 Nanostructures via Microwave Approach and Investigation of Their Behaviors in Solar Cell

PbS and Bi2S3 nanostructures were synthesized successfully via a microwave approach. For synthesis of PbS nanoparticles, a new precursor, [bis(salisylate) lead (ΙΙ)]; [Pb(Hsal)2] was used. The products were characterized by X-ray diffraction, scanning electron microscopy, and photoluminescence spectroscopy. Thin film of Bi2S3 was prepared by doctor’s blade technique and solar cell made from ITO/Bi2S3/PbS/Pt layers. I–V characterization was investigated for this cell and fill factor, open circuit voltage and short circuit current values were obtained.

Synthesis of some transition metal (M: 25Mn, 27Co, 28Ni, 29Cu, 30Zn, 47Ag, 48Cd) sulfide nanostructures by hydrothermal method

The design of nanostructures with favored shape, particle size and structure is one of the most important fields of nanoscience. To reach this target hydrothermal method is one of the most applicable methods which allow us to obtain favored structures by changing some parameters. This review focuses on synthesis of some transition metal sulfides by hydrothermal method because of technological importance of this group of material. The common sulfides of Mn, Co, Ni, Cu, Zn, Ag and Cd are introduced and a mechanism proposed for their synthesis. The effects of temperature and time reaction, surfactant, reactants concentration, metal and sulfur sources and etc. on the morphology, particle size and some properties of the products are investigated. SEM and TEM images show the morphology and size of the as-synthesized samples. Chemical composition of the samples is characterized by XRD, EDS and etc. The magnetic, optical and thermoelectric properties of the metal sulfides are investigated.

Synthesis, characterization and crystal structure of new nickel molybdenum complex with the pyridine dicarboxylic acid ligand: Novel precursors for nickel molybdate nanoparticles

AbstractA novel nickel molybdenum complex with the 2,6-pyridine dicarboxylic acid ligand was successfully synthesized and characterized by thermogravimetric analysis and single crystal X-ray crystallography. The single-crystal X-ray data revealed that the structure is a hydrated 1-D polymer with two different Ni sites. The synthesized complex was then used as a new precursor for the preparation of the related nickel molybdate nanoparticles. The crystallinity and morphology of the nickel molybdate nanoparticles were characterized by powder X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDS), scanning electron microscopy (SEM), transmittance electron microscopy (TEM), and Photoluminescence (PL) spectroscopy. Graphical AbstractA novel nickel molybdenum complex with the 2,6-pyridine dicarboxylic acid ligand was synthesized. The results confirmed that monodispersed nanoparticles of NiMoO4 were obtained by thermal decomposition of the complex at 450°C for 8 h.