Synthesis and Characterization of NiO Nanoparticles by Thermal Decomposition Method (original) (raw)
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SYNTHESIS & CHARACTERIZATION OF NICKEL OXIDE NANOPARTICLES BY USING CO- PRECIPITATION METHOD
In the present work Nickel oxide nanoparticles were Synthesized using Co-Precipitation method .It is simple and cost effective method .Nickel chloride hexahydrated was used (as a starting material)& ammonia solution was used for this synthesis. The prepared nanoparticles of metal oxide (Nio) were characterized by using XRD,SEM,TEM,FTIR&EDAX. The average particle size ,crystalline structure were estimated using XRD Analysis. The structural functional groups &optical characters were analyzed by using SEM, FTIR & UV-Visible Techniques. EDAX spectrum that showed the elemental composition of Nickel oxide, FTIR Showed the functional groups present in the synthesized Nickel oxide Nanoparticles.TEM Results confirmed the synthesis of nickel oxide nanoparticles. This simple & cost effective synthesis method will be useful for different industries for the preparation of Nickel oxide nanoparticles. In future this synthesized nanoparticle will be useful for photocatalytic Degradation of toxic dyes.
Synthesis of nickel and nickel oxide nanoparticles via heat-treatment of simple octanoate precursor
Journal of Alloys and Compounds, 2010
Nickel oxide nanoparticles have been synthesized via heat-treatment of a new precursor nickel octanoate Ni(octa) 2 ; (octa = octanoate); in the range of 400-900 • C. The effect of calcination temperature on particle size has been investigated. When the calcinations were conducted in air from 400 to 900 • C, the precursor Ni(octa) 2 was first changed to Ni, then to NiO. When calcined in argon atmosphere, Ni(octa) 2 was directly converted into pure Ni at as low as 500 • C. The products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and Fourier transform infrared (FT-IR) spectroscopy. The synthesized NiO nanoparticles have quasi-spherical particles with size of about 24 nm. The optical absorption band gap of NiO nanoparticles is 3.41 eV.
2014
Herein, we report the effect of calcination on the structural and optical properties of nanocrystalline NiO. NiO nanoparticles were synthesized by chemical precipitation method using nickel nitrate hexahydrate and ammonium carbonate. Thermogravimetric analysis was done to determine the thermal behavior of the precursor. The samples were characterized by X-ray diffraction (XRD), energy dispersive X-ray analysis (EDAX), high resolution transmission electron microscopy (HRTEM), Fourier transform infrared spectroscopy (FTIR), UV-visible and photoluminescence (PL) spectroscopy. Crystallite size and lattice strain on peak broadening of NiO nanoparticles have been studied using Williamson–Hall (WH) analysis. Significant modifications were observed in the crystallite size, absorption spectra and photoluminescence intensity due to calcination. The desired structural and optical properties of NiO nanoparticle make it as a promising material for optoelectronic applications.
Facile synthesis of Ni/NiO nanocomposites via thermal decomposition
2018
In this study, Ni/NiO nanocomposites were prepared using simple, environment-friendly and low-cost solid-state thermal decomposition method from nickel (II) Schiff base complex at 400 and 500°C for 3 hours. The Ni/NiO nanocomposites were characterized with Fourier transformed infra-red spectroscopy (FT-IR), X-ray powder diffraction (XRD), transmission electron microscopy (TEM) and X-Ray fluorescence (XRF). Results of XRD and XRF confirmed that the nanocomposite products contain a mixture of nickel and nickel oxide. The Ni or NiO content varied with the temperature used for the synthesis. Upon increasing the temperature from 400 to 500°C, the amount of NiO was found to be increased due to a complete oxidation of Ni to NiO. The TEM images demonstrated that the composites were spherical with a distribution size of about 10-30 nm. In addition, the products displayed reasonable electrochemical performance.
Facile synthesis of nickel oxide nanoparticles and their structural, optical and magnetic properties
This work sought to draw a comparison between the photocatalytic proficiency of NiO nanoparticles (NPs) for the degradation of Methylene blue (MB) and Rhodamine B (Rh B) dye. The NiO NPS were synthesized by a facile straightforward chemical route by utilizing NiCl 2 and NaHCO 3 as a precursor. The morphological characteristics of the synthesized NiO NPs have been characterized by using SEM. In addition XRD, FTIR and EDX analysis were also carried out to investigate the crystalline size, functional group and elemental composition of the NPs. The NiO NPs were subsequently used for the photocatalytic degradation of the MB and Rh B in the presence of the visible light irradiation. For evaluation of photocatalytic proficiency, the influence of various key parameters viz. pH of the dye solution, initial dye concentration, Irradiation time and amount of the catalyst were investigated. The extent of photocatalytic degradation of MB and Rh B was found to be 98.7 and 80.33% at pH 2 and 10 respectively. The kinetic investigation of photocatalytic degradation followed a pseudo-first-order rate kinetics for MB and Rh B dye with rate constant 4.6 × 10 −1 and 3.6 × 10 −2. Additionally, the synthesized NiO NPs was used for the antimicrobial activity against the few gram-positive and gram-negative microorganisms. Highlights • The NiO nanocrystalline semiconducting photocatalyst was successfully synthesized by a facile straightforward chemical route by utilizing NiCl 2 and NaHCO 3 as a precursor. • Novel simple chemical route synthesis at room temperature. • First time report a combine study of photocatalytic degradation of Methylene blue and Rhodamine B dye by using NiO as a photocatalyst. • Also, Antimicrobial study was examined which clearly indicate the biocompatibility of synthesized NiO nanoparticles.
Synthesis and Characterization of Ni2O3 as a Phase of Nickel Oxide Nanomaterial
Iraqi Journal of Science
Ni2O3 nanomaterial, a phase of nickel oxide, is synthesized by a simple chemical process. The pure raw materials used in the present process were nickel chloride hexahydrate NiCl2.6H2O and potassium hydroxide KOH by utilizing temperature at 250 oC for 2 hour. The structural, morphological and optical properties of the synthesized specimens of Ni2O3 were investigated employing diverse techniques such as XRD, AFM, SEM and UV-Vis, respectively. The XRD technique confirms the presence of Ni2O3 nanomaterial with crystal size of 57.083 nm which indexing to the (2θ) of 31.82; this results revealed the Ni2O3 was a phase of nickel oxide with Nano structure. The synthesized Ni2O3 will be useful in manufacturng electrodes materials for fuel cell and production catalytic materials for electrolysis cell.
In this paper, plate-like NiO nanoparticles were prepared by one-pot solid-state thermal decomposition of nickel (II) Schiff base complex as new precursor. First, the nickel (II) Schiff base precursor was prepared by solid-state grinding using nickel (II) nitrate hexahydrate, Ni(NO3)2∙6H2O, and the Schiff base ligand N,N′-bis-(salicylidene) benzene-1,4-diamine) for 30 min without using any solvent, catalyst, template or surfactant. It was characterized by Fourier Transform Infrared spectroscopy (FT-IR) and elemental analysis (CHN). The resultant solid was subsequently annealed in the electrical furnace at 450 °C for 3 h in air atmosphere. Nanoparticles of NiO were produced and characterized by X-ray powder diffraction (XRD) at 2θ degree 0-140°, FT-IR spectroscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The XRD and FT-IR results showed that the product is pure and has good crystallinity with cubic structure because no characteristic peaks of im...
2014
Ni/NiO nanopowders with different metal and oxide phase ratio have been prepared by using thermal decomposition of nickel acetate ammine complexes which contain various ammonia concentrations at the temperature range 300 – 500 oC in air. Obtained powders have been characterized by IR-spectroscopy, XRD and TG, DTA, DTG, TEM, laser granulometry, adsorption-structural method and layer-by-layer Auger analysis. Thermal decomposition of nickel ammine complexes occurred with formation of crystalline hydroxide containing and amorphous carbonate containing precursors. Changing of precursors composition with different NH 3 content and annealing duration and temperature leads to different pore structure, agglomerate size of powders and determinates free and fixed carbon concentrations. Mean crystallite size of nickel depended on temperature only. In the temperature range from 350 to 500 °С the crystallite size of nickel has grown from 50 to 55 nm. Mean crystallite size of nickel oxide depended...
The Nickel oxide Nanoparticles were synthesized from Nickel Nitrate Hexahydrate aqueous solution under the chemical method at 90°C. The average crystallite size was calculated from De-Bye Scherrer's equation. FESEM, EDX, XRD were used to characterize the structural features of the product. FTIR spectra confirmed the adsorption of the Nickel oxide nanoparticles. In addition, UV-visible absorption spectra were employed to estimate the band gap energy of the Nickel oxide nanoparticles. This method may be suitable for large scale production of Nickel oxide nanoparticles for practical applications. The effect of Nickel oxide nanoparticles is screened in vitro for antimicrobial activity by Disc diffusion method. The bacterial organisms used in this study are E.coli, Bascillus Subtilis and also fungi Aspergillus Niger. The observed inhibition zones for these nanoparticles are in the range of 8mm for E.coli and 7mm for Bascillus Subtilis and 7mm for fungi Aspergillus Niger. The cytotoxicity activities of Nickel oxide nanoparticles screened by MTT assay. We have screened for one type of cancer cell-line i.e MCF-7(Breast Cancer), Nickel oxide nanoparticles obtained IC 50 values in the range of 32.59ug/ml for MCF-7 cell line.
Synthesis and characterization of NiO nanoparticles for electrochemical applications
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2012
Due to the outstanding electrical, magnetic and catalytic properties, nickel oxide (NiO) has been received considerable attention during the past decades. In this study, NiO nanoparticles were prepared by solgel method, which is one of the simplest and lowest-cost techniques. The synthesis was accomplished by using Poly(alkylene oxide) block copolymer as the surfactant, and Ni(NO 3) 2 •6H 2 O as the inorganic precursor. The effect of experimental parameters, such as calcination temperatures and H 2 O concentration on the NiO nanoparticles formation were investigated. TGA, XRD, SEM, TEM and N 2 adsorptiondesorption isotherms were used to characterize the microstructure and specific surface area of the samples. TGA and FTIR analyses demonstrated that copolymers were expelled at 573 K. The formation of NiO nanoparticles and their structural features were greatly dependent on the calcination temperature. The sample calcined at 923 K was composed of pure NiO nanoparticles as shown by XRD. As H 2 O concentration was increased, the reoxidation process of metallic Ni to form NiO would reduce, but it would not affect the structural type of NiO nanoparticles. In general, the addition of water would weaken and inhibit oxidation effects. The temperature of stable metallic Ni was increased up to 823 K. The specific surface area evaluated from the N 2 adsorptiondesorption indicated that the samples consisting of non-porous NiO nanoparticles. Increasing H 2 O addition resulted in an increase of specific surface area of nanocrystalline NiO powder.