Sol-Gel Synthesis and Characterization of Nio Nanoparticles (original) (raw)
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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.
APPLICATION OF SOL-GEL METHOD FOR SYNTHESIS OF Ni ( OH ) 2 AND NiO NANOPARTICLES
2018
The sol-gel method was used for obtaining Ni(OH)2 and NiO. For structural characterization of the material we used XRay Diffraction (XRD). Morphological structures and chemical composition were examined by scanning electron microscopy (SEM.). The results obtained, it was found that the average particle size of the Ni(OH)2 is about 15.8 nm and the thermal treatment for calcination at 350° C obtain NiO particle size is 48.5 nm. The result of DSC analysis of the precursor product showed that the proper calcination temperature was 350°C.
Many materials exhibit unique properties when reduced to nano-scale, mainly due to increased surface to volume ratio. These unique properties enable nano-materials to be more beneficial from application view point. Nickel oxide has emerged as a classic example of a class of nano-materials whose structural, electrical and magnetic properties are of great interest. In the present study, we mainly focus on the preparation of nickel oxide nano-crystallites by a novel low cost sol-gel auto-combustion technique. Owing to the importance of fuel reagents in this material's synthesis method, various molar concentrations of citric acid have been employed to achieve the phase pure samples. X-ray diffraction revealed that prepared sample consisted of nickel oxide without any impurity. Sherer's formula confirmed that the nickel oxide samples consisted of crystallites in the nano-meter range. Dielectric and magnetic properties were investigated using LCR meter and vibrating sample magnetometer, respectively.
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.
a novel synthesis process for making nickel oxide nanoparticles
The main aim of this research was to prepare nanoparticles of nickel oxide through a new mixed reverse microemulsion route. Quaternary microemulsion (water/surfactant/cosurfactant/oil-phase) was used to synthesize nickel oxide nanoparticles. The microemulsion was prepared by Tween-80, Aerosol-OT, n-Propanol, Cyclohexane, and Nickel Chloride. Previously nickel oxide nanoparticles were synthesized by reverse microemulsion method but the novelty of the process lies in the fact that conventionally either cationic or anionic or non ionic surfactants are used for the synthesis of nickel oxide nanoparticles.Whereas in the present developed novel process preparation of nickel oxide nanoparticles has been carried out using a unique blend system consisting of Tween-80 and AOT. The average particle size of as synthesized nickel oxide powder, calculated by Scherrer equation, is observed to be 14 nm. The X-ray diffraction pattern confirms the presence of pure bunsenite phase with FCC Scanning Electron Microscopy (SEM) shows that particles have spherical morphology.
A simple route to the synthesis of high-quality NiO nanoparticles
Journal of Nanoparticle Research, 2007
Dispersed nickel oxide nanoparticles were obtained by a simple and low-cost method using a mixture of gelatin as organic precursor and NiCl 2 AE 6H 2 O as Ni source. The average particle size was estimated from X-ray powder diffraction (XRPD) peaks using the Rietveld refinement. The values ranged from 3.2 to 79 nm. We observed that the particle size changes as a function of synthesis time, with a notable decrease after the addition of NaOH to the solution. Field emission scanning electron microscopy (FE-SEM) measurements show that particles have well defined shapes and are dispersed in an organic matrix. X-ray absorption near edge spectroscopy (XANES) shows also the formation of fcc NiO nanoparticles structures.
Synthesis and Characterization of NiO Nanoparticles by Thermal Decomposition Method
Nickel oxide (NiO) nanoparticles were prepared by Thermal Decomposition method. Thermal decomposition or thermolysis is a chemical decomposition caused by heat. Thermal decomposition was thoroughly studied in order to control the particles size of the as-prepared NiO Nano powders. Transition metal oxides and metals have been researched extensively due to their interesting catalytic, electronic and magnetic properties. It has more applications like electro chromic coatings, plastics, textiles, nanowires, Nano fibers and specific alloy and catalyst applications. It is also used in active optical filters, ceramic structure, p-type transparent conductive films and energy efficient smart windows. The synthesized nickel oxide (NiO) nanoparticles were subjects to various studies like X-ray diffraction (XRD) technique and Fourier Transfer Infrared spectroscopy (FTIR).
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.
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.