Nano-sized Cu6Sn5 alloy prepared by a co-precipitation reductive route

Single crystalline nano-sized multiferroic BiFeO3 (BFO) powders were synthesized through simple chemical co-precipitation method using polyethylene glycol (PEG) as capping agent. We obtained pure phase BiFeO3 powder by controlling pHand calcination temperature. From X-ray diffraction studies the nanoparticles were unambiguously identified to have a rhombohedrally distorted perovskite structure belonging to the space group of R3c. No secondary phases were detected. It indicates single phase structure. EDX spectra indicated the appearance of three elements Bi, Fe, O in 1:1:3. From the UV-Vis diffuse reflectance spectrum, the absorption cut-off wavelength of the BFO sample is around 558nm corresponding to the energy band gap of 2.2 eV. The size (60-70 nm) and morphology of the nanoparticles have been analyzed using transmission electron microscopy (TEM). Â Â Linear Mâˆ’H behaviour and slight hysteresis at lower magnetic field is observed for BiFeO3 nanoparticles from Vibrating sample magnetometer studies. It indicates weak ferromagnetic behaviour at room temperature. From dielectric studies, the conductivity value is calculated from the relation s = L/RbA Sm-1 and it is around 7.2 x 10-9 S/m.

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Exploring the characterization of Ni doped MgO nanoparticles using co-precipitation method

Nanoscale Reports ◽

10.26524/nr.3.6 ◽

2020 ◽

Vol 3 (1) ◽

pp. 30-33

Author(s):

Muthulakshmi M ◽

Madhumitha G

Keyword(s):

Magnesium Oxide ◽

Analytical Techniques ◽

Nickel Chloride ◽

Precipitation Method ◽

Crystalline Powder ◽

High Melting Point ◽

Design Synthesis ◽

Mgo Nanoparticles ◽

Co Precipitation

Nanotechnology is a field of applied science focused on design, synthesis and characterization of nanomaterials. The nickel and magnesium have improved their applications in transparent electrodes and nano electronics. In addition, magnesium oxide has moisture resistance and high melting point properties. In the present work has been carried out in the development of green crystalline powder of nickel doped magnesium oxide nanoparticles by Co-precipitation method, from the mixture of nickel chloride and magnesium chloride with KOH as solvent. From the XRD results, crystalline size of the particle can be observed. Spherical structure of Ni doped MgO nanoparticles were indicated by SEM results and powdered composition of samples were obtained from FTIR. EDAX represents the peak composition of the nanoparticle. The above analytical techniques have confirmed that the Ni doped MgO nanoparticles obtained from the mixture of NiCl2 and MgCl2.

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Coercive force of Co–Ni–Li spinel ferrite particles synthesized through co-precipitation, hydrothermal treatment, and etching in hydrochloric acid

Japanese Journal of Applied Physics ◽

10.35848/1347-4065/aba795 ◽

2020 ◽

Vol 59 (8) ◽

pp. 085002

Author(s):

Mikio Kishimoto ◽

Eiji Kita ◽

Hideto Yanagihara

Keyword(s):

Hydrochloric Acid ◽

Coercive Force ◽

Hydrothermal Treatment ◽

Spinel Ferrite ◽

Co Precipitation

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Diseases Prevention by Water Defluoridation Using Hydrotalcites as Decontaminant Materials

Revista de Chimie ◽

10.37358/rc.17.1.5412 ◽

2017 ◽

Vol 68 (1) ◽

pp. 168-171 ◽

Cited By ~ 2

Author(s):

Letitia Doina Duceac ◽

Cristina Elena Dobre ◽

Ioana Pavaleanu ◽

Gabriela Calin ◽

Simona Nichitus ◽

...

Keyword(s):

Dental Fluorosis ◽

Precipitation Method ◽

Original Structure ◽

Fluoride Removal ◽

Major Goal ◽

Bone Stiffness ◽

Morphological Aspects ◽

Adsorption Capacities ◽

Interlayer Structure ◽

Co Precipitation

Preventing diseases is deemed to be the major goal of our century especially when an excessive fluoride in drinking water can cause dental fluorosis, bone stiffness, rheumatism and skeletal fluorosis. Fluoride uptake from groundwater implies a worldwide multidisciplinary effort in order to develop renewable, cheap, human friendly materials. Among other materials, hydrotalcites could be good candidates for an efficient fluoride removal from water due to their adsorption, anion exchange and reconstruction properties. These nanostructured materials were synthesized using co-precipitation method in controlled conditions. Presence of anions in the interlayer structure and morphological aspects were performed by FTIR and SEM techniques. Thermal treatment of hydrotalcites showed good adsorption capacities for water defluoridation mostly due to their tendency to restore the original structure.

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Multicomponent Equiatomic Lead Strontium Calcium Titanate (Pb Sr Ca)TiO 3 Prepared by Reverse Co-Precipitation

SSRN Electronic Journal ◽

10.2139/ssrn.3458156 ◽

2019 ◽

Author(s):

Annu Sharma ◽

N. Sreenivasulu ◽

Tiju Thomas ◽

S.S. Bhattacharya

Keyword(s):

Calcium Titanate ◽

Co Precipitation

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Investigations on the filtration of natural aquatic suspensions supported by dosing small amounts of Fe(III)-salts (βFe ≤ 0.1 mg.L-1): mode of action and basic design criteria

Water Science & Technology Water Supply ◽

10.2166/ws.2002.0050 ◽

2002 ◽

Vol 2 (2) ◽

pp. 91-98

Author(s):

R. Winzenbacher ◽

R. Schick ◽

H.-H. Stabel ◽

M. Jekel

Keyword(s):

Large Scale ◽

Suspended Solids ◽

Iron Hydroxides ◽

Essential Step ◽

Iron Salts ◽

Alkaline Earths ◽

Co Precipitation ◽

Solid Liquid ◽

Solid Liquid Separation

Improved removal of particles during the treatment of natural aquatic suspensions has been achieved by pre-ozonation and the addition of small quantities of iron salts (βFe ≤ 0.1 mg.L-1; “Fe(III)-assisted filtration”) followed by rapid filtration. As shown by investigations on a large-scale installation at Lake Constance Water Supply, this procedure reliably reduces suspended solids by at least 2-3 powers of ten in long-term use. However, the high efficacy of Fe(III)-assisted filtration cannot be explained on the basis of known coagulation mechanisms (like adsorption-charge neutralization, co-precipitation). Instead, the essential step was found to be the conditioning of the filter medium by coating it with colloids containing Fe(OH)3, and this “Fe coating” process occurs only in the presence of alkaline earths (especially Ca2+). According to further experiments, the enhanced solid-liquid separation was ultimately traced to chemical interactions such as the formation of calcium-organic association structures between the iron hydroxides and other solids. For design of Fe(III)-assisted filtration steps, finally, a βCa/DOC ratio above 40 mg.mg-1 and pre-oxidation with ozone dosages not exceeding 2 mg O3/mg DOC was recommended.

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