Effect of doping ion concentration on the photoluminescence behavior of CdWO4:Tb3+ phosphor synthesized via co-precipitation method

2018 ◽  
Vol 92 (11) ◽  
pp. 1461-1466 ◽  
Author(s):  
N. Premjit Singh ◽  
N. Ramananda Singh ◽  
N. Rajmuhon Singh ◽  
N. Mohondas Singh
Keyword(s):  
Ion Concentration ◽  
Precipitation Method ◽  
Co Precipitation ◽  
Photoluminescence Behavior ◽  
Effect Of Doping

scholarly journals Post annealing induced manipulation of phase and upconversion luminescence of Cr3+ doped NaYF4:Yb,Er crystals

RSC Advances ◽  
2019 ◽  
Vol 9 (17) ◽  
pp. 9364-9372 ◽  
Author(s):  
Shivanand H. Nannuri ◽  
Suresh D. Kulkarni ◽  
Subash C. K. ◽  
Santhosh Chidangil ◽  
Sajan D. George
Keyword(s):  
Upconversion Luminescence ◽  
Ion Concentration ◽  
Luminescence Properties ◽  
Precipitation Method ◽  
Post Annealing ◽  
Co Precipitation

Co-dopant (Cr3+ ion) concentration as well as post annealing found to change the structural as well as luminescence properties of Cr3+ ion doped NaY80%F4:Yb17%,Er3% prepared via a co-precipitation method.

The effect of doping Mg2+ on structure and properties of Sr(1.992-x)MgxSiO4: 0.008Eu2+ blue phosphor synthesized by co-precipitation method

2018 ◽  
Vol 75 ◽  
pp. 887-892 ◽  
Author(s):  
Lingxiang Yang ◽  
Jin-shan Wang ◽  
Da-chuan Zhu ◽  
Yong Pu ◽  
Cong Zhao ◽  
...  
Keyword(s):  
Precipitation Method ◽  
Structure And Properties ◽  
Blue Phosphor ◽  
Co Precipitation ◽  
Effect Of Doping

scholarly journals Mn substituted MnxZn1−xCo2O4 oxides synthesized by co-precipitation; effect of doping on the structural, electronic and magnetic properties

RSC Advances ◽  
2018 ◽  
Vol 8 (70) ◽  
pp. 39837-39848 ◽  
Author(s):  
Tarekegn Heliso Dolla ◽  
David G. Billing ◽  
Charles Sheppard ◽  
Aletta Prinsloo ◽  
Emanuela Carleschi ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Precipitation Method ◽  
Electronic And Magnetic Properties ◽  
Precipitation Effect ◽  
Co Precipitation ◽  
Effect Of Doping

Mn substituted MnxZn1−xCo2O4 (x = 0, 0.3, 0.5, 0.7, 1) oxides were synthesized by a facile co-precipitation method followed by calcination at 600 °C.

PHYSICO-CHEMICAL, STRUCTURAL AND ELECTRICAL STUDIES OF Cu–Zn FERRITES SYNTHESIZED BY NOVEL CHEMICAL ROUTE

2011 ◽  
Vol 25 (16) ◽  
pp. 2157-2166
Author(s):  
K. S. LOHAR ◽  
S. M. PATANGE ◽  
D. R. MANE ◽  
SAGAR E. SHIRSATH ◽  
N. D. SHINDE ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Loss Tangent ◽  
Zinc Ion ◽  
Ion Concentration ◽  
Precipitation Method ◽  
Chemical Route ◽  
Constant Frequency ◽  
Physico Chemical ◽  
Co Precipitation ◽  
Average Lattice

The physico-chemical, structural and electrical properties of zinc substituted copper ferrites having the general formula Cu 1-x Zn x Fe 2 O 4(x=0.0 to x=0.8) have been studied as a function of zinc ion concentration. The sample was prepared by co-precipitation method from corresponding metal sulphates. X-ray diffraction patterns were used to confirm the structure of synthesized samples. The calculated and theoretical values of average lattice constant, tetrahedral bond, tetrahedral edge and unshared octahedral edge were found to increase, while the shared octahedral edge and octahedral bond decrease as the Zn ion concentration increases. The dielectric constant (ε′) and dielectric loss tangent ( tan δ) were measured at a constant frequency 1 kHz as a function of temperature. The dielectric constant and loss tangent were found to increase with rise in temperature. The conduction mechanism in these ferrites is discussed on the basis of electron exchange between Fe 2+ and Fe 3+ ions. The temperature dependent dc resistivity was carried out in the temperature range 300 to 800 K. The plots of log ρ versus 103/ T are linear showing two regions, corresponding to ferrimagnetic and paramagnetic regions.

scholarly journals Magnetically synthesized MnFe2O4 nanoparticles as an effective adsorbent for lead ion removal from an aqueous solution

2021 ◽  
Author(s):  
Mohamed R. Hassan ◽  
Mohamed I. Aly
Keyword(s):  
Contact Time ◽  
Metal Ion ◽  
Adsorption Process ◽  
Ion Concentration ◽  
Precipitation Method ◽  
Lead Ion ◽  
Order Kinetic ◽  
Adsorption Parameters ◽  
Isotherm Study ◽  
Co Precipitation

Abstract The adsorption behavior of lead(II) using a new magnetic adsorbent is investigated. The facile synthesis of MnFe2O4 was carried out using the co-precipitation method. The different parameters that affected the adsorption process were investigated such as contact time, metal ion concentration, pH, temperature, and the adsorbent dosage. The maximum lead(II) sorption capacity was found to be 75.75 (mg/g) and obtained using 1 g/L MnFe2O4 when pH equals 5.3, a temperature of 25 °C, and contact time as 60 min. The adsorption isotherm study indicated that the Langmuir model was the best model that described the adsorption process using 1 g/L MnFe2O4. Based on the values of correlation coefficient data (R2), the kinetic adsorption parameters were well defined by the second-order kinetic model. Furthermore, the temperature effect findings have been confirmed that the removal of lead ions was endothermic. The desorption efficiency reached more than 88% when used 0.01 M NaOH as an eluent.

Effect of Doping of Zn and Ca into ErBa2Cu3O7−δ Superconductor Prepared via Co-precipitation Method

2011 ◽  
Vol 25 (2) ◽  
pp. 255-260 ◽  
Author(s):  
Elyas Sadeq Alaghbari ◽  
Zulkarnain Zainal ◽  
Imad Hamadneh ◽  
Mohd Zobir Bin Hussein ◽  
Mohd Haniff Bin Wahid
Keyword(s):  
Precipitation Method ◽  
Co Precipitation ◽  
Effect Of Doping

Magnetic and dielectric properties of BiFeO3 nanoparticles

2015 ◽  
Vol 7 (2) ◽  
pp. 1393-1403
Author(s):  
Dr R.P VIJAYALAKSHMI ◽  
N. Manjula ◽  
S. Ramu ◽  
Amaranatha Reddy
Keyword(s):  
Diffuse Reflectance Spectrum ◽  
Precipitation Method ◽  
Secondary Phases ◽  
X Ray Diffraction ◽  
Bifeo3 Nanoparticles ◽  
Transmission Electron ◽  
Multiferroic Bifeo3 ◽  
Pure Phase ◽  
Simple Chemical ◽  
Co Precipitation

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).   Linear M−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.

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

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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