scholarly journals Crystal Chemistry and Luminescence Properties of Eu-Doped Polycrystalline Hydroxyapatite Synthesized by Chemical Precipitation at Room Temperature

Crystals ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 250 ◽  
Author(s):  
Francesco Baldassarre ◽  
Angela Altomare ◽  
Nicola Corriero ◽  
Ernesto Mesto ◽  
Maria Lacalamita ◽  
...  
Keyword(s):  
Fourier Transform ◽  
High Temperature ◽  
Inductively Coupled Plasma ◽  
Room Temperature ◽  
Annealing Temperature ◽  
Chemical Precipitation ◽  
Precipitation Method ◽  
X Ray Diffraction ◽  
X Ray ◽  
Inductively Coupled

Europium-doped hydroxyapatite Ca10(PO4)6(OH)2 (3% mol) powders were synthesized by an optimized chemical precipitation method at 25 °C, followed by drying at 120 °C and calcination at 450 °C and 900 °C. The obtained nanosized crystallite samples were investigated by means of a combination of inductively coupled plasma (ICP) spectroscopy, powder X-ray diffraction (PXRD), Fourier Transform Infrared (FTIR), Raman and photoluminescence (PL) spectroscopies. The Rietveld refinement in the hexagonal P63/m space group showed europium ordered at the Ca2 site at high temperature (900 °C), and at the Ca1 site for lower temperatures (120 °C and 450 °C). FTIR and Raman spectra showed slight band shifts and minor modifications of the (PO4) bands with increasing annealing temperature. PL spectra and decay curves revealed significant luminescence emission for the phase obtained at 900 °C and highlighted the migration of Eu from the Ca1 to Ca2 site as a result of increasing calcinating temperature.

Synthesis, characterization and antibacterial studies of copper sulphide nanoparticles by chemical precipation method

2020 ◽  
Vol 3 (2) ◽  
Author(s):  
Gowthami R ◽  
Nivetha K P
Keyword(s):  
Room Temperature ◽  
Functional Group ◽  
Copper Acetate ◽  
Chemical Precipitation ◽  
Precipitation Method ◽  
Copper Sulphide ◽  
X Ray Diffraction ◽  
Visible Spectroscopy ◽  
X Ray ◽  
Antibacterial Studies

In this present study the non toxic CuS nanoparticles was synthesized by the reaction of copper acetate, thiourea along with the precipitating agent NaoH under chemical precipitation method. The final product CuS nanomaterial was dried at room temperature for better growth of nanoparticles. The size and growth of the crystal depends on the temperature also on the addition of reagent. The resultant nanocrystal were characterized using various techniques like X ray diffraction reveals the particle size, Scanning electron microscope determines the morphology of crystal, Energy dispersive X ray spectroscopy investigate the elemental composition of nanoparticles, U-Visible spectroscopy examine the presence of metallic ion, Fourier transform infrared spectroscopy inspect the existence of functional group. The antibacterial activity of hexagonal structured copper sulphide nanomaterials against gram positive and gramnegative bacteria were also analyzed for their wide applications.

scholarly journals Synthesis and Electrochemical Examination of Fe2O3/CeO2 Nanocomposite for Supercapacitor Application

2019 ◽  
Vol 9 (1S3) ◽  
pp. 379-382
Keyword(s):  
Room Temperature ◽  
Functional Group ◽  
Chemical Precipitation ◽  
Sem Analysis ◽  
Precipitation Method ◽  
X Ray Diffraction ◽  
X Ray ◽  
Supercapacitor Application ◽  
Ftir Technique ◽  
Maximum Specific Capacitance

Fe2O3 /CeO2 nanocomposite was synthesized by a chemical precipitation method in room temperature. The prepared nanocomposite has been subjected to some characterization techniques such as XRD, SEM, FTIR, CV, etc., The presence of crystalline phases of CeO2 and Fe2O3 were confirmed by the powder X–Ray diffraction analysis. Surface morphology of the prepared nanocomposite has been analyzed using SEM analysis. The functional group vibrations were analyzed by FTIR technique. The maximum specific capacitance achieved by using 1M KOH electrolyte solution is about 242 Fg-1 at 5 Ag-1 current density.

Electroless Ni-B Alloy Plating from DMF at Room Temperature

2012 ◽  
Vol 557-559 ◽  
pp. 1772-1776
Author(s):  
Jian Chao Wang ◽  
Shu Hai Wang ◽  
Guang Ye ◽  
Bo Zhai
Keyword(s):  
Inductively Coupled Plasma ◽  
Room Temperature ◽  
Alloy Coating ◽  
Operating Conditions ◽  
Basic Solution ◽  
X Ray Diffraction ◽  
X Ray ◽  
Inductively Coupled ◽  
Alloy Plating ◽  
Electroless Ni

A new basic solution for eletroless Ni-B alloy plating from DMF was studied. The effects of composition and operating conditions on the rate of deposition of Ni-B alloy have also been discussed. The alloy component was analyzed by EDS and Inductively Coupled Plasma (ICP). The plating rate is determined by electronic balance. And structures of the plating coatings were investigated by means of scanning electron microscopy (SEM) and X-ray diffraction (XRD).The optimum composition and operating conditions for abstaining satisfied Ni-B alloy coating are provided.

CdS NANORODS FABRICATED BY ICP-ASSISTED MAGNETRON SPUTTERING AT ROOM TEMPERATURE

2008 ◽  
Vol 15 (04) ◽  
pp. 515-518
Author(s):  
S. Y. HUANG ◽  
S. XU ◽  
J. D. LONG ◽  
J. W. CHAI ◽  
Q. J. CHENG
Keyword(s):  
Magnetron Sputtering ◽  
Inductively Coupled Plasma ◽  
Room Temperature ◽  
Low Frequency ◽  
Silicon Substrates ◽  
X Ray Diffraction ◽  
X Ray ◽  
Inductively Coupled ◽  
Cds Nanorods ◽  
Deposition Parameters

Cadmium sulfide ( CdS ) nanocrystals are successfully fabricated on glass and silicon substrates at room temperature with low-frequency (460 kHz) inductively coupled plasma assisted magnetron sputtering technique. Both size and shape can be controlled by changing deposition parameters and substrates. Field-emission scanning electron microscope, energy dispersive X-ray spectroscopy, and X-ray diffraction are adopted to measure the properties of CdS nanorods.

scholarly journals XRD and FTIR Analysis of Magnesium Substituted Tricalcium Calcium Phosphate Using a Wet Precipitation Method

2020 ◽  
Vol 11 (1) ◽  
pp. 8034-8042
Keyword(s):  
Inductively Coupled Plasma ◽  
Optical Emission ◽  
Lattice Parameter ◽  
Precipitation Method ◽  
Molar Ratio ◽  
X Ray Diffraction ◽  
X Ray ◽  
Inductively Coupled ◽  
Tcp Phase ◽  
Mg Doped

The incorporation of magnesium (Mg) in tricalcium phosphate (TCP) was prepared through a precipitation method followed by calcination at 850 °C in air. Calcium hydroxide, (Ca(OH)2), phosphoric acid, (H3PO4), and magnesium chloride (MgCl2.6H2O) with a Ca/P ratio of 1.5, were mixed as the precursor materials. The concentration of added Mg was varied with respect to calcium (Ca) precursor molarity as such Mg/(Ca +Mg) molar ratio was 0.05, 0.10, and 0.15, while the (Ca+Mg)/P ratio was maintained at 1.50 throughout the experiment. The influence of Mg-doped TCP on phase composition, chemical structure, and a functional group at different weight percentages were accomplished through X-ray diffraction (XRD), inductively coupled plasma optical emission spectroscopy (ICP-OES) and Fourier Transform Infrared Spectroscopy (FTIR) analyses. Based in the results of this research, the presence of magnesium led to the formation of Mg-doped calcium-deficient apatite (MgCDA) at 80°C and Mg-doped β-TCP at 850°C; the incorporation of Mg into the TCP phase causing an expansion of the lattice and increase in the lattice parameter. This result could be considered rather unusual.

scholarly journals Synthesis, Structural and Optical Characterization of Titanium Dioxide Doped by (Ce, Yb) Dedicated to Photonic Conversion

2019 ◽  
Vol 20 (1) ◽  
pp. 175
Author(s):  
Zobair El Afia ◽  
Mohamed Youssef Messous ◽  
Mohamed Cherkaoui ◽  
Mounia Tahri
Keyword(s):  
Rare Earth ◽  
Inductively Coupled Plasma ◽  
High Energy ◽  
Precipitation Method ◽  
X Ray Diffraction ◽  
Visible Absorption ◽  
X Ray ◽  
Inductively Coupled ◽  
Plasma Mass Spectrometry ◽  
Co Precipitation

The synthesis of TiO2 co-doped by (Ce, Yb) rare earth couple has been realized. This couple of rare earth can convert a high-energy photon to two low energy photons to enhance the energy efficiency of silicon solar cells. The undoped, 2% Ce doped- and (2% Ce, 4% Yb) Codoped- Titanium oxide were prepared by the co-precipitation method. The Infrared spectroscopy FTIR-ATR analysis indicates a continuous visible absorption in the 750–400 cm–1 region, confirming the formation of a titanium-oxygen bond. The X-Ray Diffraction characterization showed the dominance of the rutile crystalline phase with the presence of anatase one and the calculated crystallite size is between 7 to 13 nm. The X-Ray Fluorescence confirms the insertion of the dopants while the Inductively Coupled Plasma Mass Spectrometry ICP-MS showed the ratio 2 between Ce and Yb concentration. The thermogravimetric analysis indicated that Ce/Yb doped titanium was thermally stable. The absorption in the UV-visible (200 and 1000 nm) has been improved proportionally with the dopants.

Synthesis and Characterization of EuL3(phen) Luminescent Complex

2011 ◽  
Vol 239-242 ◽  
pp. 2488-2491
Author(s):  
Hui Juan Ren ◽  
De Hui Sun ◽  
Zhen Feng Cui ◽  
Guang Yan Hong
Keyword(s):  
Inductively Coupled Plasma ◽  
Atomic Emission ◽  
Precipitation Method ◽  
X Ray Diffraction ◽  
Crystalline Complex ◽  
X Ray ◽  
Inductively Coupled ◽  
Thermogravimetric Curve ◽  
Light Excitation

The europium(III)-benzoic acid(HL)-1,10-phenanthroline(phen) complex was synthesized in the ethanol-H2O system by a precipitation method. The morphology of the minicrystal complex with diameters of ca. 1.0 µm is characterized by scanning electron microscopy (SEM). Elemental analysis and inductively coupled plasma-atomic emission spectroscopy (ICP-AES) are used to determine the chemical composition of the complex. Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction analysis (XRD) are used to examine the structure of the complex. The results show that the complex is a new kind of crystalline complex and the composition of the complex is speculated to be EuL3(phen). The thermogravimetric curve (TGA) analysis indicates that the complex is stable below 232 °C in air. The photoluminescence analyses (PLA) exhibit that the complex emits the characteristic red fluorescence of Eu (III) ions at 613nm under ultraviolet light excitation.

Development of Plasma-Assisted Processing for Selenization and Sulfurization of Absorber Layers

2003 ◽  
Vol 763 ◽  
Author(s):  
S. Kosaraju ◽  
I. Repins ◽  
C. A. Wolden
Keyword(s):  
Inductively Coupled Plasma ◽  
Room Temperature ◽  
Optical Emission Spectroscopy ◽  
Plasma Processing ◽  
Optical Emission ◽  
X Ray Diffraction ◽  
X Ray ◽  
Inductively Coupled ◽  
Solar Absorbers ◽  
Copper Chalcopyrite

AbstractIn the synthesis of copper chalcopyrite solar absorbers the chalcogen source is always supplied in excess due to its low reactivity. This paper describes preliminary work aimed at addressing this issue through plasma processing. An inductively coupled plasma (ICP) was use to activate both sulfur and selenium vapors. First, the thermodynamic arguments for using activated chalcogens are presented. Next, this paper describes the experimental ICP setup and its characterization using optical emission spectroscopy (OES). Stable discharges have been achieved with both sulfur and selenium vapors using argon as a carrier gas. The potential of this approach was demonstrated by converting indium films into In2Se3 and InSx. The indium samples were inserted into chalcogen-containing ICP plasmas. Through X-ray diffraction it was observed that chalcogen conversion was achieved in a matter of minutes at room temperature by plasma processing.

Large-area quantification of BaCeO3 formation during processing of metalorganic-deposition-derived YBCO films

2007 ◽  
Vol 22 (4) ◽  
pp. 1077-1081 ◽  
Author(s):  
D.E. Wesolowski ◽  
M.J. Cima
Keyword(s):  
Inductively Coupled Plasma ◽  
Room Temperature ◽  
Buffer Layers ◽  
X Ray Diffraction ◽  
Large Area ◽  
Ybco Films ◽  
X Ray ◽  
Inductively Coupled ◽  
Metalorganic Deposition ◽  
Peak Areas

A method is described for the quantification of BaCeO3 formation during the growth of YBa2Cu3O7–x (YBCO) films on CeO2 buffer layers. The method is based on the selective etching of BaCeO3 followed by inductively coupled plasma (ICP) excitation spectroscopy. A 10% HNO3 solution, at room temperature, dissolved BaCeO3 and YBCO in minutes but did not significantly etch CeO2 films. ICP excitation spectroscopy was used to quantify the extent of the reaction over macroscopic areas of film (∼1 cm2). BaCeO3 peak areas were measured by x-ray diffraction (XRD) and calibrated to the ICP excitation spectroscopy results. XRD and ICP excitation spectroscopy results indicated that BaCeO3 formation through a metalorganic deposition (MOD)-derived CeO2 layer follows the parabolic growth law. Almost the entire ceria cap layer was consumed by the growth of BaCeO3 after 2 h at 760 °C in the MOD process examined. BaCeO3 growth was substantially slower at 725 °C; only 25 ± 3% of the ceria layer reacted.

scholarly journals Carbonate Hydroxyapatite and Silicon-Substituted Carbonate Hydroxyapatite: Synthesis, Mechanical Properties, and Solubility Evaluations

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
L. T. Bang ◽  
B. D. Long ◽  
R. Othman
Keyword(s):  
Mechanical Properties ◽  
Inductively Coupled Plasma ◽  
Physical And Mechanical Properties ◽  
Treatment Temperature ◽  
Precipitation Method ◽  
X Ray Diffraction ◽  
Ion Release ◽  
X Ray ◽  
Carbonate Hydroxyapatite ◽  
Inductively Coupled

The present study investigates the chemical composition, solubility, and physical and mechanical properties of carbonate hydroxyapatite (CO3Ap) and silicon-substituted carbonate hydroxyapatite (Si-CO3Ap) which have been prepared by a simple precipitation method. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), X-ray fluorescence (XRF) spectroscopy, and inductively coupled plasma (ICP) techniques were used to characterize the formation of CO3Ap and Si-CO3Ap. The results revealed that the silicate (SiO44-) and carbonate (CO32-) ions competed to occupy the phosphate (PO43-) site and also entered simultaneously into the hydroxyapatite structure. The Si-substituted CO3Ap reduced the powder crystallinity and promoted ion release which resulted in a better solubility compared to that of Si-free CO3Ap. The mean particle size of Si-CO3Ap was much finer than that of CO3Ap. At 750°C heat-treatment temperature, the diametral tensile strengths (DTS) of Si-CO3Ap and CO3Ap were about10.8±0.3and11.8±0.4MPa, respectively.

Sign in / Sign up

Export Citation Format

Share Document