scholarly journals Synthesis of BiVO4 nanoparticles by the co-precipitation method and study the crystal structure, optical and photocatalytic properties of them

2020 ◽  
Vol 28 (3) ◽  
pp. 797-806
Author(s):  
نسرین قزکوب ◽  
مرتضی زرگرشوشتری ◽  
ایرج کاظمی‌نژاد ◽  
سید محمد لاری بقال ◽  
◽  
...  
Keyword(s):  
Crystal Structure ◽  
Photocatalytic Properties ◽  
Precipitation Method ◽  
Co Precipitation

Crystal structure and magnetic properties of Gd–Cu substituted M-type Sr-hexaferrites synthesized by the co-precipitation method

2019 ◽  
Vol 546 (1) ◽  
pp. 48-56
Author(s):  
Ze Wu ◽  
Yang Song ◽  
Ruonan Zhang ◽  
Lianwei Shan ◽  
Limin Dong ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Precipitation Method ◽  
Co Precipitation

Structural and spectroscopic investigations on the quenching free luminescence of europium oxalate nanocrystals

2019 ◽  
Vol 75 (5) ◽  
pp. 589-597 ◽  
Author(s):  
Dinu Alexander ◽  
Kukku Thomas ◽  
Monu Joy ◽  
P. R. Biju ◽  
N. V. Unnikrishnan ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Structure Analysis ◽  
Focal Point ◽  
Structural Features ◽  
Crystal Structure Analysis ◽  
Precipitation Method ◽  
Tem Analysis ◽  
Transmission Electron ◽  
Purity Evaluation ◽  
Co Precipitation

The structural features leading to the intense quenching free luminescence exhibited by europium oxalate nanocrystals, poly[[hexaaquatri-μ2-oxalato-dieuropium] 4.34-hydrate], {[Eu2(C2O4)3(H2O)6]·4.34H2O} n , is the focal point of this report. Europium oxalate nanocrystals were synthesized by a simple microwave-assisted co-precipitation method. Powder X-ray diffraction analysis revealed the monoclinic structure of the nanocrystals and the phase purity. The morphology and particle size were examined by transmission electron microscopy (TEM) analysis. Luminescence measurements on a series of samples of La2–x Eu x (C2O4)3·10H2O, with x varying in the range 0.1 to 2, established the quenching free nature exhibited by the europium oxalate nanocrystals. A single-crystal structure analysis was carried out and the quenching free luminescence is explained on the basis of the crystal structure. A detailed photoluminescence characterization was carried out using excitation and emission studies, decay analysis, and CIE coordinate and colour purity evaluation. The various spectroscopic parameters were evaluated by Judd–Ofelt theoretical analysis and the results are discussed on the basis of the crystal structure analysis.

Crystal structure and magnetic properties of LaFe1-Ni O3 nanomaterials prepared via a simple co-precipitation method

2019 ◽  
Vol 45 (17) ◽  
pp. 21768-21772 ◽  
Author(s):  
Tien A. Nguyen ◽  
Vinh N.T. Pham ◽  
Hanh T. Le ◽  
Diem H. Chau ◽  
V.O. Mittova ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Precipitation Method ◽  
Co Precipitation

Synthesis of YAG Powders by Co-Precipitation Method

2014 ◽  
Vol 602-603 ◽  
pp. 110-113 ◽  
Author(s):  
Yan Juan Li ◽  
Ying Chun Zhang ◽  
Jia Xun Leng
Keyword(s):  
Crystal Structure ◽  
Metal Ion ◽  
Yttrium Aluminum Garnet ◽  
Raw Materials ◽  
Nitrate Solution ◽  
Particle Size Analysis ◽  
Precipitation Method ◽  
Size Analysis ◽  
Yttrium Nitrate ◽  
Co Precipitation

In this paper, yttrium aluminum garnet (YAG) powders were synthesized by the normal-strike co-precipitation method (adding precipitant solution to the metal nitrate solution). Aluminum nitrate (Al (NO3)39H2O) and yttrium nitrate (Y(NO3)36H2O) were used as raw materials and ammonium hydrogen carbonate (AHC) was used as the precipitant. The precursor was calcined at the temperature of 900-1200 °C for 2 hours. The crystal structure and microstructure of YAG powders were investigated and analyzed by XRD, FESEM, TG-DTA and laser particle size analysis. The results show that the concentration of metal ion and AHC have a significant effect on crystal structure of YAG powders, and pure YAG powders were obtained at 1000 °C when the concentration of Al3+was 0.1 mol/L and the concentration of AHC was 1 mol/L. The average primary crystallites particle sizes were ranged from 50 nm to100 nm in diameter. nanosize YAG powders with excellent properties and good dispersity can be produced at the temperature of 1100 °C.

Crystal structure and magnetic properties of perovskite YFe1-xMnxO3 nanopowders synthesized BY CO-PRECIPITATION method

2019 ◽  
Vol 96 ◽  
pp. 105922 ◽  
Author(s):  
A.T. Nguyen ◽  
Vinh N.T. Pham ◽  
T. Tr L. Nguyen ◽  
V.O. Mittova ◽  
Q.M. Vo ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Precipitation Method ◽  
Co Precipitation

Synthesis and Fluorescence Properties of Water-Soluble L-Cysteine-Modified ZnSe:Ag Quantum Dots

2014 ◽  
Vol 1033-1034 ◽  
pp. 1172-1175
Author(s):  
Li Ping Lin ◽  
Feng Hua Huang ◽  
Pei Feng Chen
Keyword(s):  
Crystal Structure ◽  
Quantum Dots ◽  
Optical Properties ◽  
Absorption Spectrum ◽  
Photoluminescence Spectrum ◽  
Water Soluble ◽  
Precipitation Method ◽  
X Ray ◽  
Surface Modifier ◽  
Co Precipitation

The water-soluble ZnSe:Ag quantum dots were synthesized in aqueous medium by chemical co-precipitation method with L-cysteine as surface modifier. The crystal structure and optical properties of the obtained ZnSe:Ag quantum dots have been characterized by X-ray power diffraction, infrared spectrum, UV-Vis absorption spectrum and photoluminescence spectrum. Results indicate that ZnSe:Ag quantum dots belong to the cubic blende structure and have good fluorescent characteristics. The L-cysteine modified on the surface of ZnSe:Ag quantum dots renders the quantum dots water-soluble, biocompatible.

scholarly journals Crystal Structure and Magnetic Properties of Zn Doped Barium M-Hexaferrite

2015 ◽  
Vol 1112 ◽  
pp. 19-22
Author(s):  
Umi Nuraini ◽  
Lita Amalia ◽  
Kurniawati C. Rosyidah ◽  
M. Zainuri
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Peak Position ◽  
Hexagonal Structure ◽  
Precipitation Method ◽  
Soft Magnetic ◽  
A Value ◽  
Coercivity Field ◽  
Co Precipitation ◽  
Slight Displacement

Synthesis of Zn doped Barium M-Hexaferrite (BaFe12-xZnxO19) has been performed by co-precipitation method. The purified iron sand from Tulungagung is used as a precursor of Fe3O4. Synthesis of Zn doped Barium M-Hexaferrite (BaFe12-xZnxO19) with variations of x = 0.3, 0.5, and 0.7 wt % has been calcined at temperatures of 1000°C for 5 hours. Ion Zn2+ (with 0 ≤ x ≤ 0.7 wt %) does not change the crystal structure of Barium M-Hexaferrite (BaM), but give a slight displacement of the peak position of the diffraction pattern. SEM figures showed that Zn doped Barium M-Hexaferrite (BaFe12-xZnxO19) have a hexagonal structure, similar to BaM structure. Doping of Zn has changed the magnetic properties of Barium M-Hexaferrit (BaM), from hard magnetic become soft magnetic. Barium M-Hexaferrit (BaM) has a value of Coercivity Field (Hc) and Remanence Magnetization (Mr) is 0.03734 T and 8.334 emu/g. At variation x = 0.3, the Remanence Magnetization (Mr) reaches the highest value. At this point, a value of Coercivity Field (Hc) and Remanence Magnetization (Mr) is 0.0506 T and 14.782 emu/gram respectively.

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