Synthesis and Characterization of Nanosize Molybdenum Disulfide Particles by Quick Homogeneous Precipitation Method

2007 ◽  
pp. 2107-2110
Author(s):  
Kun Hong Hu ◽  
Xian Guo Hu ◽  
Xiao Jun Sun ◽  
He Feng Jing ◽  
Song Zhan
Keyword(s):  
Molybdenum Disulfide ◽  
Precipitation Method ◽  
Synthesis And Characterization ◽  
Homogeneous Precipitation ◽  
Homogeneous Precipitation Method

Synthesis and Characterization of BaCO3 Nanoparticles with Different Morphologies by Microwave Homogenous Precipitation

2013 ◽  
Vol 32 (1) ◽  
pp. 47-50
Author(s):  
Guo Chen ◽  
Jin Chen ◽  
Lijun Liu ◽  
C. Srinivasakannan ◽  
Jinhui Peng
Keyword(s):  
Raw Materials ◽  
Precipitation Method ◽  
Synthesis And Characterization ◽  
Homogeneous Precipitation ◽  
Tetraacetic Acid ◽  
X Ray ◽  
Homogeneous Precipitation Method ◽  
Scanning Electron ◽  
Composition Of Products

AbstractBaCO3 nanoparticles with different morphologies including needle-like, rod-like, bird's nest-like and flower-like have been successfully synthesized by the microwave homogeneous precipitation method using BaCl2·2H2O, NaOH and (NH2)2CO as raw materials with the help of different guide reagents, such as citric acid (CA), sodium triphosphate (STPP) and ethylene diamine tetraacetic acid (EDTA). Their phases and morphologies were characterized by X-ray powder diffraction (XRD) and scanning electron microscopy (SEM), respectively. The characterization results show that different guide reagents have little effect on the phase structure and composition of products while they play significant roles in determining the morphology of products. All the synthesized BaCO3 nanoparticles have typical orthorhombic structures that are well-crystallized.

scholarly journals Synthesis and Characterization of Hollow Magnetic Alloy (GdNi2, Co5Gd) Nanospheres Coated with Gd2O3

2014 ◽  
Vol 2014 ◽  
pp. 1-9
Author(s):  
Wang Li ◽  
Fa-gen Li ◽  
Jun Wang ◽  
Guo-meng Zhao
Keyword(s):  
Large Scale ◽  
Precipitation Method ◽  
Synthesis And Characterization ◽  
Magnetic Alloy ◽  
Homogeneous Precipitation ◽  
Hollow Nanospheres ◽  
Magnetic Nanospheres ◽  
Homogeneous Precipitation Method ◽  
Potential Applications

Uniform magnetic hollow nanospheres (GdNi2, Co5Gd) coated with Gd2O3have been successfully prepared on a large scale via a urea-based homogeneous precipitation method using silica (SiO2) spheres as sacrificed templates, followed by subsequent heat treatment. Nitrogen sorption measurements and scanning electron microscope reveal that these hollow-structured magnetic nanospheres have the mesoporous shells that are composed of a large amount of uniform nanoparticles. After reduction treatment, these nanoparticles exhibit superparamagnetism that might have potential applications in medicine. Furthermore, the developed synthesis route may provide an important guidance for the preparation of other multifunctional hollow spherical materials.

Synthesis and Characterization of Hexagonal Prismatic Ca10(PO4)6(OH)2 Prepared by Homogeneous Precipitation Method

2011 ◽  
Vol 391-392 ◽  
pp. 1239-1243
Author(s):  
Zhan Hui Zhang ◽  
Zhi Liang Huang ◽  
Jian Qiu Li ◽  
Ru An Chi ◽  
Yue Hua Hu ◽  
...  
Keyword(s):  
Growth Process ◽  
Crystal Morphology ◽  
Precipitation Method ◽  
Synthesis And Characterization ◽  
Hexagonal Prism ◽  
Homogeneous Precipitation ◽  
X Ray Diffraction ◽  
X Ray ◽  
Homogeneous Precipitation Method

Hexagonal prismatic hydroxyapatite (Ca10(PO4)6(OH)2, HAP) was successfully prepared by a homogeneous precipitation method. The products were characterized by X-ray diffraction, Fourier transform infrared spectrum, and scanning electron microscope. The growth process of the hexagonal prism was surveyed in detail based on the effects of the reaction time on the phase composition and the crystal morphology.

Synthesis and characterization of TiO2 nanocrystalline powder prepared by homogeneous precipitation using urea

2003 ◽  
Vol 18 (3) ◽  
pp. 571-577 ◽  
Author(s):  
Dong Seok Seo ◽  
Hwan Kim ◽  
Hang Chul Jung ◽  
Jong Kook Lee
Keyword(s):  
Particle Size ◽  
Particle Shape ◽  
Elevated Temperatures ◽  
Treatment Temperature ◽  
Precipitation Method ◽  
Nanocrystalline Powder ◽  
Homogeneous Precipitation ◽  
Homogeneous Precipitation Method ◽  
Good Crystallinity

TiO2 nanocrystalline powder was synthesized by homogeneous precipitation method using urea, and its characteristics were investigated through comparison with the powder prepared by conventional precipitation using ammonia. The homogeneously precipitated powder was anatase-type TiO2 with a particle size of 4–5 nm and a uniform spherical particle shape. The fact that the transformation from anatase to rutile was prohibited at elevated temperatures in the homogeneously precipitated powder can be useful to prepare anatase-type TiO2 thin films by calcination at high temperatures. With increasing heat-treatment temperature, the particle size of the homogeneously precipitated powder was smaller than that of the conventionally precipitated powder, and the particle shape was more uniform. The homogeneously precipitated powder showed good photocatalytic activity for Ag ion photoadsorption because the powder had both good crystallinity and a large specific surface area of 280 m2/g.

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