Synthesis, Characterization and Growth Mechanism of Nano-Scale Hydroxyl Magnesium Silicate

2010 ◽  
Vol 92 ◽  
pp. 263-270
Author(s):  
Fei Gao ◽  
Yi Xu ◽  
Bin Shi Xu ◽  
Bao Sen Zhang
Keyword(s):  
Electron Microscope ◽  
Growth Mechanism ◽  
Magnesium Silicate ◽  
Nano Particles ◽  
Hydrothermal Conditions ◽  
Monoclinic Crystal ◽  
Nano Scale ◽  
System A ◽  
Transmission Electron ◽  
Sem Micrograph

Nano-scale hydroxyl magnesium silicate was synthesized successfully by using hydrothermal method. The composition of as-prepared powder was proved chrysotile which adheres to monoclinic crystal system (a kind of hydroxyl magnesium silicate) by using X-ray Diffraction (XRD) technology. The morphology and microstructure of chrysotile powder were characterized by using scanning electron microscope (SEM) and transmission electron microscope (TEM). Nano-particles and nano-rods were observed in SEM micrograph. Moreover, smaller-size nano-particles and nano-fibres were observed by using TEM. Based on results of SEM and TEM, the growth mechanism of chrysotile powder under hydrothermal conditions was discussed.

scholarly journals MICROWAVE ASSISTED SYNTHESIS AND STRUCTURAL CHARACTERIZATION OF NICKEL OXIDE NANOPARTICLES

2016 ◽  
Vol 3 (1) ◽  
pp. 12-14
Author(s):  
Kalpanadevi K ◽  
Manimekalai R
Keyword(s):  
Electron Microscope ◽  
Nickel Oxide ◽  
Structural Characterization ◽  
Nano Particles ◽  
Microwave Assisted Synthesis ◽  
Nio Nanoparticles ◽  
Nickel Oxide Nanoparticles ◽  
Transmission Electron ◽  
Good Crystallinity

Nickel oxide (NiO) nano-particles were produced via a simple microwave method from the Ni(OH)2 precursor, which was obtained by slow drop-wise addition of 0.1M sodium hydroxide to 0.1M nickel nitrate. The mixture was vigorously stirred until the pH reached 7.2. The mixture was then irradiated with microwave to deposit Ni(OH)2 at a better precipitation rate. Drying the precipitate at 320°C resulted in formation of NiO nanoparticles. High Resolution Transmission Electron Microscope (HRTEM), Scanning Electron Microscope (SEM) and X-ray diffraction (XRD), employed for the structural characterization of the as-prepared NiO nanoparticles, revealed their good crystallinity and high-purity. Microwave irradiation increased homogeneity and decreased the mean particle size of the produced NiO particles.

Preparation and Characterization of Magnetic Strong-Base Anion Exchange Resin

2011 ◽  
Vol 239-242 ◽  
pp. 1838-1841 ◽  
Author(s):  
Chen Dong Shuang ◽  
Feng Yang ◽  
Yang Zhou ◽  
Peng Hui Li ◽  
Ai Min Li
Keyword(s):  
Electron Microscope ◽  
Anion Exchange ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Nano Particles ◽  
Nano Particle ◽  
Strong Base ◽  
Transmission Electron ◽  
Ft Ir ◽  
Magnetic Nano Particles

The magnetic copolymer was prepared by polymerization of glycidyl methacrylate (GMA) and divinylbenzene (DVB) in the presence of OA-modified magnetic nano-particles. The magnetic strong-base anion exchange resin (MAER) was formed by quaternization of magnetic copolymer. Transmission electron microscope (TEM) and scanning electron microscope (SEM) were used for observation of prepared magnetic nano-particle and MAER, respectively. FT-IR spectrometer was used to characterize the magnetic nano-particle and MAER. To explore the potential application of MAER for natural organic matter (NOM) removal, completely-mixed (CMC) mode was used for humic acid (HA) adsorption. It was found that the HA removal for CMC mode with MAER resin was 10~20% higher than conventional process before breakthrough.

scholarly journals FEI Titan 80-300 STEM

2016 ◽  
Vol 2 ◽  
Author(s):  
Marc Heggen ◽  
Martina Luysberg ◽  
Karsten Tillmann
Keyword(s):  
Electron Microscope ◽  
Scanning Transmission Electron Microscope ◽  
Electron Gun ◽  
Lens System ◽  
Scanning Transmission Electron ◽  
System A ◽  
Transmission Electron ◽  
The World ◽  
Scanning Transmission ◽  
Electron Microscopes

The FEI Titan 80-300 STEM is a scanning transmission electron microscope equipped with a field emission electron gun, a three-condenser lens system, a monochromator unit, and a Cs probe corrector (CEOS), a post-column energy filter system (Gatan Tridiem 865 ER) as well as a Gatan 2k slow scan CCD system. Characterised by a STEM resolution of 80 pm at 300 kV, the instrument was one of the first of a small number of sub-ångström resolution scanning transmission electron microscopes in the world when commissioned in 2006.

scholarly journals Hybrid Ag2O/ZnO Heterostructures

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Jing Wang ◽  
Yang Liu ◽  
Yang Jiao ◽  
Fengyu Qu ◽  
Qingzhi Pan ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Powder Diffraction ◽  
Growth Mechanism ◽  
Spectroscopy Analysis ◽  
X Ray ◽  
Transmission Electron ◽  
Step Procedure ◽  
Intrinsic Emission ◽  
Scanning Electron

The well-aligned Ag2O/ZnO microflowers heterostructure was synthesized by a straightforward two-step procedure. The diameters of the as-synthesized products were as much as 1.5 μm. The as-grown Ag2O/ZnO heterostructure was investigated by X-ray powder diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), and photoluminescence (PL) spectroscopy analysis. A possible growth mechanism for flowerlike Ag2O/ZnO heterostructure was proposed based on the experimental results. Compared with pure ZnO microflowers, PL spectrum of the composite with only one strong peak at 383 nm showed good intrinsic emission.

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