Preparation and growth mechanism of plate-like basic magnesium carbonate by template-mediated/homogeneous precipitation method

2018 ◽  
Vol 25 (4) ◽  
pp. 729-735 ◽  
Author(s):  
Juan Chen ◽  
Zhi-liang Huang ◽  
Chang-lian Chen ◽  
Wen-zhao Li ◽  
Wei-rong Xu
Keyword(s):  
Growth Mechanism ◽  
Magnesium Carbonate ◽  
Precipitation Method ◽  
Homogeneous Precipitation ◽  
Homogeneous Precipitation Method

Synthesis of Porous Basic Magnesium Carbonate Crystallographic Materials with Flower-Like Structure

2016 ◽  
Vol 723 ◽  
pp. 444-449 ◽  
Author(s):  
Juan Chen ◽  
Zhi Liang Huang ◽  
Wen Zhao Li
Keyword(s):  
Electron Microscopy ◽  
Magnesium Carbonate ◽  
Precipitation Method ◽  
Homogeneous Precipitation ◽  
Experimental Equipment ◽  
X Ray Diffraction ◽  
X Ray ◽  
Homogeneous Precipitation Method ◽  
Chloride Hexahydrate ◽  
Scanning Electron

The porous basic magnesium carbonate (Mg5(CO3)4(OH)2.4H2O) crystal crystallographic materials with flower-like structure were prepared successfully by homogeneous precipitation method. Magnesium chloride hexahydrate (MgCl2.6H2O) and urea (CO(NH2)2) wereused as reaction materials. The experimental equipment was held at 100°C for 8 h. Phase and morphology of the product were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The formation mechanism of the product was investigated. It was found that the CO2 bubbles acted as porous templates. The growth and gathering of the CO2 bubbles induced the growth of the MgCO3.3H2O columnar crystals. Then the dissolution of the MgCO3.3H2O and the deposition of Mg5(CO3)4(OH)2.4H2O happened simultaneously. Finally the disappearance of MgCO3.3H2O brought about the formation of the porous structure.

Luminescence Properties of Europium-Doped Yttrium Oxides Derived from Their Dodecylsulfate-Templated Mesostructure and Nanotube Forms

2003 ◽  
Vol 775 ◽  
Author(s):  
Tsuyoshi Kijima ◽  
Kenichi Iwanaga ◽  
Tomomi Hamasuna ◽  
Shinji Mohri ◽  
Mitsunori Yada ◽  
...  
Keyword(s):  
Room Temperature ◽  
Broad Band ◽  
Concentration Quenching ◽  
Precipitation Method ◽  
Homogeneous Precipitation ◽  
Bulk Materials ◽  
Main Band ◽  
Homogeneous Precipitation Method ◽  
Order Of Magnitude ◽  
Weak Luminescence

AbstractEuropium-doped hexagonal-mesostructured and nanotubular yttrium oxides templated by dodecylsulfate species as well as surfactant free bulk oxides were synthesized by the homogeneous precipitation method. All the as grown nanostructured or bulk materials with amorphous or poorly crystalline frameworks showed weak luminescence bands at room temperature. On calcination at 1000°C these materials were converted into highly crystalline yttrium oxides, resulting in a total increase in intensity of all the bands by one order of magnitude. In the hexagonal-mesostructured system, the main band due to the 5D0-7F2 transition for the calcined phases showed a sharp but asymmetrical multiplet splitting indicating multiple Eu sites. Concentration quenching was found at a Eu content of 3 mol% or above for these phases. In contrast, the main emission for the calcined solids in the nanotubular system occurred as poorly resolved broad band and the intensity of the main band at higher Eu content was significantly enhanced compared with those for the other two systems.

Preparation of α-Ni(OH)2 with Flowerlike Hierarchical Architectures via Homogeneous Precipitation Method

2011 ◽  
Vol 284-286 ◽  
pp. 684-687
Author(s):  
Chang Yu Li ◽  
Li Li Liu ◽  
Shou Xin Liu
Keyword(s):  
Electron Microscopy ◽  
Precipitation Method ◽  
Homogeneous Precipitation ◽  
X Ray ◽  
Homogeneous Precipitation Method ◽  
Α Phase ◽  
Transmission Electron ◽  
Hierarchical Architectures ◽  
Flowerlike Structure ◽  
Adsorption Desorption

Without using any templates or surfactants, flowerlike α-nickel hydroxide (Ni(OH)2) was successfully synthesized by homogeneous precipitation method. The prepared products were characterized by X-ray powder diffraction (XRD), high-resolution transmission electron microscopy (HRTEM) and N2 adsorption-desorption. The prepared Ni(OH)2 is α-phase with specific surface area of 245.0 m2/g and shows flowerlike structure with 4-6 um in diameter.

Syntheses of ultra-fine barium carbonate powders by homogeneous precipitation method

2016 ◽  
Vol 5 (2) ◽  
Author(s):  
Guo Chen ◽  
Jin Chen ◽  
Jinhui Peng
Keyword(s):  
Barium Carbonate ◽  
Barium Chloride ◽  
Precipitation Method ◽  
Homogeneous Precipitation ◽  
Chloride Dihydrate ◽  
Homogeneous Precipitation Method

AbstractUltra-fine barium carbonate powders were successfully synthesized using barium chloride dihydrate (BaCl

Effect of surfactants on synthesis of TiO2 nano-particles by homogeneous precipitation method

2008 ◽  
Vol 188 (1) ◽  
pp. 52-54 ◽  
Author(s):  
Hui Wang ◽  
Pingan Liu ◽  
Xiaosu Cheng ◽  
Anze Shui ◽  
Lingke Zeng
Keyword(s):  
Nano Particles ◽  
Precipitation Method ◽  
Homogeneous Precipitation ◽  
Homogeneous Precipitation Method

Preparation of Fine Ag2WO4 Antibacterial Powders and Its Application in the Sanitary Ceramics

2011 ◽  
Vol 284-286 ◽  
pp. 1321-1325 ◽  
Author(s):  
Qian Ping Wang ◽  
Xiang Xiong Guo ◽  
Wei Hua Wu ◽  
Shu Xian Liu
Keyword(s):  
Antibacterial Activities ◽  
Antimicrobial Action ◽  
Precipitation Method ◽  
Homogeneous Precipitation ◽  
Antibacterial Mechanism ◽  
Homogeneous Precipitation Method ◽  
Bactericidal Effects

Superfine Ag2WO4 antibacterial powders, which are prepared by supersonic assisted homogeneous precipitation method, is added 1.0-1.5wt.% to sanitary ceramics, having 90% antimicrobial action, and achieve good bactericidal effects. The antibacterial ceramics with Ag2WO4 were soaked into acid and alkali for 3 months, and antibacterial activities had little change, keeping good antimicrobial durability. Finally, the antibacterial mechanism of Ag2WO4 ceramics is advanced.

Enhanced adsorption removal of methyl orange from aqueous solution by nanostructured proton-containing δ-MnO2

2015 ◽  
Vol 3 (10) ◽  
pp. 5674-5682 ◽  
Author(s):  
Yan Liu ◽  
Chao Luo ◽  
Jian Sun ◽  
Haizhen Li ◽  
Zebin Sun ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Methyl Orange ◽  
Solid State ◽  
Solid State Reaction ◽  
Proton Exchange ◽  
Precipitation Method ◽  
Homogeneous Precipitation ◽  
Adsorption Removal ◽  
Homogeneous Precipitation Method ◽  
Enhanced Adsorption

Two nanostructured proton-containing δ-MnO2 (H-δ-MnO2) materials were synthesized through proton exchange for K-containing δ-MnO2 (K-δ-MnO2) nanosheets and nanoparticles prepared by the hydrothermal homogeneous precipitation method and solid-state reaction.

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