Modification of Al2O3 Microfiltration Membrane by Nano-ZnO Coating

2007 ◽  
Vol 280-283 ◽  
pp. 1045-1048 ◽  
Author(s):  
Jianer Zhou ◽  
Jian Qing Wu ◽  
Yong Qing Wang ◽  
Wei Hui Jiang ◽  
Guang Hua Ma ◽  
...  
Keyword(s):  
Raw Materials ◽  
Zinc Nitrate ◽  
Precipitation Method ◽  
Homogeneous Precipitation ◽  
Test Results ◽  
Nano Zno ◽  
Microfiltration Membrane ◽  
Homogeneous Precipitation Method ◽  
Modified Membrane ◽  
Α Al2o3

In this paper, the α-Al2O3 microfiltration membrane modified by nano-ZnO coating was obtained using zinc nitrate and urea as raw materials via homogeneous precipitation method. The effects of reaction temperature and coating times on the modification of the membrane were emphatically studied. The test results show that the flux of modified membrane is raised by 43% when the nano-ZnO particles (5 ~ 10 nm) are smoothly and densely coated on the surface of the membrane. The mechanism of the modification was studied by means of TEM, FTIR, XPS, Zeta electric potential analyzer, etc.

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.

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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