Synthesis of and Characterization of Polyhedron of Mn2O3 Nanoparticles Using Spent Zn-Mn Batteries

2015 ◽  
Vol 1120-1121 ◽  
pp. 154-157 ◽  
Author(s):  
Fang Xu ◽  
Jun Xia Yin ◽  
Ming Yang
Keyword(s):  
High Efficiency ◽  
Average Diameter ◽  
Langmuir Model ◽  
Maximum Adsorption Capacity ◽  
X Ray ◽  
Adsorption Performance ◽  
Adsorption Data ◽  
Isotherm Adsorption ◽  
Scanning Electron

Polyhedron composed of Mn2O3nanoparticles with an average diameter of 0.5-1.0 μm have been prepared using spent Zn-Mn batteries. The product was characterized by X-ray powder diffraction and scanning electron microscope. The adsorption performance of polyhedron composed of Mn2O3 for 2-(5-Bromo-2-pyridylazo)-5-(diethylamino) phenol was investigated. The adsorbent showed high efficiency for the removal of 2-(5-Bromo-2-pyridylazo)-5-(diethylamino) phenol in water. The equilibrium of adsorption was achieved within 40 min. The isotherm adsorption data obeyed the Langmuir model, with a maximum adsorption capacity of 62 mg g-1.

Synthesis of Spherical Assembly Composed of Mn3O4 Nanoparticles and its Adsorption Behavior for Alizarin Red in Water

2011 ◽  
Vol 694 ◽  
pp. 165-169 ◽  
Author(s):  
Ming Yang ◽  
Qian Sun ◽  
Chen Fei Zhao ◽  
Xin Xin Sheng
Keyword(s):  
High Efficiency ◽  
Average Diameter ◽  
Langmuir Model ◽  
Maximum Adsorption Capacity ◽  
Alizarin Red ◽  
X Ray ◽  
Adsorption Performance ◽  
Adsorption Data ◽  
Isotherm Adsorption ◽  
Mn3o4 Nanoparticles

Spherical assembly composed of Mn3O4 nanoparticles with an average diameter of 400-600 nm have been prepared by a simple reactions between Ba(MnO4)2, H2SO4 and MnSO4 and thermal decomposition at 580 °C. The product was characterized by X-ray powder diffraction and scanning electron microscope. The adsorption performance of spherical assembly composed of Mn3O4 for alizarin red was investigated. The adsorbent showed high efficiency for the removal of alizarin red in water. The equilibrium of adsorption was achieved within 8 min. The isotherm adsorption data obeyed the Langmuir model, with a maximum adsorption capacity of 32.8 mg g-1.

Synthesis of Spherical Assembly Composed of MnO2 Nanoparticles Using Spent Zn-Mn Batteries

2012 ◽  
Vol 178-181 ◽  
pp. 1012-1015 ◽  
Author(s):  
Ming Yang ◽  
Guan Liu Zhang ◽  
Peng Fei Li ◽  
Xiao Ying Li ◽  
Cheng Chen
Keyword(s):  
High Efficiency ◽  
Average Diameter ◽  
Langmuir Model ◽  
Maximum Adsorption Capacity ◽  
Methyl Red ◽  
X Ray ◽  
Adsorption Performance ◽  
Mno2 Nanoparticles ◽  
Adsorption Data ◽  
Isotherm Adsorption

Spherical assembly composed of MnO2 nanoparticles with an average diameter of 0.8-2.0 μm have been prepared using spent Zn-Mn batteries. The product was characterized by X-ray powder diffraction and scanning electron microscope. The adsorption performance of spherical assembly composed of MnO2 for methyl red was investigated. The adsorbent showed high efficiency for the removal of methyl red in water. The equilibrium of adsorption was achieved within 30 min. The isotherm adsorption data obeyed the Langmuir model, with a maximum adsorption capacity of 92.6 mg g-1.

Characterization of Al65.0Cu32.9Co2.1 Alloy Containing Nanofibres

2012 ◽  
Vol 186 ◽  
pp. 212-215
Author(s):  
Jacek Krawczyk ◽  
Włodzimierz Bogdanowicz ◽  
Grzegorz Dercz ◽  
Wojciech Gurdziel
Keyword(s):  
Electron Microscopy ◽  
Average Diameter ◽  
Chemical Compositions ◽  
X Ray ◽  
Transmission Electron ◽  
Orthogonal Set ◽  
T Phase ◽  
Terminal Area ◽  
Scanning Electron

Microstructure of terminal area of Al65Cu32.9Co2.1ingots (numbers indicate at.%), obtained via directional solidification was studied. Scanning Electron Microscopy, Transmission Electron Microscopy and X-ray powder diffraction were applied. Point microanalysis by Scanning Electron Microscope was used for examination of chemical compositions of alloy phases. It was found that tetragonal θ phase of Al2Cu stoichiometric formula was the dominate phase (matrix). Additionally the alloy contained orthogonal set of nanofibres of Al7Cu2Co T phase with the average diameter of 50-500 nm and oval areas of hexagonal Al3(Cu,Co)2H-phase, surrounded by monoclinic AlCu η1phase rim. Inside some areas of H-phase cores of decagonal quasicrystalline D phase were observed.

Preparation of TiO2-ACF by Electrospinning and its Adsorption Performance for Low Concentration SO2

2014 ◽  
Vol 852 ◽  
pp. 51-55 ◽  
Author(s):  
Tie Ben Song ◽  
Yan Bo Wu ◽  
Peng Sun ◽  
Jun Bi
Keyword(s):  
Average Diameter ◽  
Activated Carbon Fiber ◽  
Adsorption Rate ◽  
X Ray Diffraction ◽  
High Adsorption ◽  
Adsorption Time ◽  
X Ray ◽  
Low Concentration ◽  
Adsorption Performance ◽  
Scanning Electron

The TiO2-activated carbon fiber (ACF) was successfully prepared by electrospinning and thermal treatment. The nanofiber was characterized by scanning electron microscopy (SEM), thermogravimetric-differential thermal analysis (TG-DTA), X-ray diffraction (XRD) and Brunner-Emmett-Teller method (BET). The results showed that the average diameter of ACF was in the range 200-500 nm, and the preoxidation temperature and carbonation temperature were 250°C and 500°C, and the anatase TiO2 appeared in fiber after carbonation, and TiO2-ACF specific surface area was 1146.7 m2/g. The TiO2-ACF was used for adsorption of low concentration SO2. The results showed that the adsorption rate increased with an increase in SO2 concentration, furthermore the adsorption rate increased with prolonged adsorption time, the high adsorption rate was 67.6% after 40 min. While temperature was below 60°C, the adsorption rate decreased as the temperature increased, however when temperature was above 60°C, there was a slight increase of adsorption rate as the temperature increased.

Synthesis and Characterization of Flower-Like Hematite Nanostructures

2011 ◽  
Vol 287-290 ◽  
pp. 169-172
Author(s):  
Hong Wang ◽  
Xi Yang He ◽  
Ying Wang
Keyword(s):  
Electron Microscopy ◽  
Average Length ◽  
Critical Role ◽  
Average Diameter ◽  
Synthesis And Characterization ◽  
Hydrothermal Route ◽  
X Ray ◽  
Scanning Electron

The flower-like α-Fe2O3superstructures were fabricated by a novel hydrothermal route and sequential annealing at 600 °C for 1 h using FeCl3×6H2O as the starting precursor. The structures and morphologies of the synthesized flower-like superstructures have been characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM). It is revealed that the flower-like α-Fe2O3nanostructures consist of nanorods with the average diameter of about 70 nm and an average length of about 200nm growing from the centers. The critical role of urea in the hydrothermal synthesis of the flower-like nanostructures is discussed.

scholarly journals The adsorption behavior and mechanism investigation of Cr(VI) ions removal by poly(2-(dimethylamino)ethyl methacrylate)/poly(ethyleneimine) gels

2015 ◽  
Vol 80 (7) ◽  
pp. 889-902 ◽  
Author(s):  
Zhengbo Hou ◽  
Weixia Zhu ◽  
Hang Song ◽  
Pengfei Chen ◽  
Shun Yao
Keyword(s):  
Photoelectron Spectroscopy ◽  
Adsorption Process ◽  
Interaction Mechanism ◽  
Langmuir Model ◽  
Adsorption Behavior ◽  
Maximum Adsorption Capacity ◽  
X Ray ◽  
Ethyl Methacrylate ◽  
Pseudo Second Order ◽  
Scanning Electron

The composite hydrogels based on N,N?-dimethylamino ethyl methacrylate (DMAEMA) and polyethyleneimine (PEI) were prepared by amino radical polymerization and confirmed by Fourier Transform Infrared Spectra (FTIR) and elemental analysis. Then adsorption behavior and mechanism of Cr(VI) ions on the obtained materials were investigated with scanning electron microscope, Zeta potential and thermal gravity analysis, etc. The adsorption process was found to follow the pseudo-second order kinetics and Langmuir model, and the maximum adsorption capacity of Cr(VI) ions reached 122.8 mg g-1. X-ray photoelectron spectroscopy (XPS) and pH analysis revealed that the Cr(VI) ions were adsorbed into the gels through electrostatic interaction mechanism, and SO42- in the solution had a great effect on the adsorption process. In addition, high pH and ionic strength could reduce the uptakes of adsorbate, which could be used for desorption of Cr(VI) ions from the gels.

Adsorption of Mercury Ion on Activated Carbons from Rice Husk

2012 ◽  
Vol 161 ◽  
pp. 162-166 ◽  
Author(s):  
Xiao Lan SONG ◽  
Ying Zhang ◽  
Cheng Yin Yan ◽  
Wen Juan Jiang ◽  
Hong Jiang Xie
Keyword(s):  
Activated Carbon ◽  
Adsorption Capacity ◽  
Rice Husk ◽  
Activated Carbons ◽  
Langmuir Model ◽  
Mercury Ion ◽  
Maximum Adsorption Capacity ◽  
Adsorption Performance ◽  
Monolayer Adsorption ◽  
Adsorption Data

The adsorption performance of mercury ion onto activated carbon prepared from rice husk with NaOH was carried out at initial concentration of 100 mg/L. The activated carbon obtained at 800 °C possessed the outstanding specific surface area of 2786 m2/g. And the results showed that the maximum adsorption capacity of Hg2+ was recorded as 342.0 mg/g due to abundant micropores of 1.076 nm. In addition, the adsorption data were well explained by the Langmuir model with the monolayer adsorption capacity of 555.6 mg/g.

Synthesis of Spinous Spheres of Mn3O4 Nanoparticles and its Adsorption Behavior for 1-Naphthyl Ethylene Diamine-4-Azobenzene-4'-Sulfonic Acid

2014 ◽  
Vol 915-916 ◽  
pp. 747-750
Author(s):  
Ming Yang ◽  
Juan Juan Xia ◽  
Yu Huang ◽  
Miao Wang ◽  
Dai Xiong Li
Keyword(s):  
Thermal Decomposition ◽  
Sulfonic Acid ◽  
High Efficiency ◽  
Ethylene Diamine ◽  
Manganese Acetate ◽  
Contaminated Water ◽  
X Ray ◽  
Adsorption Performance ◽  
Cationic Monomer ◽  
Scanning Electron

Spinous spheres of Mn3O4nanoparticles have been successfully prepared using cationic monomer doped manganese acetate as precursory solid and thermal decomposition at 400 oC. The product was characterized by X-ray powder diffraction and scanning electron microscope. The adsorption performance of spinous spheres composed of Mn3O4for 1-Naphthyl ethylene diamine-4-azobenzene-4-sulfonic acid was investigated. The adsorbent showed high efficiency for the decolorization of 1-Naphthyl ethylene diamine-4-azobenzene-4-sulfonic acid for in contaminated water.

The Use of Advanced Analytical Techniques for Characterization of the Chemical, Physical, and Crystallographic Nature of a Surface

1973 ◽  
Vol 31 ◽  
pp. 132-133 ◽  
Author(s):  
R. E. Herfert
Keyword(s):  
Surface Characterization ◽  
Analytical Techniques ◽  
X Ray Diffraction ◽  
Depth Of Penetration ◽  
X Ray ◽  
The Past ◽  
Transmission Electron ◽  
Scanning Electron

Studies of the nature of a surface, either metallic or nonmetallic, in the past, have been limited to the instrumentation available for these measurements. In the past, optical microscopy, replica transmission electron microscopy, electron or X-ray diffraction and optical or X-ray spectroscopy have provided the means of surface characterization. Actually, some of these techniques are not purely surface; the depth of penetration may be a few thousands of an inch. Within the last five years, instrumentation has been made available which now makes it practical for use to study the outer few 100A of layers and characterize it completely from a chemical, physical, and crystallographic standpoint. The scanning electron microscope (SEM) provides a means of viewing the surface of a material in situ to magnifications as high as 250,000X.

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