Preparation of Superhydrophilic Polyethersulfone by Sol-Gel Method

2013 ◽  
Vol 785-786 ◽  
pp. 1547-1550
Author(s):  
Guang Fen Li ◽  
Jin Chao Zhang ◽  
Xu Dong Sun
Keyword(s):  
Photoelectron Spectroscopy ◽  
Sol Gel ◽  
Contact Angle Measurement ◽  
Angle Measurement ◽  
Sem Images ◽  
Simple Method ◽  
Gel Method ◽  
Sol Gel Method ◽  
Atomic Force ◽  
Infrared Spectral

Here a simple method was developed to fabricate hydrophilic Polyethersulphone film via a sol-gel process. The correspondent hydrophilicity was evaluated by infrared spectral analysis, X-ray photoelectron spectroscopy, the contact angle measurement, atomic force microscope and scanning electron microscope analysis, respectively. Both FTIR and XPS analysis indicated that the film surfaces have a relatively dense sol layer, which favors to become hydrophilic. AFM analysis demonstrated that the higher hydrophilicity was mainly attributed to the surface roughness, while SEM images show that the micro/nanometer crater-like protrusions appears on the film surfaces, whereas the spongy structures & the finger-like structures appear in cortex and intermediate layer respectively. This leads to the hydrophilic film forming after film being treated by sol-gel method.

Characterization of LiMn0.3Co0.3Ni0.3Cr0.1O2 and LiMn0.333Co0.333Ni0.333O2 Synthesized via Sol-Gel Method: XRD, SEM and XPS Studies

2012 ◽  
Vol 545 ◽  
pp. 148-152
Author(s):  
Jaafar Mohd Hilmi ◽  
Rusdi Roshidah ◽  
Mohamed Nor Sabirin ◽  
Rosiyah Yahya ◽  
Norlida Kamarulzaman
Keyword(s):  
Layered Structure ◽  
Photoelectron Spectroscopy ◽  
Sol Gel ◽  
High Energy ◽  
Binding Energies ◽  
High Energy Density ◽  
Sem Images ◽  
Gel Method ◽  
X Ray ◽  
Sol Gel Method

One of the aspects most intensively researched in the continuing improvisation of lithium battery is the search for high capacity, high energy density and high performance cathode materials. Substitution of the electroactive elements with heteroatoms is one of the promising methods. In this study, a potential cathode material with a layered structure was successfully synthesized via a sol-gel method. As a comparison, the well-known LiMn1/3Co1/3Ni1/3O2(LiMn0.333Co0.333Ni0.333O2) was also synthesized using exactly the same method and conditions. Both materials were characterized using simultaneous thermogravimetric analysis (STA), X-ray powder diffraction (XRD), field-emission scanning electron microscopy (FESEM) and X-ray photoelectron spectroscopy (XPS). The stoichiometries of the compounds were also confirmed through energy-dispersive X-ray spectroscopy (EDX) measurement. XRD results show that both compounds are single phase and impurity-free with well-ordered hexagonal layered structure characteristics of R-3m space group. Both compounds also show similar morphologies with well-formed crystals and clean surfaces as depicted by the SEM images. XPS measurement reveals that the introduction of chromium into LiMn1/3Co1/3Ni1/3O2results in a considerable change in the chemical environment as observed by significant changes in the binding energies (BE) of manganese, cobalt and nickel respectively.

Fabrication of Super-Hydrophobic Membrane with Hydrophilic Polyethersulphone

2011 ◽  
Vol 396-398 ◽  
pp. 361-366
Author(s):  
Guang Fen Li ◽  
Xu Dong Sun ◽  
Yu Zhong Zhang
Keyword(s):  
Contact Angle ◽  
Sol Gel ◽  
Contact Angle Measurement ◽  
Angle Measurement ◽  
Hydrophobic Membrane ◽  
Sem Images ◽  
Simple Method ◽  
Membrane Surfaces ◽  
Sol Gel Process ◽  
Experimental Parameters

Here a simple method was developed to fabricate super-hydrophobic membrane with hydrophilic Polyethersulphone (PES) via a sol-gel process. The influences of experimental parameters i.e. the precursor treated time, the baking temperature of the membrane, and the fluorinated time on the hydrophobicity of the membranes were extensively investigated. The correspondent hydrophobicity was crosschecked by the contact angle measurement. For the optimum condition, the contact angle of the resulted super-hydrophobic membrane can be increased to 156°. The FTIR analysis confirmed that the membrane surfaces were covered by hydrophobic functional groups, which resulted in both higher surface roughness and higher heterogeneity, and therefore higher hydrophobicity. The micro/nano-meter crater-like protrusions on the membrane surfaces were observed from the images obtained from both AFM and SEM measurements. Moreover, the spongy holes and the finger-like holes were observed in cortex and intermediate layer respectively, from the cross-section of the SEM images.

scholarly journals Synthesis, characterization and in vitro cytotoxicity study of Co and Ni ferrite nanoparticles prepared by sol-gel method

2021 ◽  
Vol 3 (7) ◽  
Author(s):  
Alexandre Pancotti ◽  
Dener Pereira Santos ◽  
Dielly Oliveira Morais ◽  
Mauro Vinícius de Barros Souza ◽  
Débora R. Lima ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Sol Gel ◽  
Test Sample ◽  
In Vitro Cytotoxicity ◽  
Gel Method ◽  
X Ray ◽  
Sol Gel Method ◽  
Transmission Electron ◽  
Crystallite Sizes

AbstractIn this study, we report the synthesis and characterization of NiFe2O4 and CoFe2O4 nanoparticles (NPs) which are widely used in the biomedical area. There is still limited knowledge how the properties of these materials are influenced by different chemical routes. In this work, we investigated the effect of heat treatment over cytotoxicity of cobalt and niquel ferrites NPs synthesized by sol-gel method. Then the samples were studied using transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), vibrating sample magnetometer (VSM), Fourier Transform Infrared Spectroscopy Analysis (FTIR), and X-ray fluorescence (XRF). The average crystallite sizes of the particles were found to be in the range of 20–35 nm. The hemocompatibility (erythrocytes and leukocytes) was checked. Cytotoxicity results were similar to those of the control test sample, therefore suggesting hemocompatibility of the tested materials.

Magnetic Properties of Bulk Zn0.95-XMnXFe0.05O2 Prepared by Sol-Gel Method and Subsequent Hot Pressing

2011 ◽  
Vol 268-270 ◽  
pp. 356-359 ◽  
Author(s):  
Wen Song Lin ◽  
C. H. Wen ◽  
Liang He
Keyword(s):  
Magnetic Properties ◽  
Photoelectron Spectroscopy ◽  
Raw Materials ◽  
Sol Gel ◽  
Secondary Phase ◽  
X Ray Diffraction ◽  
Gel Method ◽  
X Ray ◽  
Sol Gel Method ◽  
Doped Zno

Mn, Fe doped ZnO powders (Zn0.95-xMnxFe0.05O2, x≤0.05) were synthesized by an ameliorated sol-gel method, using Zn(CH3COO)2, Mn(CH3COO)2and FeCl2as the raw materials, with the addition of vitamin C as a kind of chemical reducer. The resulting powder was subsequently compacted under pressure of 10 MPa at the temperature of 873K in vacuum. The crystal structure and magnetic properties of Zn0.95-xMnxFe0.05O2powder and bulk samples have been investigated by X-ray diffraction (XRD) and vibrating sample magnetometer (VSM). X-ray photoelectron spectroscopy (XPS) was used to study chemical valence of manganese, iron and zinc in the samples. The x-ray diffraction (XRD) results showed that Zn0.95-xMnxFe0.05O (x≤0.05) samples were single phase with the ZnO-like wurtzite structure. No secondary phase was found in the XRD spectrum. X-ray photoelectron spectroscopy (XPS) showed that Fe and Mn existed in Zn0.95-xMnxFe0.05O2samples in Fe2+and Mn2+states. The results of VSM experiment proved the room temperature ferromagnetic properties (RTFP) of Mn, Fe co-doped ZnO samples.

scholarly journals Growth and Characterization of CuO Nanostructures on Si for the Fabrication of CuO/p-Si Schottky Diodes

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
S. Çetinkaya ◽  
H. A. Çetinkara ◽  
F. Bayansal ◽  
S. Kahraman
Keyword(s):  
Schottky Diodes ◽  
Sol Gel ◽  
Sem Images ◽  
Gel Method ◽  
Sol Gel Method ◽  
Current Voltage ◽  
Current Voltage Characteristics ◽  
Cbd Method ◽  
Xrd Techniques

CuO interlayers in the CuO/p-Si Schottky diodes were fabricated by using CBD and sol-gel methods. Deposited CuO layers were characterized by SEM and XRD techniques. From the SEM images, it was seen that the film grown by CBD method is denser than the film grown by sol-gel method. This result is compatible with XRD results which show that the crystallization in CBD method is higher than it is in sol-gel method. For the electrical investigations, current-voltage characteristics of the diodes have been studied at room temperature. ConventionalI-Vand Norde’s methods were used in order to determine the ideality factor, barrier height, and series resistance values. It was seen that the morphological and structural analysis are compatible with the results of electrical investigations.

Effect of Cobalt Content on the Structural Properties of Zirconia Prepared by Sol-Gel Method

2020 ◽  
Vol 1000 ◽  
pp. 227-232
Author(s):  
Nurhayati Indah Ciptasari ◽  
Adri Nora ◽  
Lutviasari Nuraini ◽  
Lusiana ◽  
Nono Darsono ◽  
...  
Keyword(s):  
Structural Properties ◽  
Sol Gel ◽  
Cobalt Content ◽  
Secondary Phase ◽  
Xrd Analysis ◽  
Weight Percent ◽  
Sem Images ◽  
Monoclinic Crystal ◽  
Gel Method ◽  
Sol Gel Method

Zirconia (ZrO2) powders doped with cobalt were prepared by sol-gel method using inorganic salt of zirconium (IV) chloride (ZrCl4) as precursor. The amount of cobalt was varied in the range of 4–16% weight percent to study the effect to structural properties. X-ray diffraction (XRD) analysis suggested the resulting phases were zirconium oxide (Baddeleyite) with monoclinic crystal system along with cobalt oxide as secondary phase. The increasing cobalt content caused the XRD peaks to shift into lower angle due to substitution of Zr atom to smaller Co atom in crystal lattice. Scanning electron microscope (SEM) images showed the samples with higher Co content had smoother surface. Generally, the microstructures of Co doped zirconia powders consisted of large agglomerates with small particles on the surface.

scholarly journals Photocatalytic degradation of methylene blue under natural sunlight using iron titanate nanoparticles prepared by a modified sol–gel method

2020 ◽  
Vol 7 (9) ◽  
pp. 200708
Author(s):  
Z. Z. Vasiljevic ◽  
M. P. Dojcinovic ◽  
J. D. Vujancevic ◽  
I. Jankovic-Castvan ◽  
M. Ognjanovic ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Degradation ◽  
Sol Gel ◽  
Oh Radicals ◽  
Simple Method ◽  
Gel Method ◽  
Natural Sunlight ◽  
Sol Gel Method ◽  
Light Region ◽  
Iron Titanate

The aim of this work was to synthesize semiconducting oxide nanoparticles using a simple method with low production cost to be applied in natural sunlight for photocatalytic degradation of pollutants in waste water. Iron titanate (Fe 2 TiO 5 ) nanoparticles with an orthorhombic structure were successfully synthesized using a modified sol–gel method and calcination at 750°C. The as-prepared Fe 2 TiO 5 nanoparticles exhibited a moderate specific surface area. The mesoporous Fe 2 TiO 5 nanoparticles possessed strong absorption in the visible-light region and the band gap was estimated to be around 2.16 eV. The photocatalytic activity was evaluated by the degradation of methylene blue under natural sunlight. The effect of parameters such as the amount of catalyst, initial concentration of the dye and pH of the dye solution on the removal efficiency of methylene blue was investigated. Fe 2 TiO 5 showed high degradation efficiency in a strong alkaline medium that can be the result of the facilitated formation of OH radicals due to an increased concentration of hydroxyl ions.

Solar Reflection Characteristics of Phthalocyanine Green/TiO2 Composite Green Pigments Prepared via Different Approaches

2016 ◽  
Vol 849 ◽  
pp. 725-731 ◽  
Author(s):  
Xiao Juan Feng ◽  
Qian Jin Mao ◽  
Qiu Rui Lv ◽  
Zi Ming Wang ◽  
Su Ping Cui
Keyword(s):  
Near Infrared ◽  
Sol Gel ◽  
Coating Materials ◽  
Gel Method ◽  
Sol Gel Method ◽  
Reflective Coating ◽  
Study Results ◽  
Infrared Spectral ◽  
Physical Mixing ◽  
Green Pigments

Near-infrared pigment is the key to control the near-infrared performance of solar heat-reflective coating which has good economic and application prospects as a new special coating. Green infrared reflective pigments were prepared through physical mixing, inorganic lake method and sol-gel processes in this study. Results show that the near-infrared spectral reflectance of composite pigments is improved when using inorganic lake method and sol-gel method. Chromaticity of composite pigment is the closest to phthalocyanine green when using sol-gel method. Physically mixing method is not suitable to prepare infrared reflective pigment. The coating materials have influence on the coating effect and the reflectivity of near-infrared spectral range in a certain extent.

CHARACTERISTIC ANALYSIS ON GaN NANOCRYSTALLINE POWDER PREPARED BY SOL–GEL METHOD

2007 ◽  
Vol 14 (06) ◽  
pp. 1181-1185 ◽  
Author(s):  
ENLING LI ◽  
XUEWEN WANG ◽  
SHANSHAN WANG ◽  
GUICAN CHEN
Keyword(s):  
Photoelectron Spectroscopy ◽  
Sol Gel ◽  
Nanocrystalline Powder ◽  
Band Edge Emission ◽  
Characteristic Analysis ◽  
Gel Method ◽  
X Ray ◽  
Sol Gel Method ◽  
Luminescence Peak ◽  
Strong Luminescence

Gallium nitride ( GaN ) nanocrystalline powder has been prepared by sol–gel method. The GaN powder has been confirmed as single-crystalline GaN with wurtzite structure by X-ray diffraction (XRD) and selected-area electron diffraction (SAED), and the diameter of the grains of GaN powder changes from 30 to 100 nm under transmission electron microscopy (TEM). Having been excited by 240 nm light at room temperature, GaN powder has a strong luminescence peak located at 395 nm and a weak luminescence peak located at 295 nm, attributed to GaN band-edge emission and blue-shift of the band-gap emission. Moreover, X-ray photoelectron spectroscopy (XPS) confirms the formation of the bond between Ga and N , and Raman scattering spectrum confirms A1 (TO) and E1 (TO) vibrational modes of GaN .

DIFFERENT MORPHOLOGIES OFTiO2NANOSTRUCTURES IN ACIDIC AND BASIC SOL–GEL METHOD

NANO ◽  
2010 ◽  
Vol 05 (05) ◽  
pp. 279-285 ◽  
Author(s):  
M. H. IMANIEH ◽  
Y. VAHIDSHAD ◽  
P. NOURPOUR ◽  
S. SHAKESI ◽  
K. SHABANI
Keyword(s):  
Ph Value ◽  
Sol Gel ◽  
Simple Method ◽  
Gel Method ◽  
Sol Gel Method ◽  
New Process ◽  
Nanocrystalline Titanium ◽  
Acidic Conditions ◽  
Nanocrystalline Titanium Dioxide ◽  
First Time

In this research, nanocrystalline titanium dioxide (TiO2) particles were prepared by a modified alkoxide technique under basic and acidic conditions at room temperatures. A simple method for preparing different morphology of TiO2has been developed. The reaction condition was used to control the crystalline size, phase and morphology of the TiO2nanostructures. In this process by adjusting the Rw(water to precursor ratio) and pH value the hydrolysis and condensation reactions were controlled. This led to the development of a new process to produce TiO2nanorod (for the first time by sol–gel method) at high pH value (basic) while the water content was sufficient whereas at low pH value (acidic) nanosphere TiO2were obtained. The powders were characterized by DTA, XRD, FE-SEM and UV–vis techniques and their physical properties were compared.

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