Preparation and characterization of iron(III) 99Mo-molybdate(VI) gels for the assessment of 99mTc elution performance

2018 ◽  
Vol 106 (1) ◽  
pp. 47-57 ◽  
Author(s):  
Mahmoud Amin ◽  
Tharwat W. Fasih ◽  
Mohamed A. El-Absy
Keyword(s):  
Room Temperature ◽  
Saline Solution ◽  
Mixed Solution ◽  
Filtration Method ◽  
Chromatographic Columns ◽  
Water Of Hydration ◽  
Ambient Room Temperature ◽  
Ft Ir ◽  
Mo Content

AbstractNew iron(III)99Mo-molybdate(VI) gels (Fe99Mo) of high Mo content were prepared by the precipitation/filtration method.99Mo–MoO3dissolved in NaOH was added to aqueous solutions of Fe(NO3)3at Mo/Fe mole fractions ~2.21 and 1.99 with continuous stirring at ambient room temperature. Two different Fe99Mo were precipitated from the mixed solutions adjusted at pH 2 and 4.7. The amount of water of hydration increased with the increasing the gel settling time and pH of the mixed solution. The matrices were characterized by radiometric, XRD, SEM, XRF, FT-IR, TGA, and DTA measurements. Small chromatographic columns of 2.0 g Fe99Mo containing ≥800 mg Mo tagged with 740 MBq99Mo were eluted with 5 mL saline solution. Highly reproducible99mTc elution indices suitable for preparation of99Mo/99mTc generators were achieved from generator supported with 0.5 g Al2O3filter. Elution performance of99mTc radionuclide was highly dependent on the gel structural properties.

Synthesis and Characterization of Novel Fluorene-Based Poly(Imino Ketone)s

2011 ◽  
Vol 335-336 ◽  
pp. 1086-1089
Author(s):  
Lin Zhang ◽  
Guan Jun Chang ◽  
Lu Bin Miao ◽  
Run Xiong Lin
Keyword(s):  
Optical Properties ◽  
Room Temperature ◽  
Main Chain ◽  
High Glass Transition Temperature ◽  
Good Solubility ◽  
Ether Ether Ketone ◽  
Poly Ether Ether Ketone ◽  
Ft Ir ◽  
Ether Ketone

Fluorene-based poly(imino ketone)s (PIKF) were designed and synthesized by reacting 1,4-Bis-(4-bromobenzoyl)-benzene and 9,9-bis(3-R-4-aminophenyl)fluorine (R: H, CH3 or F). The structures of the resulting polymers were characterized by FT-IR, 1H NMR spectroscopy and elemental analysis. The thermo and optical properties of PIKF were evaluated. Good solubility of PIKF in ordinary organic solvents such as THF and chloroform was confirmed. PIKF were amorphous at room temperature. No phase transition except for Tg was confirmed in the DSC analysis. PIKF displayed a high glass transition temperature (Tg > 215 °C) in comparison with commercially available poly(ether ether ketone) (PEEK Tg = 169 °C). The UV-vis absorption spectrum of polymers exhibited two absorption peaks around 271 nm and 369 nm; The fluorescence spectrum of the PIKF-1, 2 and PIKF-3 showed a maximum emission wavelength at 502 nm and 491 nm, respectively. These optical properties were probably related to the cardo structure of the fluorene moiety placed on the main chain.

scholarly journals Fabrication and Characterization of Polyvinyl Chloride/Copolyester/Nanoclay Composite Nanofiber

2021 ◽  
Vol 33 (8) ◽  
pp. 1868-1874
Author(s):  
S. Jasmine ◽  
D. Reuben Jonathan ◽  
J. Sidharthan ◽  
D. Roopsingh
Keyword(s):  
Polyvinyl Chloride ◽  
Room Temperature ◽  
Composite Nanofibers ◽  
Schmidt Reaction ◽  
Electrospinning Method ◽  
Composite Nanofiber ◽  
Nmr Techniques ◽  
Ft Ir ◽  
Acid Catalyzed

Four random copolyesters were prepared by the polycondensation reaction of diols namely 1,5-dihydroxyanthraquinone, 4,4′-oxybis(benzoic acid) and variable chalcone diol. Four chalcone diols were produced by acid catalyzed Claisen-Schmidt reaction at room temperature. These random copolyesters were elucidated by solubility tests and viscosity measurements. The FT-IR, 1H & 13C NMR techniques were applied to establish the repeating units present in the copolyester backbone. Electrospinning method was employed to derive polyvinyl chloride-copolyester-nanoclay composite nanofiber from tetrahydrofuran medium. Scanning electron microscopy (SEM) was utilized to examine the morphology of the nanofibers. These composite nanofibers are expected to be a potential biomaterial of greater significance.

scholarly journals Characterization of Copper Phthalocyanine-Tetrasulfonic Acid Tetrasodium Salt /Graphene Oxide

2021 ◽  
pp. 1893-1900
Author(s):  
Mayada Waheed Kazem ◽  
Raed Kamel Jalal
Keyword(s):  
Graphene Oxide ◽  
Room Temperature ◽  
Annealing Temperature ◽  
Copper Phthalocyanine ◽  
Chemical Compounds ◽  
Ir Absorption ◽  
Mixing Ratios ◽  
Coating Method ◽  
Ft Ir

In this paper, the pure graphene oxide and copper phthalocyanine-tetrasolfonic acid tetrasodium salt were used to prepare thin films by using the spin coating method. These chemical compounds have remarkable optical properties and are chemically used in the development of device sensors by increasing the mixing ratio. Three different mixing ratios were prepared at room temperature and 150oC annealing temperature for three hours. The spectra of UV-VIS-IR absorption, photoluminescence, and Fourier-transformed infrared (FT-IR) were studied.

Synthesis and Characterization of Reduced Graphene Oxide Film as Electronic Material

2011 ◽  
Vol 287-290 ◽  
pp. 2356-2359
Author(s):  
Juan Yang ◽  
Chuan Liang Zang ◽  
Lei Sun ◽  
Nan Zhao ◽  
Ya Zhou Zhou
Keyword(s):  
Graphene Oxide ◽  
Raw Materials ◽  
Large Area ◽  
Filtration Method ◽  
Vacuum Filtration ◽  
Structure And Morphology ◽  
Reduced Graphene ◽  
Thermal Annealing Process ◽  
Ft Ir

Large area graphene oxide (GO) film was prepared by vacuum filtration method through a membrane with a pore size of 25 nm, using GO sheets suspension as raw materials. The film was thermal treated in Ar/H2 atmosphere at 600°C to make the film electrical conductive. The structure and morphology of the obtained film were investigated by XRD, Raman, FT-IR and SEM. Results showed that most oxygen-containing functional groups in GO film were reduced during the thermal annealing process. The obtained reduced film showed excellent electrical conductivity and the average sheet resistance of the reduced film was 11.3 Ω□-1.

Preparation and Characterization of Highly Monodisperse Vinyl Functionalized Silica Spheres by Sol-Gel Method

2012 ◽  
Vol 560-561 ◽  
pp. 8-12 ◽  
Author(s):  
Zhong Ming Zhang ◽  
Lian Xi Chen ◽  
Jie Li ◽  
Cai Bin Jiao
Keyword(s):  
Sol Gel ◽  
Ammonia Concentration ◽  
Silica Spheres ◽  
Mixed Solution ◽  
Functionalized Silica ◽  
Uniform Size ◽  
Hybrid Silica ◽  
Ft Ir ◽  
Scanning Electron

Highly monodisperse and uniform-size vinyl functiona-lized silica spheres were synthesized directly from vinyltriethoxysilane (VTES) in water/ethanol mixed solution, and in this system, we successfully controlled the size and shape of hybrid silica spheres by adjusting the concentrations of the precursor VTES and catalyst ammonia. On the basis of the experiment results, it was found that hybrid spheres size significantly increased as the increment of concentration of VTES. However, increasing ammonia concentration resulted in decreasing of diameter of hybrid silica spheres from 542 to 272 nm. The morphologies and structure were determined by Field Emission Scanning Electron Microscopy (FE-SEM) and Fourier transformed infrared (FT-IR).

scholarly journals Characterization of bio-Oil produced by Microwave Pyrolysis of Karanja Seed.

2019 ◽  
Vol 9 (2) ◽  
pp. 4271-4275
Keyword(s):  
Room Temperature ◽  
Microwave Pyrolysis ◽  
Aliphatic Compounds ◽  
Noncondensable Gases ◽  
Fire Point ◽  
Bio Oil ◽  
Power Inputs ◽  
Ft Ir ◽  
Pyrolysis Experiment

Pyrolysis is one technique that produces three products in a short span of time in which both conventional and non-conventional method of heating (microwave irradiation) can be done. Karanja seed powder is taken as the feedstock in this microwave pyrolysis experiment. Proximate and Elemental analysis of karanja seed powder resulting volatile content of about 84.89% and moisture content of 10.11% whereas the Carbon of 52.08%, Hydrogen of 8.26%, Sulphur of 0.21%, Nitrogen of 4.02% and oxygen of 35.04%. Microwave pyrolysis for karanja seed was conducted for two power inputs of 700W and 800W in which bio-oil yield is high of 47% at 700W and noncondensable gases of 39% at 800W. The FT-IR results resembles the presence of aliphatic compounds. The TGA analysis was also taken for the produced bio-oil. The rheological study was made to determine the dynamic viscosity of the produced bio-oil at 50 rpm in room temperature which is averaged to 52 cP. The flash point of 90°C and fire point of 94°C was also determined for the produced bio-oil

scholarly journals Synthesis of iron sand into nano Mn-Ferrite

2014 ◽  
Vol 9 (4) ◽  
Author(s):  
Agus Yulianto ◽  
Sulhadi Sulhadi ◽  
Ahmad Lutfi Isnaeni Azis ◽  
Eli Dayati
Keyword(s):  
Room Temperature ◽  
Heating Temperature ◽  
Sol Gel ◽  
Precipitation Process ◽  
Average Particle ◽  
Mixed Solution ◽  
Nanosized Powder ◽  
Heating Treatment ◽  
Impurity Elements

Magnetic material, Mn-Ferrite, was prepared from iron sand using precipitation and sol-gel methods. The methods were applied to produce a homogenous and nanosized powder. The precipitation process was taken place at room temperature. MnO2 and Fe3O4 were dissolved with HCl solution to obtained MnCl2, FeCl2 and FeCl3 and the resulted solution were mixed. NH4OH and NaOH solutions were added into mixed solution to produce precipitated material. At the heating temperature of 70°C, 59% of (Mn,Fe)2O3 was obtained with its particle size around 1-10 nm. By applying sol-gel method, the iron sand was processed into iron (III) nitrate using nitric acid. Then Iron (III) nitrate was mixed with manganese (II) nitrate in the EG solvent and heated for 2 hours in 100°C until gel was formed. To get the powder, the gel was dried at 150°C for 2 hours and then continued into 350 -700°C for 2 hours. The XRD characterization shows that the powder produced from 350°C heating contain 100% of (Mn,Fe)3O4 with spinel cubic structure. At the heating treatment of 700°C, the compound was changed into (Mn,Fe)2O3 and MnFeO3. By applying Scherrer method, it was known that the average particle sizewas 1 nm and homogenous. The XRF characterization of the material resulted by both of the methods indicates that there were impurity elements such as Ti, Mo, Zn, Ca, Cu and Ni exist in the sample, since the study was used row material of iron sand.

SYNTHESIS AND CHARACTERIZATION OF A RODLIKE LIQUID CRYSTALLINE POLYURETHANE OLIGOMER

2010 ◽  
Vol 03 (03) ◽  
pp. 169-172
Author(s):  
CHUN WEI ◽  
QIU-SHAN GAO ◽  
YONG-YANG GONG ◽  
XUE-MEI XIONG ◽  
XIN SHEN
Keyword(s):  
Weight Loss ◽  
Liquid Crystalline ◽  
Room Temperature ◽  
Decomposition Temperature ◽  
Synthesis And Characterization ◽  
Smectic A ◽  
Smectic A Phase ◽  
Ft Ir ◽  
Dimethylformamide Solution

A novel rodlike liquid crystalline polyurethane (LCPU) oligomer was synthesized by polyaddition of hexane-1,6-diylbis(4-hydroxybenzoate) with toluene 2,4-diissocyanate in N, N′-dimethylformamide solution. The properties of the LCPU oligomer were investigated by FT-IR, DSC, TGA, POM, WAXD and SEM. The LCPU oligomer was a yellow powder at room temperature, which maintained a stable rodlike microstructure below its melting point, and had high crystallinity. The LCPU oligomer exhibited thermotropic liquid crystalline properties between 166–183°C, and the smectic-A phase with focal conic fan textures at the liquid crystal state was observed by POM. The decomposition temperature of the LCPU oligomer at 5% weight loss was 282°C.

Characterization of Chitin Extracted from Waste Sources via XRD, FTIR, and TGA Techniques

2012 ◽  
Vol 488-489 ◽  
pp. 1404-1408 ◽  
Author(s):  
Suraida Basosidik ◽  
Piyapong Pankaew ◽  
Ekachai Hoonnivathana ◽  
Pichet Limsuwan ◽  
Kittisakchai Naemchanthara
Keyword(s):  
Particle Size ◽  
Room Temperature ◽  
Raw Materials ◽  
Crab Shell ◽  
Shrimp Shell ◽  
Naoh Solution ◽  
Ft Ir

This work presents the chitin preparation from waste sources, the chitin powders were successfully extracted from shrimp shell, crab shell and squid pen. To prepare chitin powders, all raw materials were washed and grounded using agate mortar, which the particle size of powder is 212–250 μm. Then, the powdered materials were immersed into solution of chloroform and methanol (with 2:1 ratio) at room temperature for removing fat. The deprotienation and decarbonation, the samples were immersed in 50 wt% of NaOH solution for 24 h and in 4 wt% of HCl for 1 h, respectively. The XRD, FT-IR and TGA techniques were used to indicate the different characteristic between α-chitin and β-chitin prepare.

Synthesis and characterization of polypyrrole/molybdenum oxide composite for ammonia vapour sensing at room temperature

2021 ◽  
pp. 096739112110365
Author(s):  
Mohd Urooj Shariq ◽  
Ahmad Husain ◽  
Mahfoozurrahman Khan ◽  
Anees Ahmad
Keyword(s):  
Electron Microscopy ◽  
Molybdenum Oxide ◽  
Room Temperature ◽  
X Ray Diffraction ◽  
X Ray ◽  
Oxide Composite ◽  
Ammonia Vapour ◽  
Ft Ir ◽  
Adsorption Desorption

In this study, polypyrrole (PPy) and polypyrrole/molybdenum oxide composite (PPy/MoO3) were synthesized by the chemical oxidative method in an aqueous medium, using anhydrous ferric chloride (FeCl3) as an oxidant. The successful preparation of materials was confirmed by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmittance electron microscopy (TEM). PPy and PPy/MoO3 were converted into pellets which were used as the sensor. A four-in-line probe device was used for studying DC electrical conductivity–based ammonia vapour–sensing properties at three different ammonia concentrations, that is, 1 M, 0.5 M and 0.1 M. The PPy/MoO3 sensor showed much-improved sensing performance than the PPy sensor in terms of % sensing response and reversibility. PPy/MoO3 sensor showed excellent selectivity for ammonia vapours against various VOCs. The % sensing response of PPy/MoO3 sensor towards ammonia was found to be 2.19, 2.50, 3.16, 3.87, 4.1, 5.15, 6.19, 6.55 and 7.77 times greater than ethanol, methanol, acetone, acetaldehyde, formaldehyde, toluene, benzene, chloroform and n-hexane, respectively. In the end, a sensing mechanism was also proposed, which is based on rapid adsorption–desorption of ammonia molecules on the PPy/MoO3 sensor’s surface.

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