Study on Modified Rapeseed Oil/Montmorillonite Nanocomposites

2010 ◽  
Vol 123-125 ◽  
pp. 1291-1294 ◽  
Author(s):  
Bin Lü ◽  
Jian Zhong Ma ◽  
Dang Ge Gao ◽  
Lei Hong
Keyword(s):  
Rapeseed Oil ◽  
Fourier Transforms ◽  
Raw Materials ◽  
Infrared Spectrometry ◽  
Emulsifying Properties ◽  
X Ray Diffraction ◽  
Layer Spacing ◽  
Transmission Electron ◽  
Ft Ir ◽  
Better Than

Modified rapeseed oil(MRO) was prepared by using rapeseed oil, ethylene diamine and acrylic acid as the raw materials. Modified rapeseed oil/montmorillonite(MRO/MMT) nanocomposite was prepared by using modified rapeseed oil and montmorillonite. The emulsifying properties of MRO and MRO/MMT were determined respectively. Fourier transforms infrared spectrometry (FT-IR) and Transmission Electron microscope (TEM) results showed that MRO/MMT was prepared successfully. X-ray diffraction (XRD) results showed that modified rapeseed oil could smoothly enter the interlayer of montmorillonite, and modified the montmorillonite; with an increase in the amount of montmorillonite, the layer spacing of montmorillonite in the MRO/MMT lower after the first increase. The results of emulsifying properties indicated that emulsifying properties of MRO/MMT was better than MRO.

Preparation and Characterization of NiO Nanoparticles through Thermal Decomposition of Bis(glycinato)Nickel(II)dihydrate

2012 ◽  
Vol 601 ◽  
pp. 21-25
Author(s):  
Wei Yi Dan ◽  
Jian Fen Li ◽  
Xiang Chen Tu ◽  
Kui Le Jia
Keyword(s):  
Reaction Time ◽  
Fourier Transforms ◽  
Infrared Spectrometry ◽  
Nio Nanoparticles ◽  
X Ray Diffraction ◽  
Fine Crystal ◽  
Transmission Electron ◽  
Mean Size ◽  
Ft Ir

NiO nanoparticles were successfully prepared by decomposing the predecessor bis(glycinato)nickel(II)dihydrate in the presence of oleylamine and triphenylphosphine (TPP), and different approaches including Fourier transforms infrared spectrometry(FT-IR), X-ray diffraction(XRD) and transmission electron microscopy (TEM) were used to characterize the NiO nanoparticles. Meanwhile, the effects of TPP concentration and reaction time on the size and yield of NiO nanoparticles derived from precursors were thoroughly investigated in this paper. The analysis results indicated that the prepared NiO nanoparticles were found spherical in shape and demonstrated weak agglomeration. They had generally high purity and a fine crystal phase of cubic syngony. Furthermore, the effects of the TPP concentration and reaction time on the size and yield of NiO nanoparticles are very crucial, higher concentration of TPP would results in reduction of both the mean size and yield of NiO particles. However both yields and particles size of NiO nanoparticles continuously increased as increasing reaction time, after more than 60 minutes, the size and yield of NiO nanoparticles kept hardly change.

FACILE SYNTHESIS OF HYDROXYLAPATITE NANOSTRUCTURES WITH VARIOUS MORPHOLOGIES

NANO ◽  
2009 ◽  
Vol 04 (03) ◽  
pp. 165-170 ◽  
Author(s):  
XIAO-JUN HU ◽  
JIN-KU LIU ◽  
XIAO-YAN QIN ◽  
JIA HUANG ◽  
YI YI
Keyword(s):  
Crystal Engineering ◽  
Fourier Transforms ◽  
X Ray Diffraction ◽  
X Ray ◽  
Solution Approach ◽  
Engineering Research ◽  
Practical Applications ◽  
Transmission Electron ◽  
Ft Ir ◽  
Fourier Transforms Infrared Spectroscopy

The hydroxylapatite nanostructures with different morphologies have been synthesized by a facile solution approach. The samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) technologies, and Fourier transforms infrared spectroscopy (FT-IR). The control mechanism of the hydroxylapatite with various morphologies nanostructures was investigated. Some practical experimental conclusions could be obtained, which were expected to have potential values in crystal engineering research and practical applications.

scholarly journals Solvothermal Synthesis ofGd2O3 : Eu3+Luminescent Nanowires

2010 ◽  
Vol 2010 ◽  
pp. 1-5 ◽  
Author(s):  
Guixia Liu ◽  
Song Zhang ◽  
Xiangting Dong ◽  
Jinxian Wang
Keyword(s):  
Large Scale ◽  
Hexagonal Phase ◽  
Infrared Spectrometry ◽  
Cubic Phase ◽  
X Ray Diffraction ◽  
Display Devices ◽  
Transmission Electron ◽  
Xrd Patterns ◽  
Facile Solvothermal Method ◽  
Better Than

UniformGd2O3 : Eu3+luminescent nanowires were prepared on a large scale by a facile solvothermal method using polyethylene glycol (PEG-2000) as template and ethanol as solvent; the properties and the structure were characterized. X-ray diffraction (XRD) patterns and Fourier transform infrared spectrometry (FTIR) showed that the precursors are hexagonal phaseGd(OH)3crystals, and the samples calcined at 800C°are cubic phaseGd2O3. Transmission Electron Microscopy (TEM) images indicated that the samples are nanowires with a diameter of 30 nm and a length of a few microns. Photoluminescence (PL) spectra showed that the ratio ofD50→F72toD50→F71transition peak of the calcined samples is stronger than that of the precursors, which confirmed that the color purity of theGd2O3 : Eu3+is better than that of the precursors. The as-obtainedGd2O3 : Eu3+luminescent nanowires show a strong red emission corresponding toD50→F72transition (610 nm) ofEu3+under ultraviolet excitation (250 nm), which have potential application in red-emitting phosphors and field emission display devices.

scholarly journals Synthesis and characterization of Fe3O4@SiO2 sub-nano core/shell with SiO2 derived from rice husk ash

2020 ◽  
pp. 52-56
Author(s):  
Luong Huynh Vu Thanh, Tran Nguyen Phuong Lan Luong
Keyword(s):  
Spherical Shape ◽  
Xrd Analysis ◽  
Research Process ◽  
Infrared Spectrometry ◽  
Core Shell ◽  
X Ray Diffraction ◽  
Tem Analysis ◽  
Transmission Electron ◽  
Vis Spectroscopy ◽  
Ft Ir

This study aims to synthesize and characterize Fe3O4@SiO2 sub-nanoparticles (SNPs) with high saturation magnetization (SM). The research process was conducted in simple and environmentally friendly conditions. The results of ultraviolet-visible (UV-Vis) spectroscopy and X-ray diffraction (XRD) analysis presented that the Fe3O4@SiO2 SNPs were well formed and the phase change of Fe3O4 NPs did not happen in Fe3O4@SiO2 SNPs. Transmission electron microscope (TEM) analysis showed that the Fe3O4@SiO2 SNPs are in a fairly spherical shape with a core/shell structure and a diameter in a range of 100 nm to 500 nm. Fourier transform infrared spectrometry (FT-IR) spectra of Fe3O4@SiO2 SNPs presented some absorption peaks indicating the existence of Si-O-Si, O-Si-O, Fe-O and Fe-O-Si. The SM of Fe3O4 particles and Fe3O4@SiO2 SNPs determined via vibrating sample magnetometer (VSM) were 50.9 emu.g−1 and 19.5 emu.g−1, respectively. All the above results provide clear evidence that the Fe3O4 particles were coated by SiO2 to form sub-nano core/shell with great SM.

Synthesis and Characterization of GO-Chit-Ni Nanocomposite as a Recoverable Nanocatalyst for Reducing Nitroarenes in Water

2020 ◽  
Vol 17 (7) ◽  
pp. 523-531
Author(s):  
Mosayeb Sarvestani ◽  
Roya Azadi
Keyword(s):  
Fourier Transforms ◽  
Considerable Change ◽  
Environmentally Benign ◽  
X Ray Diffraction ◽  
Simple Method ◽  
Transmission Electron ◽  
Ir Transmission ◽  
Aryl Amines ◽  
Ft Ir

In the present study, nickel nanoparticles (Ni-NPs) immobilized on graphene oxide-chitosan (GO-Chit-Ni) have been synthesized and characterized as a catalyst for reduction of nitroarenes in water. For this purpose, GO has been functionalized with chitosan (GO-Chit). Then, Ni-NPs were immobilized on the surface of GO-Chit using a simple method. The GO-Chi-Ni nanocomposites were characterized using Fourier Transforms Infrared Spectroscopy (FT-IR), Transmission Electron Microscopy (TEM), X-Ray Diffraction Measurements (XRD), and Atomic Adsorption Spectrometry (AAS). The GO-Chi-Ni nanoparticles demonstrated appropriate catalytic activity in reducing nitroarenes to aryl amines in the existence of sodium borohydride (NaBH4) aqueous solution as a hydrogen source at 80oC. This catalytic system applies environmentally benign water as a solvent that is cheap, easily accessible, non-toxic, non-volatile, non-flammable and thermally stable. This type of catalyst can be applied several times with no considerable change in its performance.

Microwave-Assisted Hydrothermal Synthesis of Hexagonal Columnar-Shaped Calcium Carbonate

2011 ◽  
Vol 239-242 ◽  
pp. 1643-1648 ◽  
Author(s):  
Qin Tang ◽  
Xiang Yong Chen ◽  
Wei Bing Hu ◽  
Gui Yun Zhou
Keyword(s):  
Calcium Carbonate ◽  
Calcium Chloride ◽  
Raw Materials ◽  
Molar Ratio ◽  
X Ray Diffraction ◽  
X Ray ◽  
Microwave Assisted ◽  
Transmission Electron ◽  
Ft Ir ◽  
Hexagonal Columnar

Calcium carbonate was obtained by the microwave-assisted hydrothermal synthesized technique using calcium chloride and urea as the raw materials. The uniform aragonite hexagonal columnar-shaped calcium carbonate with a diameter of 3.0~4.0μm and 70~120μm in length were produced without any additives at the molar ratio of urea and calcium chloride 1.5:1, microwave power 600W. The morphology, size and crystal structure were characterized by means of scanning electron microscope (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FT-IR).The formation process of aragonite hexagonal columnar-shaped calcium carbonate was discussed.

Application of Polysilicate Ferric Flocculant in Treatment of Tanning Wastewater

2010 ◽  
Vol 113-116 ◽  
pp. 96-99 ◽  
Author(s):  
Zhi Hui Sui ◽  
Xin Zhao ◽  
Xu Mei Song
Keyword(s):  
Ph Value ◽  
Raw Materials ◽  
Removal Rate ◽  
Amorphous Polymer ◽  
Infrared Spectrometry ◽  
X Ray Diffraction ◽  
X Ray ◽  
New Type ◽  
Polymer Flocculant ◽  
Better Than

A new type of inorganic polymer flocculant polysilicate ferric(PSF) was prepared by using pyrite slag as raw materials and used as flocculant in the treatment of tanning wastewater. The infrared spectrometry and X-ray diffraction had been adopted to characterize the product structure. The infrared spectrometry research indicates that Fe-O, Si-O-Fe and other groups exist in the PSF, which implies that chemical bonding reaction takes place between Fe and silicon in the PSF. X-ray diffraction analysis indicates that PSF is the amorphous polymer created upon mutual reaction between Fe3+ and PSi. The application experiment results show that the removal rate of S2-, SS, CODCr, Cr3+, and colority is 92.7%, 90.5%, 82.5％, 80.2% and 90.1% respectively in the condition where temperature is normal, pH value is 7.5 and dosage of the coagulant is 80mg/L. The flocculation effects of PSF in the treatment of tanning wastewater are much better than those of PAC and PFS.

scholarly journals A Salt-Assisted Combustion Method to Prepare Well-Dispersed Octahedral MnCr2O4Spinel Nanocrystals

2015 ◽  
Vol 2015 ◽  
pp. 1-5 ◽  
Author(s):  
Yuping Tong ◽  
Juntao Ma ◽  
Shunbo Zhao ◽  
Hongyuan Huo ◽  
Hailong Zhang
Keyword(s):  
Electron Microscopy ◽  
Raw Materials ◽  
Combustion Process ◽  
Combustion Method ◽  
X Ray Diffraction ◽  
Sem Images ◽  
Transmission Electron ◽  
Ft Ir ◽  
Average Size ◽  
Octahedral Nanocrystals

Well-dispersed nanocrystalline MnCr2O4was prepared by a salt-assisted combustion process using low-toxic glycine as fuel and Mn(NO3)2and Cr(NO3)3·9H2O as raw materials. The obtained products were characterized by X-ray Diffraction (XRD), Fourier Transform Infrared (FT-IR) spectroscopy, Raman spectroscopy, Transmission Electron Microscopy (TEM), and Scanning Electron Microscopy (SEM). The fabrication process was monitored by thermogravimetric and differential thermal analysis (TG-DTA). The phase formation process was detected by XRD, and MnCr2O4single phase with high crystallinity was formed at 700°C. TEM and SEM images revealed that the products were composed of well-dispersed octahedral nanocrystals with an average size of 80 nm. Inert salt-LiCl played an important role in breaking the network structure of agglomerated nanocrystallites.

scholarly journals Polyurethane Composite Foams Synthesized Using Bio-Polyols and Cellulose Filler

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3474
Author(s):  
Katarzyna Uram ◽  
Milena Leszczyńska ◽  
Aleksander Prociak ◽  
Anna Czajka ◽  
Michał Gloc ◽  
...  
Keyword(s):  
Cross Sections ◽  
Raw Materials ◽  
Polyurethane Foams ◽  
Degree Of Crystallinity ◽  
X Ray Diffraction ◽  
Polyurethane Composite ◽  
Composite Foams ◽  
Closed Cell ◽  
Ft Ir ◽  
The Fourier Transform

Rigid polyurethane foams were obtained using two types of renewable raw materials: bio-polyols and a cellulose filler (ARBOCEL® P 4000 X, JRS Rettenmaier, Rosenberg, Germany). A polyurethane system containing 40 wt.% of rapeseed oil-based polyols was modified with the cellulose filler in amounts of 1, 2, and 3 php (per hundred polyols). The cellulose was incorporated into the polyol premix as filler dispersion in a petrochemical polyol made using calenders. The cellulose filler was examined in terms of the degree of crystallinity using the powder X-ray diffraction PXRD -and the presence of bonds by means of the fourier transform infrared spectroscopy FT-IR. It was found that the addition of the cellulose filler increased the number of cells in the foams in both cross-sections—parallel and perpendicular to the direction of the foam growth—while reducing the sizes of those cells. Additionally, the foams had closed cell contents of more than 90% and initial thermal conductivity coefficients of 24.8 mW/m∙K. The insulation materials were dimensionally stable, especially at temperatures close to 0 °C, which qualifies them for use as insulation at low temperatures.

scholarly journals Hydrothermal Synthesis, Characterization and Exploration of Photocatalytic Activities of Polyoxometalate: Ni-CoWO4 Nanoparticles

Crystals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 456
Author(s):  
Fahad A. Alharthi ◽  
Hamdah S. Alanazi ◽  
Amjad Abdullah Alsyahi ◽  
Naushad Ahmad
Keyword(s):  
Electron Microscopy ◽  
Hydrothermal Synthesis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Structure Morphology ◽  
Photocatalytic Activities ◽  
Ft Ir ◽  
Photocatalytic Reactions ◽  
Cobalt Tungstate

This study demonstrated the hydrothermal synthesis of bimetallic nickel-cobalt tungstate nanostructures, Ni-CoWO4 (NCW-NPs), and their phase structure, morphology, porosity, and optical properties were examined using X-ray Diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), Scanning electron microscopy- energy dispersive X-ray spectroscopy (SEM-EDS), high resolution Transmission electron microscopy (HR-TEM), Brunauer-Emmett-Teller (BET) and Raman instruments. It was found that as-calcined NCW-NPs have a monoclinic phase with crystal size ~50–60 nm and is mesoporous. It possessed smooth, spherical, and cubic shape microstructures with defined fringe distance (~0.342 nm). The photocatalytic degradation of methylene blue (MB) and rose bengal (RB) dye in the presence of NCW-NPs was evaluated, and about 49.85% of MB in 150 min and 92.28% of RB in 90 min degraded under visible light. In addition, based on the scavenger’s study, the mechanism for photocatalytic reactions is proposed.

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