scholarly journals Green Synthesis of Zinc based Nanoparticles for Thermal Industry based Applications

2019 ◽  
Vol 9 (2S4) ◽  
pp. 255-256
Keyword(s):  
Single Phase ◽  
Secondary Phase ◽  
Sem Analysis ◽  
Xrd Pattern ◽  
Hibiscus Rosa Sinensis ◽  
Nanoparticle Morphology ◽  
Phase Spinel ◽  
Ft Ir ◽  
Ir Analysis ◽  
Characterization Property

Spinel ZnAl2O4 nanoparticles were prepared effectively by simplistic, economical microwave heating method using Hibiscus rosa-sinensis extract as reducing agent. The samples were successfully characterized by XRD pattern, EDX spectra, FT-IR analysis, HR-SEM analysis, and VSM instrumentation techniques. XRD, EDX and FT-IR results demonstrated that the products contain a pure single-phase spinel structure lacking of other secondary phase impurities. SEM results confirmed the spherical shaped nanoparticle morphology of the sample. Magnetic characterization property was confirmed by VSM analysis. VSM hysteresis loop established the superparamegnetism of the sample and the magnetization (Ms) value of ZnAl2O4 is 0.023 emu/g.

scholarly journals Effect on Magnetic Properties of Zinc Doped Nano Ferrites Synthesized by Precursor or Method

2013 ◽  
Vol 19 ◽  
pp. 37-43 ◽  
Author(s):  
T. Anjaneyulu ◽  
P. Narayana Murthy ◽  
S.M. Rafi ◽  
S. Bademiya ◽  
G. Samuel John
Keyword(s):  
Spinel Structure ◽  
Single Phase ◽  
Sem Analysis ◽  
Particle Sizes ◽  
X Ray Diffraction ◽  
Zn Doping ◽  
Zn Ferrite ◽  
Phase Spinel ◽  
Ir Analysis ◽  
Zn Ions

Nanocrystalline Cu-Zn ferrites have been synthesized using precursor method. Cu-Zn ferrites were formed at low temperature without any impurities. The particle sizes were observed to decrease from 60 nm to 50 nm with increasing non-magnetic Zn doping. Cu is used to decrease the sintering temperature. The X-ray diffraction (XRD) and IR analysis of Cu-Zn revealed the formation of Single-Phase Spinel structure at very low annealing temperature. The particle sizes observed from XRD is very well in agreement with SEM analysis. Cu-Zn ferrite nanoparticles were observed to be dependent on the particle size. Saturation (Ms) and Remanence (Mr) magnetization of ferrites increases due to the modifications occurred among the A-B, A-A and B-B interactions of Spinel structure. The Coercive force (Hc) decreases with increase of Zn ions concentration.

scholarly journals Transcrystallization of Isotactic Polypropylene/Bacterial Cellulose Hamburger Composite

Polymers ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 508 ◽  
Author(s):  
Bo Wang ◽  
Fu-hua Lin ◽  
Xiang-yang Li ◽  
Xu-ran Ji ◽  
Si-xiao Liu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Bacterial Cellulose ◽  
Isotactic Polypropylene ◽  
Crystallization Rate ◽  
Sem Analysis ◽  
Hydroxyl Groups ◽  
Hot Press ◽  
Ft Ir ◽  
Ir Analysis ◽  
The Fourier Transform

Isotactic polypropylene (iPP) is a commonly used thermoplastic polymer with many excellent properties. But high brittleness, especially at low temperatures, limits the use of iPP. The presence of transcrystallization of iPP makes it possible for fiber-reinforced iPP composites with higher strength. Bacterial cellulose (BC) is a kind of cellulose with great potential to be used as a new filler to reinforce iPP due to its high crystallinity, biodegradability and efficient mechanical properties. In this study, the iPP/BC hamburger composite was prepared by a simple hot press and maleic anhydride grafted polypropylene (MAPP) was used to improve the interface compatibility of iPP and BC. The polarizing microscope (POM) photograph shows that BC successfully induces the transcrystallization of iPP. The differential Scanning Calorimeter (DSC) date proves that the addition of BC could improve the thermal properties and crystallization rate of the composite. Especially, this change is more obvious of the iPP/MAPP/BC. The mechanical properties of the iPP/BC composites were greatly increased. This DSC date is higher than BC; we used BC particles to enhance the iPP in our previous research. The scanning Electron Microscope (SEM) analysis intuitively shows that the interface of the iPP/MAPP/BC is more smooth and flat than the iPP/BC. The fourier Transform infrared spectroscopy (FT-IR) analysis of the iPP/BC hamburger composites was shown that a new C=O group vibration appeared at 1743 cm−1, which indicated that the hydrogen bond structure of BC molecules was weakened and some hydroxyl groups were substituted after modification which can increase the lipophilicity of BC. These results indicated that the BC fiber can easily induce the transcrystallization of iPP, which has excellent mechanical properties. Moreover, the addition of MAPP contributes greatly to the interface compatibility of iPP and BC.

Analysis on Products and Residues of Liquefaction of Wheat Straw & Polyester in Supercritical Ethanol

2011 ◽  
Vol 236-238 ◽  
pp. 142-145
Author(s):  
Zhu Long ◽  
Yu Feng Long ◽  
Jun Jun He ◽  
Hai Bo Deng
Keyword(s):  
Wheat Straw ◽  
Degradation Products ◽  
Sem Analysis ◽  
Supercritical Conditions ◽  
Powder Surface ◽  
Phenol Derivatives ◽  
Ft Ir ◽  
Ir Analysis ◽  
Supercritical Ethanol ◽  
Liquefaction Process

The mixture of wheat straw (WS) and polyester (PC) was liquefied in supercritical ethanol. Liquefied products produced and liquefied residue from the liquefaction under different supercritical conditions were analyzed by GC-MS, SEM and IR. GC-MS analysis of the liquefied products indicates that ethanol would decompose. And the most compounds in the liquefied product had the structure of phenol and phenol derivatives, which came from the degradation products of PC and WS. SEM analysis show that the wheat straw powder possessed larger particles with smooth surfaces while the residue from liquefaction had smaller particles with rough surfaces because of drastically degraded from the wheat straw powder surface under supercritical conditions. FT-IR analysis showed that the lignin was easily degraded during the liquefaction process, and also found to the cellulose is very difficult to liquefy for its crystalline structure.

scholarly journals Plant Extract Assisted Green Synthesis and Structural Studies of Spinel Nial2o4 Nano-Catalysts

2019 ◽  
Vol 9 (2S4) ◽  
pp. 257-259
Keyword(s):  
Plant Extract ◽  
Aloe Vera ◽  
Combustion Method ◽  
Sem Analysis ◽  
Cubic Phase ◽  
Structural Studies ◽  
Xrd Pattern ◽  
Heating Method ◽  
Ft Ir ◽  
Nano Catalysts

Spinel NiAl2O4 nanoparticles were synthesized via Aloe vera plant extract microwave heating method. Aloe vera plant extract-assisted combustion method makes straightforward synthesis, which is alternative process of spinel preparation. The synthesized spinel NiAl2O4 nanoparticles was successfully characterized by powder XRD pattern, FT-IR, EDX analysis, HR-SEM analysis, and VSM techniques. XRD, FT-IR and EDS results established the development of spinel and single cubic phase NiAl2O4 nanocrystals. The formation of spherical shaped nanoparticles was affirmed by HR-SEM technique. VSM measurements revealed that NiAl2O4 sample have superparamagnetic behavior.

scholarly journals PREPARATION OF KANTALAUHA BHASMA BY TWO DIFFERENT METHODS AND ITS SINDOORA NIRMANA: A COMPARATIVE PHARMACEUTICO-ANALYTICAL STUDY

2020 ◽  
Vol 11 (5) ◽  
pp. 46-54
Author(s):  
Sanoop K ◽  
B Vinayachandra Shetty
Keyword(s):  
Particle Size ◽  
Analytical Study ◽  
Sem Analysis ◽  
Absorption Peak ◽  
Ft Ir ◽  
Ir Analysis ◽  
Modern Analytical

According to Rasa Ratna Samucchaya, Kantalauha is considered as the best variety among Lauhas for Lauha Bhasma compared with Tikshna and Munda Lauha. The present study deals with the “Preparation of Kantalauha bhasma by two different methods and its Sindoora Nirmana- A Comparative Pharmaceutico-Analytical Study. Two different Kantalauha Bhasma and their Kanta Sindoora were prepared as per classical reference and the samples were subjected to Classical and Modern Analytical Parameters, XRD, EDX, SEM, FT-IR, and NPST. Pharmaceutically Kantalauha Bhasma 1 has attained Bhasma Siddhi Lakshanas in 16 Putas and Kantalauha Bhasma 2 in 3 Putas. Both the samples of Kanta Sindoora attained Sindoora Varna by 3 Putas. SEM analysis showed that Kantalauha Bhasma 1 and Kanta Sindoora 1 attained the smallest particle size. XRD showed the presence of compound Fe2O3 in all the samples. EDAX confirmed the presence of Fe, O2, Mg, Al, Si, S, K and Ca. The FT-IR analysis of all the samples shows the presence of 10 Absorption Peak frequencies cm-1. NPST proved the fineness and proper formation of Bhasma samples. Among the two different methods of Kantalauha Bhasma preparation, the 1st method is found better in yield wise and cost-wise. The second method saved the time as it attained Bhasma Siddhi Lakshanas within 3 puts. In the case of Kanta Sindoora, yield wise both the samples were found almost the same.

scholarly journals The Synthesis and Characterization of Sol-Gel-Derived SrTiO3-BiMnO3 Solid Solutions

Crystals ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1125
Author(s):  
Dovydas Karoblis ◽  
Ramunas Diliautas ◽  
Eva Raudonyte-Svirbutaviciene ◽  
Kestutis Mazeika ◽  
Dalis Baltrunas ◽  
...  
Keyword(s):  
Solid Solutions ◽  
Single Phase ◽  
Perovskite Phase ◽  
Sol Gel ◽  
X Ray Diffraction ◽  
Paramagnetic Materials ◽  
Ft Ir ◽  
Ir Analysis ◽  
Superposition Effect

In this study, the aqueous sol-gel method was employed for the synthesis of (1−x)SrTiO3-xBiMnO3 solid solutions. Powder X-ray diffraction analysis confirmed the formation of single-phase perovskites with a cubic structure up to x = 0.3. A further increase of the BiMnO3 content led to the formation of a negligible amount of neighboring Mn3O4 impurity, along with the major perovskite phase. Infrared (FT-IR) analysis of the synthesized specimens showed gradual spectral change associated with the superposition effect of Mn-O and Ti-O bond lengths. By introducing BiMnO3 into the SrTiO3 crystal structure, the size of the grains increased drastically, which was confirmed by means of scanning electron microscopy. Magnetization studies revealed that all solid solutions containing the BiMnO3 component can be characterized as paramagnetic materials. It was observed that magnetization values clearly correlate with the chemical composition of powders, and the gradual increase of the BiMnO3 content resulted in noticeably higher magnetization values.

Monodispersed Magnetic Fluids: Synthesis and Characterization

2009 ◽  
Vol 155 ◽  
pp. 155-162 ◽  
Author(s):  
Kinnari Parekh ◽  
R.V. Upadhyay ◽  
V.K. Aswal
Keyword(s):  
Particle Size ◽  
Size Distribution ◽  
Single Phase ◽  
Magnetic Measurement ◽  
Spherical Shape ◽  
Uniform Size ◽  
Xrd Pattern ◽  
X Ray ◽  
Monodispersed Particles ◽  
Phase Spinel

Magnetite and Co ferrite particles were synthesized with control of particle size distribution via non-aqueous route. The XRD pattern shows the formation of single phase spinel structure with the particle size of 96 Å and 80 Å respectively for magnetite and cobalt ferrite. TEM image of the same shows the particles are nearly spherical with the size matches with that obtained from X-ray and the size distribution is less than 5%. Magnetic measurement also shows the particles of uniform size with high value of saturation magnetization at room temperature compared to that obtained by other route. SANS study confirms our results of monodispersed particles with spherical shape.

Co-Ferrite (CoFe2O4): A Material with High Magnetostriction Produced by Sol-Gel Method

2011 ◽  
Vol 326 ◽  
pp. 157-164
Author(s):  
Nasir Mehmood ◽  
Roland Grössinger ◽  
Rieko Sato Turtelli ◽  
Muhammad Aamir Raza ◽  
Sohail Afzal Khan ◽  
...  
Keyword(s):  
Saturation Magnetization ◽  
Single Phase ◽  
Annealing Temperature ◽  
Sol Gel ◽  
Hysteresis Loops ◽  
Xrd Pattern ◽  
Gel Method ◽  
Heat Treated ◽  
Different Temperatures ◽  
Phase Spinel

Polycrystalline Co-ferrite was produced by modified citrate gel method. Samples were afterward heat treated at different temperatures upto 1300°C. The XRD pattern shows that all samples exhibit a single phase spinel structure and improvement and sharpness in intensity of peaks with increasing annealing temperature. Measurement of hysteresis loops demonstrate that after the heat treatment a saturation magnetization of 60- 84 emu/gis obtained. Measurements of the longitudinal magnetostriction gave values between 20 ppm and 130 ppm. Magnetostriction increases gradually with increase in annealing temperature and becomes highest when the saturation magnetization values are larger.

Synthesis of Zinc Phthalocyanine and its Dimerization in DMF

2014 ◽  
Vol 926-930 ◽  
pp. 270-273
Author(s):  
Zhen Hua Cheng ◽  
Na Cui ◽  
Hong Xiao Zhang ◽  
Li Jun Zhu ◽  
Dao Hong Xia
Keyword(s):  
Sem Analysis ◽  
Red Shift ◽  
Zinc Phthalocyanine ◽  
Dimethyl Formamide ◽  
Improved Method ◽  
Vis Spectroscopy ◽  
Ft Ir ◽  
Ir Analysis ◽  
High Yields ◽  
Maximum Absorption Wavelength

Zinc phthalocyanine was prepared with improved method with high yields and characterized by XRD and FT-IR analysis. The SEM analysis was also conducted to demonstrate the apparent morphology of the synthesized compound. Dimerization of the zinc phthalocyanine was measured by UV-Vis spectroscopy in N, N-dimethyl formamide (DMF). The red–shift of maximum absorption wavelength and deviation from Lambert-Beer law was observed with increasing the concentration.

Synthesis, Characterization and Bioactivity Studies of Calcium Silicate Bioceramics

2012 ◽  
Vol 584 ◽  
pp. 479-483 ◽  
Author(s):  
R. Lakshmi ◽  
Swamiappan Sasikumar
Keyword(s):  
Sol Gel ◽  
Combustion Process ◽  
Calcium Nitrate ◽  
Secondary Phase ◽  
X Ray Diffraction ◽  
Xrd Pattern ◽  
Sem Image ◽  
Gel Combustion ◽  
Ft Ir ◽  
Highly Porous

Wollastonite is one of the most widely used bioceramic due to its biocompatibility and bioactivity. Wollastonite (CaSiO3) was synthesized by sol-gel combustion process using citric acid as a fuel/reductant and nitrate as an oxidant. Calcium nitrate was taken as a source of calcium and tetraethyl orthosilicate was taken as the source of silicate. The obtained product was characterized by powder X-ray diffraction, Fourier - Transform Infrared spectroscopy and Scanning electron microscopy. The XRD pattern shows that the product formed is a pure and single phasic wollastonite. The FT-IR spectra revealed that there is no secondary phase present in the product. The SEM image shows that the product is highly porous. The particle size calculated using Scheerer’s formula shows that the particles are in a nano regime.

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