Structural, impedance, and modulus spectroscopic studies on Y2/3Cu3Ti3.95In0.05O12polycrystalline material prepared by flame synthesis method

2016 ◽  
Vol 51 (7-9) ◽  
pp. 735-752 ◽  
Author(s):  
Laxman Singh ◽  
Shiv Sunder Yadava ◽  
Won Seok Woo ◽  
Uma Shanker Rai ◽  
K. D. Mandal ◽  
...  
Keyword(s):  
Synthesis Method ◽  
Spectroscopic Studies ◽  
Flame Synthesis

scholarly journals Sonochemical-assisted magnesium borate synthesis from different boron sources

2017 ◽  
Vol 19 (1) ◽  
pp. 81-88 ◽  
Author(s):  
Meral Yildirim ◽  
Azmi Seyhun Kipcak ◽  
Emek Moroydor Derun
Keyword(s):  
High Efficiency ◽  
Synthesis Method ◽  
Spectroscopic Studies ◽  
X Ray Diffraction ◽  
Magnesium Borate ◽  
Ir And Raman Spectroscopies ◽  
Ft Ir ◽  
Surface Morphologies ◽  
Ir And Raman ◽  
Good Agreement

Abstract In this study, sonochemical-assisted magnesium borate synthesis is studied from different boron sources. Various reaction parameters are successfully applied by a simple and green method. X-ray diffraction (XRD), Fourier transform infrared (FT-IR) and Raman spectroscopies are used to characterize the synthesized magnesium borates on the other hand surface morphologies are investigated by using scanning electron microscope (SEM). The XRD analyses showed that the products were admontite [MgO(B2O3)3 · 7(H2O)] with JCPDS (Joint Committee on Powder Diffraction Standards) no. of 01-076-0540 and mcallisterite [Mg2(B6O7(OH)6)2 · 9(H2O)] with JCPDS no. of 01-070-1902. The results that found in the spectroscopic studies were in a good agreement with characteristic magnesium borate bands in both regions of infra-red and visible. According to SEM results, obtained borates were in micro and sub-micro scales. By the use of ultrasonication, reaction yields were found between 84.2 and 97.9%. As a result, it is concluded that the sonochemical approach is a practicable synthesis method to get high efficiency and high crystallinity in the synthesis magnesium borate compounds.

Green synthesis, structural characterization, and catalytic activity of silver nanoparticles stabilized with Bridelia retusa leaf extract

2018 ◽  
Vol 7 (1) ◽  
pp. 30-37 ◽  
Author(s):  
Ramesh Vinayagam ◽  
Thivaharan Varadavenkatesan ◽  
Raja Selvaraj
Keyword(s):  
Silver Nanoparticles ◽  
Rhodamine B ◽  
Leaf Extract ◽  
Dye Degradation ◽  
Synthesis Method ◽  
Degradation Process ◽  
Spectroscopic Studies ◽  
Metallic Silver ◽  
X Ray ◽  
Bridelia Retusa

Abstract:An environmentally benign method to synthesize silver nanoparticles (SNPs) using the leaf extract ofBridelia retusawas developed. The UV-Vis absorption spectrum of the synthesized SNPs displayed a surface plasmon peak at 420 nm. Scanning electron microscopy (SEM) revealed the irregular shaped nanoparticles, and energy dispersive X-ray (EDX) ascertained the presence of metallic silver by showing a strong signal at 3 eV. The crystalline structure of metallic silver was confirmed by X-ray diffraction (XRD). The mean size of the SNPs was calculated as 16.21 nm. Fourier infrared (FT-IR) spectroscopic studies displayed specific bands for various functional groups and affirmed the function of reduction and stabilization of SNPs. The stability was endorsed by the zeta potential value of −18.1 mV. The results evidenced that this leaf extract-mediated synthesis method is eco-friendly, rapid, and cheap. The catalytic power of the SNPs was investigated for Rhodamine B dye degradation. The SNPs completely degraded Rhodamine B within 9 min; thus, the dye degradation process was very rapid. The pseudo-first order degradation constant was found out to be 0.1323 min−1. This paves the way for the future development of novel nano-catalysts to reduce environmental pollution.

scholarly journals The Effect of Pyrolysis Temperature and Time of Polypropylene on Quality of Carbon Nanotube with Flame Synthesis Method

2018 ◽  
Vol 67 ◽  
pp. 03030
Author(s):  
Praswasti P.D.K Wulan ◽  
Juan Octavian Daniel Sidauruk ◽  
Juli Ayu Ningtyas
Keyword(s):  
Particle Size ◽  
Pyrolysis Temperature ◽  
Synthesis Method ◽  
Average Crystallite Size ◽  
Flame Synthesis ◽  
Combustion Gas ◽  
Yield And Quality ◽  
Optimal Quality

Variations of the pyrolysis temperature and time are carried out to obtain the correlation between those variables and the number of pyrolysis gases, as well as the yield and quality of produced CNT. PP is pyrolyzed at a temperature range of 525-600°C to produce pyrolizate gases. The flame synthesis method is used to convert PP plastic waste into CNT alongside with the use of wired mesh stainless steel type SS 316 as the substrate. The substrate is pre-treated by oxidative heat treatment at 800°C for 10 minutes before the synthesis to breach the outer chromium layer and make grains on the catalytic surface to enable CNT to grow. Pyrolizate gases are mixed with oxygen flowed from a venturi, so combustion reaction occurs. The combustion gas is flowed to the synthesis reactor to produce CNT at 800°C. Characterization of produced CNT is carried out using XRD, GC-FID, and TEM. The highest yield is obtained at the pyrolysis temperature of 525°C for 45 minutes. While the optimal quality based on the structure, crystalline and particle size is achieved at the pyrolysis temperature of 525°C for 30 minutes which results in CNT with 23.81 nm of average crystallite size and 104.8 nm of particle size.

A Novel One-Step Flame Synthesis Method for Tungsten-Doped CCTO

2015 ◽  
Vol 99 (1) ◽  
pp. 27-34 ◽  
Author(s):  
Laxman Singh ◽  
Byung Cheol Sin ◽  
Ill Won Kim ◽  
K.D. Mandal ◽  
Hoeil Chung ◽  
...  
Keyword(s):  
Synthesis Method ◽  
Flame Synthesis ◽  
One Step

scholarly journals G060015 Development of Nanoparticle Flame Synthesis Method by Flash Boiling Spray

2012 ◽  
Vol 2012 (0) ◽  
pp. _G060015-1-_G060015-5
Author(s):  
Masaya MATSUSHITA ◽  
Motohiro OSHIMA ◽  
Jiro SENDA ◽  
Kozo ISHIDA
Keyword(s):  
Synthesis Method ◽  
Flame Synthesis ◽  
Flash Boiling

M220 Development of Flame Synthesis Method for Nanoparticles using Flash Boiling Spray

2015 ◽  
Vol 2015.90 (0) ◽  
pp. 294
Author(s):  
Anna YONEDA ◽  
Takumi BAN ◽  
Motohiro OSHIMA ◽  
Eriko MATSUMURA ◽  
Jiro SENDA ◽  
...  
Keyword(s):  
Synthesis Method ◽  
Flame Synthesis ◽  
Flash Boiling

scholarly journals Elucidation of the Mechanism of Phase Transition in a Zinc Formate Framework Templated by a Diammonium Cation—Structural, Phonon and Dielectric Studies

Crystals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 213
Author(s):  
Aneta Ciupa-Litwa ◽  
Jan Janczak ◽  
Paulina Peksa ◽  
Adam Sieradzki
Keyword(s):  
Phase Transition ◽  
Metal Organic Framework ◽  
Structural Phase ◽  
Synthesis Method ◽  
Spectroscopic Studies ◽  
X Ray Diffraction ◽  
Dipolar Relaxation ◽  
Asymmetric Shape ◽  
Metal Organic ◽  
Anionic Framework

In this paper we present the synthesis method and a detailed description of the crystal structure, as well as thermal, dielectric and phonon properties, of the [CH3NH2CH2CH2NH2CH3][Zn2(HCOO)6] (dmenH2-Zn) metal organic framework. The negative charge of the anionic framework ([Zn2(HCOO)6]2-) is balanced by N,N′-dimethylethylenediamine (dmenH22+) ions located in the voids of the framework. Thermal analysis revealed that dmenH2-Zn underwent a reversible structural phase transition at around room temperature (Tc~300 K). The single-crystal X-ray diffraction showed that dmenH22+ templates were dynamically disordered at 295 K, since N-H…O bonds were too weak to surmount their thermally activated motions. Reduction in the temperature resulted in ordering of the dmenH22+ cations as a consequence of freezing of their reorientational movements. This behavior caused a symmetry change from P-31c (trigonal) to C 2/c (monoclinic). The mechanism of the observed phase transition of dmenH2-Zn compound was also investigated by temperature-dependent IR measurements. These spectroscopic studies showed that the ordering of the dmenH22+ ions also resulted in the distortion of the anionic framework. Dielectric investigations revealed the occurrence of the dipolar relaxation process clearly defined in the monoclinic phase. The asymmetric shape of the studied process, which indicated a non-Debye-like relaxation, was analyzed using the Havriliak–Negami relaxation function, leading to an Ea value of approximately 0.36 eV.

A simple, rapid and efficient flame synthesis of ultrafine LiNi0.95−xCoxTi0.05O2 (x = 0.25 and 0.30): a versatile route to synthesize Ni-rich cathode materials for Li-ion batteries

2018 ◽  
Vol 42 (1) ◽  
pp. 372-379 ◽  
Author(s):  
Laxman Singh ◽  
Jiwon Lee ◽  
Geun Wan Kim ◽  
Minsoo Ji ◽  
Chaewon Moon ◽  
...  
Keyword(s):  
Cathode Materials ◽  
Synthesis Method ◽  
Flame Synthesis ◽  
Li Ion Batteries ◽  
Li Ion

A simple, rapid, and efficient flame synthesis method was developed to fabricate LiNi0.95−xCoxTi0.05O2 (x = 0.25 and 0.30) cathode materials for Li-ion batteries.

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