scholarly journals A novel sodium-fluorescent crystal

2021 ◽  
Vol 8 (3) ◽  
Author(s):  
Yunsu Ma ◽  
Yongjie Liu ◽  
Yuan Wang ◽  
Fan Zhang ◽  
Dongzhi Yang
Keyword(s):  
Fluorescence Emission ◽  
X Ray Diffraction ◽  
Blue Fluorescence ◽  
One Pot ◽  
X Ray ◽  
Cell Parameters ◽  
Dimethylaminobenzoic Acid ◽  
Crystal Space ◽  
Fluorescence Spectrometer ◽  
Scanning Electron

In this work, a novel sodium-fluorescent crystal (Na-FS) was synthesized from 4-dimethylaminobenzoic acid and sodium hydroxide by one-pot hydrothermal method. The structure and conformation of Na-FS were confirmed by single-crystal X-ray diffraction and scanning electron microscope, and the optical properties were studied by fluorescence spectrometer. The results showed that: Na-FS was a triclinic crystal, space group was P-1, cell parameters a , b and c were 10.5113(3), 15.9198(5) and 15.9560(5) Å, respectively, and the number of independent atoms Z in a structure cell was two. Additionally, Na-FS has a blue fluorescence emission (around 360 nm under excited at the range of 230–300 nm) with great photostability and photobleaching resistance, and the quantum yield of Na-FS is 30.58%.

X-ray powder diffraction data of LaNi0.5Ti0.45Co0.05O3, LaNi0.45Co0.05Ti0.5O3, and LaNi0.5Ti0.5O3 perovskites

2021 ◽  
pp. 1-6
Author(s):  
Mariana M. V. M. Souza ◽  
Alex Maza ◽  
Pablo V. Tuza
Keyword(s):  
Crystal Structure ◽  
Rietveld Method ◽  
Pechini Method ◽  
Powder Diffraction Data ◽  
X Ray Diffraction ◽  
Unit Cell Parameters ◽  
X Ray ◽  
Cell Parameters ◽  
Modified Pechini Method ◽  
Scanning Electron

In the present work, LaNi0.5Ti0.45Co0.05O3, LaNi0.45Co0.05Ti0.5O3, and LaNi0.5Ti0.5O3 perovskites were synthesized by the modified Pechini method. These materials were characterized using X-ray fluorescence, scanning electron microscopy, and powder X-ray diffraction coupled to the Rietveld method. The crystal structure of these materials is orthorhombic, with space group Pbnm (No 62). The unit-cell parameters are a = 5.535(5) Å, b = 5.527(3) Å, c = 7.819(7) Å, V = 239.2(3) Å3, for the LaNi0.5Ti0.45Co0.05O3, a = 5.538(6) Å, b = 5.528(4) Å, c = 7.825(10) Å, V = 239.5(4) Å3, for the LaNi0.45Co0.05Ti0.5O3, and a = 5.540(2) Å, b = 5.5334(15) Å, c = 7.834(3) Å, V = 240.2(1) Å3, for the LaNi0.5Ti0.5O3.

Carboxyl graphene reinforced melamine-based polyamide nanocomposites

2021 ◽  
pp. 089270572110514
Author(s):  
Himanshu V Madhad ◽  
Dilip V Vasava
Keyword(s):  
Electron Microscopy ◽  
Decomposition Temperature ◽  
Differential Scanning Calorimetric ◽  
X Ray Diffraction ◽  
One Pot ◽  
X Ray ◽  
Mild Conditions ◽  
Thermal Stability Of ◽  
Infrared Techniques ◽  
Scanning Electron

Over the years, various types of techniques have been used for the synthesis of nanocomposites. In this work, melamine-based polyamide (PA) was synthesized using a one-pot polycondensation method under mild conditions. carboxyl graphene (CG)/PA nanocomposites (CGMPA) were prepared by CG nanofiller loadings of 1, 3, and 5 wt.% via delamination/adsorption approach. The prepared CGMPA nanocomposites were characterized using different analyses, such as Fourier transform infrared techniques (FTIR), field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), differential scanning calorimetric (DSC), and thermogravimetric analysis (TGA). The effects of the CG on the thermal properties of the CGMPA nanocomposites were significant. The results showed that the melting temperature (Tm) of neat PA and CGMPA were increased from 378°C to 393°C suggested better dispersion of CG in PA matrix. The decomposition temperature of PA was increased from 451°C to 463°C in CGMPA nanocomposites indicates the better thermal stability of PA matrix by addition of CG.

A Novel Technique of Flyash Utilization: Preparation of Silica from Flyash by Alkali Leaching

2010 ◽  
Vol 434-435 ◽  
pp. 814-815
Author(s):  
An Ran Guo ◽  
Jia Chen Liu ◽  
Yi Bing Sun ◽  
Wen Jun Lian ◽  
Lu Yang
Keyword(s):  
High Purity ◽  
Sodium Hydroxide Solution ◽  
X Ray Diffraction ◽  
X Ray ◽  
Novel Technique ◽  
Reinforcing Agent ◽  
Alkali Leaching ◽  
A New Technique ◽  
Fluorescence Spectrometer ◽  
Scanning Electron

A new technique of flyash utilization was presented and high-purity silica was prepared by alkali leaching. The flyash was added into sodium hydroxide solution, and then the suspension was heated to 115 °C for 30 min. After filtrated, the filtrate was collected and carbon dioxide was imported into the solution. Finally, the silica would precipitate from the solution. The silica was characterized by scanning electron microscopy, X-ray diffraction and X-ray fluorescence spectrometer. The high-purity silica prepared from flyash was qualified for the rubber reinforcing agent used in shoemaking.

Synthesis and Up-Conversion Luminescent Properties of Na(Y1.5Na0.5)F6 Hexagonal Prism

2016 ◽  
Vol 697 ◽  
pp. 318-321
Author(s):  
Cui Ping Zhong ◽  
Jie Jun Zhang ◽  
Shu Wang Duo
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Chelating Agent ◽  
Luminescent Properties ◽  
Hexagonal Prism ◽  
X Ray Diffraction ◽  
X Ray ◽  
Near Ultraviolet ◽  
Fluorescence Spectrometer ◽  
Scanning Electron

Na (Y1.5Na0.5)F6 microparticks were prepared by hydrothermal method. EDTA as the chelating agent. The samples were characterized by X-ray diffraction, scanning electron microscopy and fluorescence spectrometer. The X-ray diffraction indicates that the crystal shows a hexagon phase structure. Under the excitation of 980nm laser, the Na (Y1.5Na0.5)F6 exhibited strong up-conversion light: 4F9/2→4I15/2(red), 4H11/2/4S3/2→4I15/2(green) and 4G11/2→2H9/2 (near-ultraviolet).

Preparation of Hollow Sodalite/NiO Composite Spheres in Polyacrylamide Hydrogels

2012 ◽  
Vol 251 ◽  
pp. 314-317
Author(s):  
Li Han ◽  
Qin Wang ◽  
Cun Biao Guo ◽  
Jun Xu ◽  
Yu Zhong Zhan ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Nickel Oxide ◽  
Hollow Structure ◽  
Soft Template ◽  
Oxide Content ◽  
X Ray Diffraction ◽  
One Pot ◽  
X Ray ◽  
Polyacrylamide Hydrogels ◽  
Scanning Electron

In the absence of sphere templates, hollow sodailte/NiO composite spheres were obtained by one-pot hydrothermal synthesis by using polyacrylamide hydrogels as "soft template". And the effect of nickel oxide content on the synthesis of hollow complex spheres was studied. The samples were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDX). The results showed that when the content of nickel oxide was about 0.5%, the hollow sodalite/NiO composite spheres with high crystallinity, stable crystal, and obvious hollow structure could be successfully synthesized.

scholarly journals Synthesis and Molecular Structure of 4′,9′,4″,9″-Tetra-tert-butyl-1′,6′,1″,6″-tetramethoxy-2,5-dioxa[3.3]metabiphenylophane

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Tetsuji Moriguchi ◽  
Tatsuya Egami ◽  
Akihiko Tsuge
Keyword(s):  
Molecular Structure ◽  
Condensation Reaction ◽  
Solvent Molecule ◽  
Dihedral Angles ◽  
Monoclinic Space Group ◽  
X Ray Diffraction ◽  
X Ray ◽  
Cell Parameters ◽  
H Nmr ◽  
Crystal Space

A large calixarene-like metacyclophane, 4′,9′,4″,9″-tetra-tert-butyl-1′,6′,1″,6″-tetramethoxy-2,5-dioxa[3.3]metabiphenylophane, was synthesized by an intermolecular condensation reaction of its corresponding bischloromethyl-biphenyl and bishydroxymethyl-biphenyl precursors. After molecular characterization by 1H NMR spectroscopy and mass spectrometry, the compound generated single crystals by recrystallization from a dichloromethane/hexane mixture, facilitating an exact conformational determination via X-ray diffraction analysis. The crystal was found to belong to the monoclinic space group P21/n with cell parameters a = 19.908(2) Å, b = 9.7193(11) Å, c = 23.350(3) Å, β = 109.594(1)°, and Dcalc=1.150 g/cm3 at 90 K. The compound adopted quite strained 1,2-alternate-like conformations because its biphenyl parts displayed large dihedral angles and rigidity. The crystal did not incorporate any solvent molecule but its molecular cavity and crystal space were effectively filled by the substituents.

scholarly journals One-Pot Access to Diverse Functionalized Pyran Annulated Heterocyclic Systems Using SCMNPs@BPy-SO3H as a Novel Magnetic Nanocatalyst

2020 ◽  
Vol 15 (2) ◽  
pp. 348-366 ◽  
Author(s):  
Ke Chen ◽  
Guangzu He ◽  
Qiong Tang ◽  
Qahtan A.Yousif
Keyword(s):  
Magnetic Field ◽  
Reaction Times ◽  
Vibrating Sample Magnetometry ◽  
X Ray Diffraction ◽  
Magnetic Nanocatalyst ◽  
Permanent Magnetic Field ◽  
One Pot ◽  
X Ray ◽  
The One ◽  
Scanning Electron

The SCMNPs@BPy-SO3H catalyst was prepared and characterized using Fourier Transform Infrared Spectroscopy (FTIR), Thermogravimetric Analysis (TGA), Vibrating Sample Magnetometry (VSM), Energy Dispersive X-ray Spectroscopy (EDX), X-ray Diffraction (XRD), and Scanning Electron Microscopy (SEM). Afterwards, its capability was efficiently used to promote the one-pot, three-component synthesis of pyrano[2,3-c]pyrazole and 2-amino-3-cyano-pyrano[3,2-c]chromen-5(4H)-one derivatives. The strategy resulted in the desired products with excellent yields and short reaction times. The SCMNPs@BPy-SO3H catalyst was readily recovered using a permanent magnetic field and it was reused in six runs with a slight decrease in catalytic activity. Copyright © 2020 BCREC Group. All rights reserved 

Preparation of Hierarchical CuO Nanoparticles and their Photocatalytic Activity

2013 ◽  
Vol 785-786 ◽  
pp. 378-381
Author(s):  
Li Min Wang ◽  
Hong Ming Sun ◽  
Zhong Chao Ma ◽  
Ao Xuan Wang
Keyword(s):  
Cuo Nanoparticles ◽  
Formation Mechanisms ◽  
Dihydrogen Phosphate ◽  
Ammonium Dihydrogen Phosphate ◽  
X Ray Diffraction ◽  
One Pot ◽  
Hierarchical Nanostructures ◽  
X Ray ◽  
Morphology And Structure ◽  
Scanning Electron

The uniform hierarchical and microspheric copper oxide (CuO) nanostructures, which have been successfully prepared via a simple one-pot method. The detailed morphology and structure of the synthesized hierarchical and microspheric nanostructures were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD) and UVvisible spectroscopy. The morphology of CuO particles depends on the ammonium dihydrogen phosphate (ADP) used in the synthesis, the formation mechanisms were proposed based on the experimental results. The catalytic activity of as-synthesized CuO was demonstrated by catalytic oxidation of methylene blue in the presence of hydrogen peroxide (H2O2) and CuO with hierarchical nanostructures was found to be the best catalyst.

scholarly journals One-pot synthesis of 2-amino-4H-chromene derivatives by MNPs@Cu as an effective and reusable magnetic nanocatalyst

RSC Advances ◽  
2019 ◽  
Vol 9 (23) ◽  
pp. 12801-12812 ◽  
Author(s):  
Wanzheng MA ◽  
Abdol Ghaffar Ebadi ◽  
Mostafa shahbazi sabil ◽  
Ramin Javahershenas ◽  
Giorgos Jimenez
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Vibrating Sample Magnetometry ◽  
X Ray Diffraction ◽  
Magnetic Nanocatalyst ◽  
One Pot ◽  
X Ray ◽  
Scanning Electron

MNPs@Cu as an effective, recyclable nanocatalyst was prepared and characterized using Fourier transform infrared spectroscopy, thermogravimetric analysis vibrating sample magnetometry, scanning electron microscopy, energy dispersive X-ray spectroscopy and X-ray diffraction.

scholarly journals Approach to the knowledge of preservation of pleistocenic bone: The case of a Gomphothere cranium from the site of Tepeticpac, Tlaxcala, Mexico

2019 ◽  
Vol 36 (2) ◽  
pp. 170-182
Author(s):  
Luisa Straulino ◽  
Luisa Mainou ◽  
Teresa Pi ◽  
Sergey Sedov ◽  
Aurelio López-Corral ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Energy Dispersive Spectroscopy ◽  
Crystallinity Index ◽  
X Ray Diffraction ◽  
Volcanic Origin ◽  
X Ray ◽  
Cell Parameters ◽  
Scanning Electron ◽  
Microbial Attack

An almost complete cranium of a gomphoterium found in Tepeticpac, Tlaxcala, was analyzed with X-ray diffraction (XRD), Petrography and Scanning Electron Microscopy with Energy Dispersive Spectroscopy (SEM-EDS) to stablish the transformations of the bone during its burial. The analyses assessed that the bone mineral (bioapatite) had suffered modifications in mineral composition, “crystallinity index”, cell parameters and CO2 content. However, the paleohistological structure of the bone was not significantly affected, although evidence of microbial attack was found in the bone surfaces. The filling minerals of bone macro and micro porosity were also analyzed; its main filling minerals are calcite (micrite and sparite), clays, and minerals of volcanic origin.

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