scholarly journals Coordination Chemistry of Proton. In Situ Synthesis and X-Ray Structural Analysis of 2-Hydroxyethanaminium Picrate, HOCH2CH2NH3+·C6H2N3O7−

1990 ◽  
Vol 63 (5) ◽  
pp. 1512-1514 ◽  
Author(s):  
Narinder S. Poonia ◽  
Ramesh Chandra ◽  
W. S. Sheldrick
Keyword(s):  
Coordination Chemistry ◽  
Structural Analysis ◽  
In Situ Synthesis ◽  
X Ray

Machine Learning Powered by Principal Component Descriptors as the Key for Sorted Structural Fit of XANES

2021 ◽  
Author(s):  
Andrea Martini ◽  
Alexander A. Guda ◽  
Sergey A. Guda ◽  
Aram L. Bugaev ◽  
Olga V. Safonova ◽  
...  
Keyword(s):  
Machine Learning ◽  
Structural Analysis ◽  
Synchrotron Radiation ◽  
Free Electron Laser ◽  
Principal Component ◽  
Analytical Tool ◽  
X Ray ◽  
Radiation Sources ◽  
X Ray Absorption

Modern synchrotron radiation sources and free electron laser made X-ray absorption spectroscopy (XAS) an analytical tool for the structural analysis of materials under in situ or operando conditions. Fourier approach...

A green in situ synthesis of silver nanoparticles on cotton fabrics using Aloe vera leaf extraction for durable ultraviolet protection and antibacterial activity

2016 ◽  
Vol 87 (19) ◽  
pp. 2407-2419 ◽  
Author(s):  
Qingqing Zhou ◽  
Jingchun Lv ◽  
Yu Ren ◽  
Jiayi Chen ◽  
Dawei Gao ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Aloe Vera ◽  
Cotton Fabrics ◽  
In Situ Synthesis ◽  
Uv Protection ◽  
X Ray ◽  
Jcpds File ◽  
Laundering Durability

This study presented a simple and environmentally friendly method of in situ synthesis of silver nanoparticles (AgNPs) on cotton fabrics for durable ultraviolet (UV) protection and antibacterial activity using Aloe vera leaf extraction (AVE) as a reducing and stabilizing agent. Cotton fabrics were pretreated in water, and then immersed in AgNO3 and AVE, respectively. Cotton fabrics were characterized by small angle X-ray diffraction (XRD), scanning electron microscopy (SEM), thermogravimetric analysis, UV protection, antibacterial activity, and laundering durability. Comparing with the smooth surface of the control cotton fabric, SEM and energy dispersive X-ray spectrometry (EDX) results showed that there were a considerable number of Ag2O and AgNPs loading on the surface of the pretreated and Ag loaded cotton fabrics. The XRD pattern indicated, respectively, the existence of Ag2O and AgNPs, the structures of which were similar to JCPDS File No.65-3289 and JCPDS File No. 01-071-4613 on the pretreated and Ag loaded cotton fabrics. The pretreated and Ag loaded cotton fabrics showed excellent UV protection, antibacterial activity, and laundering durability, especially the Ag loaded cotton fabric, of which the UV protection factor value and transmission of UVA were 148 and 1.11%, respectively, after 20 washing cycles, and the clear zone width was more than 4 mm against E. coli or S. aureus. AgNPs facilitated the improvement of the thermal property of the cotton fabrics. Thus this facile in situ reduction of AgNPs with AVE may bring a promising and green strategy to produce functional textiles.

Reaction Synthesis of MoSi2-Al2O3 Composite Using MoO3, Al and Si Powders

1994 ◽  
Vol 365 ◽  
Author(s):  
Seetharama C. Deevi ◽  
Sarojini Deevi
Keyword(s):  
In Situ Synthesis ◽  
Heating Rates ◽  
X Ray ◽  
Thermite Mixture ◽  
Rate Determining Step ◽  
Simultaneous Oxidation ◽  
Al2o3 Composite ◽  
Different Temperatures

ABSTRACTIn-situ synthesis of a composite of MoSi2-Al2O3 was carried out by reacting a thermite mixture consisting of MoO3, Al, and Si powders. The reaction was found to be extremely fast and violent, and a diluent was required to moderate the reaction. Thermal behavior of the thermite mixture was studied using DTA at different heating rates, and DTA was interrupted at different temperatures to determine the reaction mechanism. X-ray characterization of the products obtained at different temperatures reveals that the mechanism consists of a reduction of MoO3 by Al to MoO2 followed by a simultaneous oxidation of Al to Al2O3 and synthesis reaction between reduced Mo and Si to form MoSi2. The rate determining step is found to be reduction of MoO2 by Al and oxidation of Al to Al2O3. The thermite reaction was moderated by adding Mo and Si to the mixture of MoO3, Al, and Si such that the ratio of MoSi2 to the thermite was in the range of 60:40 to 90:10.

Investment Casting of Titanium Matrix Composites

2005 ◽  
Vol 475-479 ◽  
pp. 2551-2554 ◽  
Author(s):  
Si Young Sung ◽  
Keun Chang Park ◽  
Myoung Gyun Kim ◽  
Young Jig Kim
Keyword(s):  
In Situ Synthesis ◽  
Matrix Composites ◽  
Reaction Products ◽  
X Ray Diffraction ◽  
Titanium Matrix ◽  
Titanium Matrix Composites ◽  
X Ray ◽  
Conventional Casting ◽  
Electron Probe Micro Analyzer

The aim of the present work is to investigate the possibility of in-situ synthesis and net-shape of the titanium matrix composites (TMCs) using a casting route. From the scanning electron microscopy (SEM), electron probe micro-analyzer (EPMA), X-ray diffraction (XRD) and thermodynamic calculations, the spherical TiC and needle like TiB reinforced hybrid TMCs could be obtained by the conventional casting route between titanium and B4C. No melts-mold reaction could be possible between (TiC+TiB) hybrid TMCs and the SKKU mold, since the mold is composed of interstitial and substitutional reaction products. Not only the sound in-situ synthesis but also the economic net-shape of TMCs could be possible by conventional casting route.

IN SITU SYNTHESIS, CHARACTERIZATION AND FREQUENCY DEPENDENT AC CONDUCTIVITY OF POLYANILINE/CoFe2O4 NANOCOMPOSITES

2011 ◽  
Vol 01 (03) ◽  
pp. 357-362 ◽  
Author(s):  
G. D. PRASANNA ◽  
H. S. JAYANNA
Keyword(s):  
Ac Conductivity ◽  
Room Temperature ◽  
In Situ Polymerization ◽  
In Situ Synthesis ◽  
Electron Micrograph ◽  
Frequency Range ◽  
X Ray Diffraction ◽  
Scanning Electron Micrograph ◽  
X Ray

The polyaniline (PANI)/ CoFe2O4 nanocomposites were prepared by an In Situ polymerization of aniline in an aqueous solution. The composites were characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectrum,thermogravimetric analysis (TGA) and scanning electron micrograph (SEM). The AC conductivity and dielectric properties of these composites were investigated in the frequency range 1 kHz–10 MHz at room temperature. The AC conductivity was found to be constant up to 1 MHz and thereafter it increases steeply and it was observed maximum for the PANI with 60 wt% of CoFe2O4 nanocomposite. At lower frequencies the values of dielectric constant is maximum for pure CoFe2O4 nanoparticles.

A simple electrochemical cell for in-situ fundamental structural analysis using synchrotron X-ray powder diffraction

2013 ◽  
Vol 244 ◽  
pp. 109-114 ◽  
Author(s):  
William R. Brant ◽  
Siegbert Schmid ◽  
Guodong Du ◽  
Qinfen Gu ◽  
Neeraj Sharma
Keyword(s):  
Structural Analysis ◽  
Powder Diffraction ◽  
Electrochemical Cell ◽  
X Ray

In situ Synthesis of Mixed-Valent Manganese Oxide Nanocrystals:  An In situ Synchrotron X-ray Diffraction Study

2006 ◽  
Vol 128 (14) ◽  
pp. 4570-4571 ◽  
Author(s):  
Xiong-Fei Shen ◽  
Yun-Shuang Ding ◽  
Jonathan C. Hanson ◽  
Mark Aindow ◽  
Steven L. Suib
Keyword(s):  
Manganese Oxide ◽  
Diffraction Study ◽  
In Situ Synthesis ◽  
X Ray Diffraction ◽  
X Ray
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