scholarly journals Microwave-mediated synthesis of silver nanoparticles on various metal-alginate composites: evaluation of catalytic activity and thermal stability of the composites in solvent-free acylation reaction of amine and alcohols

2020 ◽  
Vol 2 (2) ◽  
Author(s):  
Supriya ◽  
Ravikant Kaspate ◽  
Chandan Kumar Pal ◽  
Sonali Sengupta ◽  
Jayanta Kumar Basu
Keyword(s):  
Thermal Stability ◽  
Silver Nanoparticles ◽  
Catalytic Activity ◽  
Solvent Free ◽  
Acylation Reaction ◽  
Thermal Stability Of

Catalytic activity of niobium oxynitride and carbide I. Preparation, characterization and thermal stability of finely divided niobium oxynitrides

1994 ◽  
Vol 119 (2) ◽  
pp. 223-240 ◽  
Author(s):  
Hak Soo Kim ◽  
Chae Ho Shin ◽  
Guy Bugli ◽  
Monique Bureau-Tardy ◽  
Gerald Djega-Mariadassou
Keyword(s):  
Thermal Stability ◽  
Catalytic Activity ◽  
Thermal Stability Of

scholarly journals The Sintering of Au Nanoparticles on Flat {100}, {111} and Zigzagged {111}-Nanofacetted Structures of Ceria and Its Influence on Catalytic Activity in CO Oxidation and CO PROX

2020 ◽  
Author(s):  
O. S. Bezkrovnyi ◽  
P. Kraszkiewicz ◽  
W. Mista ◽  
L. Kepinski
Keyword(s):  
Electron Microscopy ◽  
Thermal Stability ◽  
Catalytic Activity ◽  
Beneficial Effect ◽  
Co Oxidation ◽  
Au Nanoparticles ◽  
Ceria Support ◽  
Ceria Catalysts ◽  
Thermal Stability Of

Abstract The thermal stability of Au nanoparticles on ceria support of various morphology (nanocubes, nanooctahedra, and {111}-nanofacetted nanocubes) in oxidizing and reducing atmospheres was investigated by electron microscopy. A beneficial effect of the reconstruction of edges of ceria nanocubes into zigzagged {111}-nanofacetted structures on the inhibition of sintering of Au nanoparticles was shown. The influence of different morphology of Au particles on various ceria supports on the reducibility and catalytic activity in CO oxidation, and CO PROX of Au/ceria catalysts was also investigated and discussed. It was shown, that ceria nanocubes with flat {110} terminated edges are more suitable as a support for Au nanoparticles, used to catalyze CO oxidation, than zigzagged {111}- nanofacetted structures. Graphic Abstract

Characterization of PET-Silver Nanocomposite Filaments

2018 ◽  
Vol 930 ◽  
pp. 224-229
Author(s):  
Marcos Antônio Guerra ◽  
Jeferson Prado Swerts ◽  
Mei Abe Funcia ◽  
Neide Aparecida Mariano ◽  
Maria Gabriela Nogueira Campos
Keyword(s):  
Electron Microscopy ◽  
Thermal Stability ◽  
Scanning Electron Microscopy ◽  
Silver Nanoparticles ◽  
Addition Method ◽  
X Ray ◽  
Silver Nanocomposite ◽  
Thermal Stability Of ◽  
Scanning Electron

Polyethylene terephthalate (PET) fiber is a very versatile fiber that can be produced with different properties, such as antimicrobial activity. This study aims to synthesize antimicrobial PET filaments incorporated with silver nanoparticles immobilized in silica (NPAg-Si) by bulk additive method. Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray (EDX) characterized the obtained filaments at concentrations (w/w) of 0.008%, 0.016%, 0.032%, 0.047% and 0.063% NPAg-Si, in order to identify the nanoparticles and analyze their dispersion in the polymeric matrix. Moreover, thermogravimetric analysis (TGA) was carry out to confirm the presence and concentration of the silver nanoparticles in the filaments as well as the thermal stability of the nanocomposites. The bulk addition method was efficient to produce PET-Silver filaments with silver nanoparticles homogeneously dispersed in the PET matrix.

Catalytic Activity and Thermal Stability of Arc Plasma Deposited Pt Nano-Particles on CeO2–Al2O3

2015 ◽  
Vol 15 (11) ◽  
pp. 8494-8501 ◽  
Author(s):  
Young Eun Jeong ◽  
Pullur Anil Kumar ◽  
Hee Lack Choi ◽  
Kwan-Young Lee ◽  
Heon Phil Ha
Keyword(s):  
Thermal Stability ◽  
Catalytic Activity ◽  
Nano Particles ◽  
Arc Plasma ◽  
Thermal Stability Of

Synthesis of Stable Oil Dispersions of Silver Nanoparticles

2011 ◽  
Vol 694 ◽  
pp. 73-78
Author(s):  
Dan Li
Keyword(s):  
Thermal Stability ◽  
Silver Nanoparticles ◽  
Ascorbic Acid ◽  
Spectral Analysis ◽  
Oleic Acid ◽  
Aqueous Medium ◽  
Aqueous Phase ◽  
Thermal Stability Of

Hydrophobic silver nanoparticles have been carried out by use of ascorbic acid in cyclohexylamine and aqueous medium. Nanosilver can be effectively coated with oleic acid and possesses oil-soluble property. Oleic acid as an extractant is also effective at stabilizing particles of similar size in an oil phase when the AgNO3 is reduced in a coexisting aqueous phase. Stable spherical silver nanoparticles 15~25 nm in diameter with a well-crystallized structure were obtained at 120 °C. The thermal stability of surface-coated silver prepared in cyclohexylamine solution was monitored by UV-vis spectral analysis.

scholarly journals Enhanced catalytic activity and thermal stability of lipase bound to oxide nanosheets

RSC Advances ◽  
2018 ◽  
Vol 8 (36) ◽  
pp. 20347-20352
Author(s):  
Akane Yamada ◽  
Kai Kamada ◽  
Taro Ueda ◽  
Takeo Hyodo ◽  
Yasuhiro Shimizu ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Catalytic Activity ◽  
Thermal Stability Of ◽  
Titanate Nanosheets

The present study reports the preferable effects of binding of lipase to titanate nanosheets. The binding largely enhanced biocatalytic activity and thermal stability of lipase especially at diluted concentrations.

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