Silver Nanoparticles Architectured HMP as a Recyclable Catalyst for Tetramic Acid and Propiolic Acid Synthesis through CO 2 Capture at Atmospheric Pressure

ChemCatChem ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 1055-1067 ◽  
Author(s):  
Swarbhanu Ghosh ◽  
Aniruddha Ghosh ◽  
Sk Riyajuddin ◽  
Somnath Sarkar ◽  
Arpita Hazra Chowdhury ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Atmospheric Pressure ◽  
Acid Synthesis ◽  
Recyclable Catalyst ◽  
Tetramic Acid ◽  
Propiolic Acid

Synthesis of silver nanoparticles by atmospheric-pressure pulsed discharge plasma in a slug flow system

2018 ◽  
Vol 58 (1) ◽  
pp. 016001 ◽  
Author(s):  
Motoki Yamada ◽  
Shigenori Takahashi ◽  
Wahyudiono ◽  
Noriharu Takada ◽  
Hideki Kanda ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Atmospheric Pressure ◽  
Slug Flow ◽  
Discharge Plasma ◽  
Flow System ◽  
Pulsed Discharge ◽  
Pulsed Discharge Plasma

scholarly journals In Situ Investigation of the Formation Kinematics of Plasma-Generated Silver Nanoparticles

Nanomaterials ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 555 ◽  
Author(s):  
Daniel Tasche ◽  
Mirco Weber ◽  
Julia Mrotzek ◽  
Christoph Gerhard ◽  
Stephan Wieneke ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Atmospheric Pressure ◽  
Nanoparticle Synthesis ◽  
Atmospheric Pressure Plasma ◽  
Spherical Particles ◽  
Synthesis Process ◽  
Plasma Exposure ◽  
Pressure Plasma ◽  
In Situ Investigation

In this publication, it is shown how to synthesize silver nanoparticles from silver cations out of aqueous solutions by the use of an atmospheric pressure plasma source. The use of an atmospheric pressure plasma leads to a very fast reduction of silver ions in extensive solvent volumes. In order to investigate the nanoparticle synthesis process, ultraviolet/visible (UV/VIS) absorption spectra were recorded in situ. By using transmission electron microscopy and by the analysis of UV/VIS spectra, the kinetics of silver nanoparticle formation by plasma influence can be seen in more detail. For example, there are two different sections visible in the synthesis during the plasma exposure process. The first section of the synthesis is characterized by a linear formation of small spherical particles of nearly constant size. The second section is predominated by saturation effects. Here, particle faults are increasingly formed, induced by changes in the particle shape and the fusion of those particles. The plasma exposure time, therefore, determines the shape and size distribution of the nanoparticles.

scholarly journals Bactericidal Silver Nanoparticles by Atmospheric Pressure Solution Plasma Processing

Nanomaterials ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 874 ◽  
Author(s):  
Janith Weerasinghe ◽  
Wenshao Li ◽  
Rusen Zhou ◽  
Renwu Zhou ◽  
Alexander Gissibl ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Atmospheric Pressure ◽  
Chemical Reduction ◽  
Cost Effective ◽  
Pressure Solution ◽  
Gram Negative Bacteria ◽  
Promising Alternative ◽  
Gram Negative ◽  
Transmission Electron ◽  
Solution Plasma Processing

Silver nanoparticles have applications in plasmonics, medicine, catalysis and electronics. We report a simple, cost-effective, facile and reproducible technique to synthesise silver nanoparticles via plasma-induced non-equilibrium liquid chemistry with the absence of a chemical reducing agent. Silver nanoparticles with tuneable sizes from 5.4 to 17.8 nm are synthesised and characterised using Transmission Electron Microscopy (TEM) and other analytic techniques. A mechanism for silver nanoparticle formation is also proposed. The antibacterial activity of the silver nanoparticles was investigated with gram-positive and gram-negative bacteria. The inhibition of both bacteria types was observed. This is a promising alternative method for the instant synthesis of silver nanoparticles, instead of the conventional chemical reduction route, for numerous applications.

The preparation of a recyclable catalyst of silver nanoparticles dispersed in a mesoporous silica nanofiber matrix

RSC Advances ◽  
2016 ◽  
Vol 6 (70) ◽  
pp. 65613-65618 ◽  
Author(s):  
Dalong Li ◽  
Mingdong Dong ◽  
Flemming Besenbacher ◽  
Yudong Huang ◽  
Menglin Chen
Keyword(s):  
Silver Nanoparticles ◽  
Mesoporous Silica ◽  
Recyclable Catalyst ◽  
Electrospinning Technique ◽  
Sliver Nanoparticles ◽  
Silica Nanofiber

A recyclable catalyst of sliver nanoparticles well dispersed in mesoporous silica was successfully synthesized via a straight-forward strategy combining an electrospinning technique with post-calcination.

Novel Method of Tetramic Acid Synthesis: Silver-Catalyzed Carbon Dioxide Incorporation into Propargylic Amine and Intramolecular Rearrangement

2014 ◽  
Vol 16 (9) ◽  
pp. 2430-2433 ◽  
Author(s):  
Tomonobu Ishida ◽  
Ryo Kobayashi ◽  
Tohru Yamada
Keyword(s):  
Carbon Dioxide ◽  
Acid Synthesis ◽  
Intramolecular Rearrangement ◽  
Tetramic Acid ◽  
Novel Method
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