scholarly journals Green synthesis of Au nanoparticles using an aqueous extract ofStachys lavandulifoliaand their catalytic performance for alkyne/aldehyde/amine A3coupling reactions

RSC Advances ◽  
2018 ◽  
Vol 8 (67) ◽  
pp. 38186-38195 ◽  
Author(s):  
Hojat Veisi ◽  
Maliheh Farokhi ◽  
Mona Hamelian ◽  
Saba Hemmati
Keyword(s):  
Green Synthesis ◽  
Metal Nanoparticles ◽  
Aqueous Extract ◽  
Reaction Rate ◽  
Au Nanoparticles ◽  
Catalytic Performance ◽  
High Reaction ◽  
High Reaction Rate

High reaction rate and easy availability make green synthesis of metal nanoparticles noticeable.

scholarly journals Metal Nanoparticles as Green Catalysts

Materials ◽  
2019 ◽  
Vol 12 (21) ◽  
pp. 3602 ◽  
Author(s):  
Neel Narayan ◽  
Ashokkumar Meiyazhagan ◽  
Robert Vajtai
Keyword(s):  
Catalytic Activity ◽  
Composite Materials ◽  
Green Synthesis ◽  
Metal Nanoparticles ◽  
Surface Area ◽  
Significant Role ◽  
High Surface ◽  
High Surface Area ◽  
Catalytic Performance ◽  
Materials Development

Nanoparticles play a significant role in various fields ranging from electronics to composite materials development. Among them, metal nanoparticles have attracted much attention in recent decades due to their high surface area, selectivity, tunable morphologies, and remarkable catalytic activity. In this review, we discuss various possibilities for the synthesis of different metal nanoparticles; specifically, we address some of the green synthesis approaches. In the second part of the paper, we review the catalytic performance of the most commonly used metal nanoparticles and we explore a few roadblocks to the commercialization of the developed metal nanoparticles as efficient catalysts.

Closed Loop Controlled ER-Actuator

1996 ◽  
Vol 10 (23n24) ◽  
pp. 2867-2876 ◽  
Author(s):  
C. WOLFF
Keyword(s):  
Reaction Rate ◽  
Closed Loop ◽  
Dynamic Behaviour ◽  
Volume Flow ◽  
Hydraulic Systems ◽  
High Reaction ◽  
Er Fluids ◽  
High Reaction Rate

The results of the investigation regarding the suitability of ERF when applied in hydraulics have shown so far that constructing electrorheological flow resistors for the control of pressure and volume flow is possible in principle. One of the main advantages when using the ER-technology in hydraulic systems can be seen in the high reaction rate of the ER-effect. The investigations presented in this article document the dynamic qualities of ER-fluids by means of a practical exploitation for the control of a cylinder actuator. Due to the particular possibilities for design of ER-control resistors a compact cylinder has resulted which differs considerably from traditional cylinder actuators in its construction and dynamic behaviour.

Enhanced Catalytic Activity of Magnetic Bimetallic Ag–Au Nanoparticles Mediated by Surface Plasmon Resonance

2021 ◽  
Vol 21 (5) ◽  
pp. 3107-3114
Author(s):  
Zhuo-Rui Li ◽  
Geng Zhu ◽  
Guo-Zhi Han
Keyword(s):  
Catalytic Activity ◽  
Surface Plasmon Resonance ◽  
Metal Nanoparticles ◽  
Noble Metal ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Au Nanoparticles ◽  
Catalytic Performance ◽  
Reduction Reaction ◽  
Noble Metal Nanoparticles

We firstly discover the enhanced catalytic activity of magnetic noble metal nanoparticles mediated by surface plasmon resonance. Under light irradiation with certain wavelength, the catalytic performance of magnetic noble metal nanoparticles shows changes with different degrees and directions that are associated with the surface plasmon resonance (SPR) of the noble metal. Moreover, the coupling of silver and gold allows the catalytic performance of magnetic bimetallic Ag–Au nanoparticles to show more positive response to surface plasmon resonance. The magnetic bimetallic Ag–Au nanoparticles show excellent catalytic performance toward the reduction reaction of aromatic nitro group, and corresponding rate constant of the catalytic reduction reaction increases about three times with light irradiation.

Preparation of Au nanoparticles by Anthemis xylopoda flowers aqueous extract and their application for alkyne/aldehyde/amine A3-type coupling reactions

RSC Advances ◽  
2015 ◽  
Vol 5 (57) ◽  
pp. 46240-46246 ◽  
Author(s):  
Mahmoud Nasrollahzadeh ◽  
S. Mohammad Sajadi
Keyword(s):  
Gold Nanoparticles ◽  
Green Synthesis ◽  
Aqueous Extract ◽  
Au Nanoparticles ◽  
Coupling Reactions ◽  
Au Nps ◽  
Type Coupling

This paper reports on the green synthesis of gold nanoparticles (Au NPs) by Anthemis xylopoda flowers aqueous extract without the addition of surfactant agents and their application as stable catalysts for the synthesis of propargylamines.

Catalytic antibody light chain capable of cleaving a chemokine receptor CCR-5 peptide with a high reaction rate constant

2004 ◽  
Vol 86 (2) ◽  
pp. 217-225 ◽  
Author(s):  
Yukie Mitsuda ◽  
Emi Hifumi ◽  
Kumi Tsuruhata ◽  
Hiroko Fujinami ◽  
Naoki Yamamoto ◽  
...  
Keyword(s):  
Rate Constant ◽  
Chemokine Receptor ◽  
Light Chain ◽  
Reaction Rate ◽  
Reaction Rate Constant ◽  
Catalytic Antibody ◽  
High Reaction ◽  
High Reaction Rate

scholarly journals High NH3-SCR reaction rate with low dependence on O2 partial pressure over Al-rich Cu–*BEA zeolite

RSC Advances ◽  
2021 ◽  
Vol 11 (17) ◽  
pp. 10381-10384
Author(s):  
Yusuke Ohata ◽  
Takeshi Ohnishi ◽  
Takahiko Moteki ◽  
Masaru Ogura
Keyword(s):  
Partial Pressure ◽  
Reaction Rate ◽  
Reaction Condition ◽  
Bea Zeolite ◽  
Nh3 Scr ◽  
High Reaction ◽  
O2 Partial Pressure ◽  
Zeolite P ◽  
High Reaction Rate

It was revealed that Al-rich Cu–*BEA zeolite exhibit high reaction rate for NH3-SCR at 473 K in low PO2 reaction condition.

Reproducible preparation of Au/TS-1 with high reaction rate for gas phase epoxidation of propylene

2012 ◽  
Vol 287 ◽  
pp. 178-189 ◽  
Author(s):  
Wen-Sheng Lee ◽  
M. Cem Akatay ◽  
Eric A. Stach ◽  
Fabio H. Ribeiro ◽  
W. Nicholas Delgass
Keyword(s):  
Gas Phase ◽  
Reaction Rate ◽  
Epoxidation Of Propylene ◽  
High Reaction ◽  
High Reaction Rate

A ruthenium-based plasmonic hybrid photocatalyst for aqueous carbon dioxide conversion with a high reaction rate and selectivity

2019 ◽  
Vol 7 (29) ◽  
pp. 17254-17260 ◽  
Author(s):  
Hwiseok Jun ◽  
Shinyoung Choi ◽  
Moon Young Yang ◽  
Yoon Sung Nam
Keyword(s):  
Carbon Dioxide ◽  
Formic Acid ◽  
Reaction Rate ◽  
Ruthenium Complex ◽  
Low Ph ◽  
Carbon Dioxide Conversion ◽  
High Reaction ◽  
Hybrid Photocatalyst ◽  
High Reaction Rate

A cis-ruthenium complex fixed on a plasmonic Au/TiO2 nanostructure efficiently converts CO2 into formic acid even in low pH water.

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