Biogenic silver nanoparticle impregnated hollow mesoporous silicalite-1: an efficient catalyst for p-nitrophenol reduction

2016 ◽  
Vol 40 (1) ◽  
pp. 50-53 ◽  
Author(s):  
Rituparna Das ◽  
Sourav Ghosh ◽  
Ipsita Hazra Chowdhury ◽  
Milan Kanti Naskar
Keyword(s):  
Catalytic Activity ◽  
Plant Extract ◽  
Silver Nanoparticle ◽  
Ag Nanoparticles ◽  
Efficient Catalyst ◽  
Nitrophenol Reduction

Hollow silicalite-1 impregnated with Ag nanoparticles using a plant extract shows excellent catalytic activity for 4-NP reduction.

Ag nanoparticles stabilized on cubic polyhedral oligomeric silsesquioxane cross-linked poly(N-isopropyl acrylamide-co-itaconic acid): An efficient catalyst for 4-nitrophenol reduction

2020 ◽  
Vol 13 (07) ◽  
pp. 2051040
Author(s):  
Vahid Rahimkhoei ◽  
Ali Akbari ◽  
Maryam Zirak ◽  
Bagher Eftekhari-Sis
Keyword(s):  
Itaconic Acid ◽  
Ag Nanoparticles ◽  
Zero Order ◽  
Polymeric Support ◽  
Efficient Catalyst ◽  
First Order ◽  
First Order Kinetics ◽  
Isopropyl Acrylamide ◽  
Nitrophenol Reduction ◽  
Oligomeric Silsesquioxane

Ag nanoparticles were synthesized and stabilized on a polymeric support, poly([Formula: see text]-isopropyl acrylamide-co-itaconic acid)/POSS, by simply reducing Ag[Formula: see text] ions adsorbed in the interior of the polymeric network. The prepared Ag@p(NIPAM-IA)/POSS was used as an efficient and recyclable catalyst for removal of the 4-nitrophenol (4-NP) contaminant by NaBH4-induced reduction to 4-aminophenol (4-AP) in aqueous solution. Different conditions including Ag content and amount of the nanocomposite, and also temperature of the 4-NP reduction were investigated. Also, two kinetic models, zero-order and first-order kinetics, were studied for the reduction of 4-NP to 4-AP.

Green synthesis and characterization of silver nanoparticles using Ferula latisecta leaf extract and their application as a catalyst for the safe and simple one-pot preparation of spirooxindoles in water

2016 ◽  
Vol 40 (4) ◽  
pp. 3343-3349 ◽  
Author(s):  
Zahra Rashid ◽  
Tara Moadi ◽  
Ramin Ghahremanzadeh
Keyword(s):  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Plant Extract ◽  
Ag Nanoparticles ◽  
Leaf Extract ◽  
Synthesis And Characterization ◽  
One Pot ◽  
Efficient Catalyst ◽  
Three Component Reaction

In this research, Ag nanoparticles were prepared via plant extract and applied as an efficient catalyst in a three component reaction for the synthesis of spirooxindols.

Silver nanoparticle-embedded RGO-nanosponge for superior catalytic activity towards 4-nitrophenol reduction

RSC Advances ◽  
2016 ◽  
Vol 6 (91) ◽  
pp. 88837-88845 ◽  
Author(s):  
Balakumar Vellaichamy ◽  
Prakash Periakaruppan
Keyword(s):  
Graphene Oxide ◽  
Catalytic Activity ◽  
Reduced Graphene Oxide ◽  
Silver Nanoparticle ◽  
Leaf Extract ◽  
Nitrophenol Reduction ◽  
Reduced Graphene ◽  
Silver Nanospheres

The present work highlights a bio-inspired synthesis of uniform 2 nm sized plasmonic silver nanospheres (Ag-NSs) embedded in reduced graphene oxide nanosponge (RGONS) using Tabebuia berteroi leaf extract.

Hierarchical macrotube/mesopore carbon decorated with mono-dispersed Ag nanoparticles as a highly active catalyst

2015 ◽  
Vol 17 (4) ◽  
pp. 2515-2523 ◽  
Author(s):  
Tuo Ji ◽  
Long Chen ◽  
Michael Schmitz ◽  
Forrest Sheng Bao ◽  
Jiahua Zhu
Keyword(s):  
Catalytic Activity ◽  
Porous Carbon ◽  
Ag Nanoparticles ◽  
Active Catalyst ◽  
Carbon Substrate ◽  
Reduction Reactions ◽  
Highly Active ◽  
Nitrophenol Reduction

Mono-dispersed Ag nanoparticles supported on hierarchical macrotube/mesopore porous carbon substrate show excellent catalytic activity in nitrophenol reduction reactions.

scholarly journals Ag Nanoparticles Stabilized on Cyclodextrin Polymer Decorated with Multi-Nitrogen Atom Containing Polymer: An Efficient Catalyst for the Synthesis of Xanthenes

Molecules ◽  
2020 ◽  
Vol 25 (2) ◽  
pp. 241 ◽  
Author(s):  
Samahe Sadjadi ◽  
Fatemeh Ghoreyshi Kahangi ◽  
Masoumeh Dorraj ◽  
Majid M. Heravi
Keyword(s):  
Catalytic Activity ◽  
Nitrogen Atom ◽  
Hybrid System ◽  
Ag Nanoparticles ◽  
Active Sites ◽  
Phase Transfer ◽  
High Catalytic Activity ◽  
Ag Nps ◽  
Efficient Catalyst ◽  
Cyclodextrin Polymer

In attempt to broaden the use of cyclodextrin polymer for catalytic purposes, a novel covalent hybrid system was prepared through growth of multi-nitrogen atom containing polymer (PMelamine) derived from reaction of ethylenediamine and 2,4,6-trichloro-1,3,5-triazine on the functionalized cyclodextrin polymer (CDNS). The resulting hybrid system was then utilized as a catalyst support for the immobilization of silver nanoparticles through using Cuscuta epithymum extract as a naturally-derived reducing agent. The catalytic activity of the catalyst, Ag@CDNS-N/PMelamine, for the synthesis of xanthenes through reaction of aldehydes and dimedone in aqueous media was examined. The results showed high catalytic activity and recyclability of the catalyst. It was believed that cyclodextrin in the backbone of the catalyst could act both as a capping agent for Ag nanoparticles and phase transfer agent to bring the hydrophobic substrates in the vicinity of the catalytic active sites and accelerate the reaction rate. Multi-nitrogen atoms on the polymer, on the other hand, could improve the Ag NPs anchoring and suppress their leaching.

A facile green synthesis of silver nanoparticle-decorated hydroxyapatite for efficient catalytic activity towards 4-nitrophenol reduction

2017 ◽  
Vol 44 (2) ◽  
pp. 1189-1208 ◽  
Author(s):  
Tushar Kanti Das ◽  
Sayan Ganguly ◽  
Poushali Bhawal ◽  
Subhadip Mondal ◽  
Narayan Ch Das
Keyword(s):  
Catalytic Activity ◽  
Green Synthesis ◽  
Silver Nanoparticle ◽  
Nitrophenol Reduction
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