A comparison of the catalytic efficiency of copper-based bimetallic nanoparticles in the click reactions

2020 ◽  
Vol 44 (9-10) ◽  
pp. 566-570
Author(s):  
Ning Li ◽  
Xiang Liu
Keyword(s):  
Catalytic Activity ◽  
Quantum Dot ◽  
Physical Properties ◽  
Bimetallic Nanoparticles ◽  
Click Reaction ◽  
Catalytic Efficiency ◽  
Click Reactions ◽  
Graphene Quantum Dot ◽  
Catalytic Activities ◽  
Monometallic Nanoparticles

Compared to monometallic nanoparticles, bimetallic nanoparticles have attracted wide attention due to their physical properties, excellent catalytic activity, high regioselectivity, selectivity, and stability. Here, we have first synthesized 10 different kinds of graphene quantum dot–stabilized Cu-based bimetallic nanoparticles (including CoCu, NiCu, RuCu, RhCu, PdCu, AgCu, IrCu, AuCu, FeCu, and PtCu) and compared their catalytic activities in a CuAAC click reaction. Among them, RhCu provides the highest yield of the desired product in the click reaction (77%). The catalytic activity of these MCu in the click reaction is in the order: RhCu > PdCu > AuCu > CoCu > PtCu > AgCu > NiCu > CuNP > RuCu > FeCu > IrCu.

NiAg-graphene quantum dot-graphene hybrid with high oxidase-like catalytic activity for sensitive colorimetric detection of malathion

2021 ◽  
Author(s):  
Xu Dan ◽  
Ruiyi Li ◽  
Qinsheng Wang ◽  
Yongqiang Yang ◽  
Haiyan Zhu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Graphene Oxide ◽  
Catalytic Activity ◽  
Quantum Dot ◽  
Colorimetric Detection ◽  
Graphene Quantum Dots ◽  
Functionalized Graphene ◽  
Graphene Quantum Dot ◽  
Nickel Silver

The paper reports the synthesis of nickel-silver-graphene quantum dot-graphene hybrid. Histidine-functionalized graphene quantum dots (His-GQDs) were bonded to graphene oxide (GO) and then combined with Ni2+ and Ag+ to form...

N, S co-doped graphene quantum dot–decorated Fe3O4 nanostructures: Preparation, characterization and catalytic activity

2019 ◽  
Vol 127 ◽  
pp. 140-150 ◽  
Author(s):  
Saeed Sajjadi ◽  
Alireza Khataee ◽  
Reza Darvishi Cheshmeh Soltani ◽  
Aliyeh Hasanzadeh
Keyword(s):  
Catalytic Activity ◽  
Quantum Dot ◽  
Graphene Quantum Dot ◽  
Doped Graphene ◽  
Co Doped

scholarly journals Catalytic performance of Ag, Au and Ag-Au nanoparticles synthesized by lichen extract

2018 ◽  
Vol 7 (5) ◽  
pp. 433-440 ◽  
Author(s):  
Zafer Çıplak ◽  
Ceren Gökalp ◽  
Bengü Getiren ◽  
Atila Yıldız ◽  
Nuray Yıldız
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Fourier Transform ◽  
Catalytic Activity ◽  
Au Nanoparticles ◽  
Bimetallic Nanoparticles ◽  
Catalytic Performance ◽  
Catalytic Activities ◽  
Transmission Electron ◽  
Vis Spectroscopy

Abstract In the present study, the green chemistry approach for the biosynthesis of Ag, Au and Ag-Au bimetallic nanoparticles (NPs) was applied using lichen extract [Cetraria islandica (L.) Ach.]. The lichen extract acts both as a reducing and stabilizing agent. The monometallic and bimetallic NPs were characterized by transmission electron microscopy (TEM), ultraviolet-visible (UV-Vis) spectroscopy and Fourier transform infrared (FTIR) spectroscopy. The results showed that NPs were successfully synthesized and the prepared structures were generally spherical. The synthesized nanostructures exhibited excellent catalytic activities towards reduction of nitrophenols (4-nitrophenol; 4-NP) to aminophenols (4-aminophenol; 4-AP) with sodium borohydride (NaBH4). It was determined that bimetallic NPs exhibit more effective catalytic activity than monometallic Ag and Au nanostructures. This is the first report on 4-NP reduction with Ag, Au and Au-Ag NP catalysts prepared by lichen extract.

A graphene quantum dot decorated SrRuO3mesoporous film as an efficient counter electrode for high-performance dye-sensitized solar cells

2017 ◽  
Vol 5 (34) ◽  
pp. 17848-17855 ◽  
Author(s):  
Tao Liu ◽  
Kun Yu ◽  
Lina Gao ◽  
Hui Chen ◽  
Ning Wang ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Catalytic Activity ◽  
Quantum Dot ◽  
High Performance ◽  
Counter Electrode ◽  
Dye Sensitized Solar Cells ◽  
Synergic Effect ◽  
Graphene Quantum Dot ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

The predominant synergic effect of GQDs and SrRuO3CEs drives faster ion diffusions and electron transfer, thereby contributing to excellent catalytic activity of the SRO–GQD CE towards I3−reduction.

scholarly journals Graphene Quantum Dot Modified Fe3 O4 Nanoparticles Stabilize PdCu Nanoparticles for Enhanced Catalytic Activity in the Sonogashira Reaction

ChemCatChem ◽  
2017 ◽  
Vol 9 (8) ◽  
pp. 1442-1449 ◽  
Author(s):  
Mohammad Gholinejad ◽  
Jahantab Ahmadi ◽  
Carmen Nájera ◽  
Mohammad Seyedhamzeh ◽  
Fatemeh Zareh ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Quantum Dot ◽  
Sonogashira Reaction ◽  
Graphene Quantum Dot

Facile Fabrication of Nanoparticles in the Nanospace of Ultrathin TiO2-Gel Films: Composition, Morphology and Catalytic Activity

2003 ◽  
Vol 794 ◽  
Author(s):  
Junhui He ◽  
Toyoki Kunitake
Keyword(s):  
Catalytic Activity ◽  
Low Temperature ◽  
Bimetallic Nanoparticles ◽  
In Situ Synthesis ◽  
Synthesis Of Nanoparticles ◽  
Catalytic Activities ◽  
Monodisperse Nanoparticles ◽  
Facile Fabrication ◽  
Tio2 Gel

ABSTRACTIn this article, we present in-situ synthesis of nanoparticles of various compositions and morphologies in the nanospace of ultrathin TiO2-gel films using low temperature H2 and O2 plasmas as reductant and oxidant, respectively. Parameters that influence the formation of nanoparticles were investigated and discussed. Reversible chemical transformation was found to give monodisperse nanoparticles. Catalytic activities of Pd monometallic and Ag-core/Pd-shell bimetallic nanoparticles were tested for hydrogenation of methyl acrylate. The much enhanced catalytic activity is attributed mainly to a large ratio of the surface Pd atoms.

scholarly journals Nanocomposite of hydrophobic cellulose aerogel/graphene quantum dot/Pd: synthesis, characterization, and catalytic application

RSC Advances ◽  
2019 ◽  
Vol 9 (30) ◽  
pp. 17129-17136 ◽  
Author(s):  
Sajjad Keshipour ◽  
Masoumeh Khezerloo
Keyword(s):  
Quantum Dots ◽  
Catalytic Activity ◽  
Quantum Dot ◽  
Graphene Quantum Dots ◽  
High Catalytic Activity ◽  
Graphene Quantum Dot ◽  
Cellulose Aerogel ◽  
Catalytic Application

Novel hydrophobic cellulose aerogel (CA) supported graphene quantum dots (GQD)/Pd were synthesized with high lipophilicity, superior porosity as well as high catalytic activity.

Biosynthesis of Fe, Pd, and Fe–Pd bimetallic nanoparticles and their application as recyclable catalysts for [3 + 2] cycloaddition reaction: a comparative approach

2015 ◽  
Vol 5 (5) ◽  
pp. 2612-2621 ◽  
Author(s):  
Kanchan Mishra ◽  
Nagaraj Basavegowda ◽  
Yong Rok Lee
Keyword(s):  
Catalytic Activity ◽  
Bimetallic Nanoparticles ◽  
Cycloaddition Reaction ◽  
Comparative Approach ◽  
Recyclable Catalysts ◽  
Monometallic Nanoparticles

The Fe–Pd bimetallic nanoparticles exhibit strong catalytic activity compared to their respective monometallic nanoparticles.

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