scholarly journals Palladium Nanoparticles Supported on Graphene Oxide as Catalysts for the Synthesis of Diarylketones

Catalysts ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 319 ◽  
Author(s):  
Anna Trzeciak ◽  
Przemyslaw Wojcik ◽  
Radoslaw Lisiecki ◽  
Yuriy Gerasymchuk ◽  
Wieslaw Strek ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Catalytic Reaction ◽  
Palladium Nanoparticles ◽  
Palladium Catalysts ◽  
Structural Changes ◽  
Boronic Acids ◽  
Size Distributions ◽  
Supported Palladium ◽  
Different Diameters

Three palladium catalysts supported on graphene oxide (GO) and on its composite with TiO2 (GO-TiO2) were prepared and characterized. The presence of Pd NPs of different diameters (4–89 nm) and size distributions was evidenced by TEM measurements. GO-supported palladium efficiently catalysed the carbonylative coupling of iodobenzenes with aryl boronic acids forming relevant diarylketones at 1 atm CO. The highest activity and recyclability were obtained for Pd/GO-TiO2. The emission behaviour of Pd/GO and Pd/GO-TiO2 catalysts indicated structural changes occurring during the catalytic reaction.

scholarly journals Green Synthesis of Reduced Graphene Oxide-Supported Palladium Nanoparticles by Coleus amboinicus and Its Enhanced Catalytic Efficiency and Antibacterial Activity

Crystals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 134
Author(s):  
Koduru Mallikarjuna ◽  
Lebaka Veeranjaneya Reddy ◽  
Sarah Al-Rasheed ◽  
Arifullah Mohammed ◽  
Sreedevi Gedi ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Palladium Nanoparticles ◽  
Catalytic Efficiency ◽  
Tem Analysis ◽  
Reduced Graphene ◽  
Supported Palladium ◽  
Medical Disciplines ◽  
Coleus Amboinicus

Novel reduced graphene oxide-supported palladium nanoparticles (RGO-PN) were synthesized under ultrasonication, a method that utilizes Coleus amboinicus as a bio-reduction agent. Green synthesized RGO-PN nanoparticles with a crystallite size in the range of 40–50 nm were confirmed in X-ray diffraction (XRD) spectra. RGO-PN show an absorption peak at 220 nm while reduced graphene oxide (RGO) shows its maximal absorbance at 210 nm. The scanning electron microscope image revealed that 40-nm-sized spherical-shaped palladium nanoparticles stick well to reduced graphene oxide sheets, which is consistent and correlated well with the XRD pattern. Moreover, a high-resolution morphological image of RGO-PN100 was obtained by TEM analysis, which shows the anchoring of palladium nanoparticles (PN) on RGO nanosheets. Green synthesized RGO-PN100 nanoparticles from Coleus amboinicus show better reduction kinetics for 4-nitrophenol at 40 min, suggesting that RGO-PN prepared from Coleus amboinicus serve as an excellent catalytic reducing agent. Furthermore, they show remarkable antibacterial activity against Escherichia coli (ATCC 25922). Thus, green synthesized RGO-supported palladium nanoparticles demonstrated that enhanced catalytic activity and antibacterial activity both play an important role in the environmental and medical disciplines.

Preparation and enhanced electrocatalytic activity of graphene supported palladium nanoparticles with multi-edges and corners

RSC Advances ◽  
2016 ◽  
Vol 6 (101) ◽  
pp. 98708-98716 ◽  
Author(s):  
Zhelin Liu ◽  
Yinghui Feng ◽  
Xiaofeng Wu ◽  
Keke Huang ◽  
Shouhua Feng ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Electrocatalytic Activity ◽  
Palladium Nanoparticles ◽  
Pd Nanoparticles ◽  
Reduced Graphene ◽  
Point Discharge ◽  
Supported Palladium ◽  
Activity Point

Pd nanoparticles with multi-edges and corners are prepared and assembled on reduced graphene oxide to examine the electrocatalytic activity. Point discharge is regarded to be capable of facilitating the electron transfer.

Microwave-assisted aqueous carbon–carbon cross-coupling reactions of aryl chlorides catalysed by reduced graphene oxide supported palladium nanoparticles

2020 ◽  
Vol 22 (10) ◽  
pp. 3239-3247 ◽  
Author(s):  
Qingxiao Zhang ◽  
Zhan Mao ◽  
Kaixuan Wang ◽  
Nam Thanh Son Phan ◽  
Fang Zhang
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Palladium Nanoparticles ◽  
Cross Coupling ◽  
Coupling Reactions ◽  
Aryl Chlorides ◽  
Microwave Assisted ◽  
Cross Coupling Reactions ◽  
Reduced Graphene ◽  
Supported Palladium

Microwave-assisted reduced graphene oxide supported palladium nanoparticles can efficiently promote aqueous Ullmann and Suzuki coupling reactions of aryl chlorides.

A novel magnetic palladium catalyst for the mild aerobic oxidation of 5-hydroxymethylfurfural into 2,5-furandicarboxylic acid in water

2015 ◽  
Vol 5 (6) ◽  
pp. 3194-3202 ◽  
Author(s):  
Nan Mei ◽  
Bing Liu ◽  
Judun Zheng ◽  
Kangle Lv ◽  
Dingguo Tang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Catalytic Activity ◽  
Palladium Catalyst ◽  
Palladium Nanoparticles ◽  
Aerobic Oxidation ◽  
High Catalytic Activity ◽  
Supported Palladium ◽  
Magnetically Separable ◽  
Furandicarboxylic Acid

Magnetically separable, graphene oxide-supported palladium nanoparticles showed high catalytic activity for the aerobic oxidation of 5-hydroxymethylfurfural into 2,5-furandicarboxylic acid.

Nano-structural changes of SnO2-supported palladium catalysts by redox treatments

2010 ◽  
Vol 379 (1-2) ◽  
pp. 148-154 ◽  
Author(s):  
Naoto Kamiuchi ◽  
Hiroki Muroyama ◽  
Toshiaki Matsui ◽  
Ryuji Kikuchi ◽  
Koichi Eguchi
Keyword(s):  
Palladium Catalysts ◽  
Structural Changes ◽  
Supported Palladium Catalysts ◽  
Supported Palladium
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