Bimetallic-metal oxide nanoparticles of Pt-M (M: W, Mo, and V) supported on reduced graphene oxide (rGO): radiolytic synthesis and methanol oxidation electrocatalysis

2020 ◽  
Author(s):  
Shohreh Kianfar ◽  
Ahamd Nozad Golikand ◽  
Bahman ZareNezhad
Keyword(s):  
Graphene Oxide ◽  
Metal Oxide ◽  
Reduced Graphene Oxide ◽  
Methanol Oxidation ◽  
Metal Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Reduced Graphene ◽  
Radiolytic Synthesis

scholarly journals Reduced graphene oxide and inorganic nanoparticles composites – synthesis and characterization

2015 ◽  
Vol 17 (4) ◽  
pp. 95-103 ◽  
Author(s):  
Magdalena Onyszko ◽  
Karolina Urbas ◽  
Malgorzata Aleksandrzak ◽  
Ewa Mijowska
Keyword(s):  
Graphene Oxide ◽  
Metal Oxide ◽  
Reduced Graphene Oxide ◽  
Zirconium Dioxide ◽  
Water Solution ◽  
Metal Oxide Nanoparticles ◽  
Direct Synthesis ◽  
Inorganic Nanoparticles ◽  
Oxide Nanoparticles ◽  
Reduced Graphene

Abstract Graphene – novel 2D material, which possesses variety of fascinating properties, can be considered as a convenient support material for the nanoparticles. In this work various methods of synthesis of reduced graphene oxide with metal or metal oxide nanoparticles will be presented. The hydrothermal approach for deposition of platinum, palladium and zirconium dioxide nanoparticles in ethylene glycol/water solution was applied. Here, platinum/reduced graphene oxide (Pt/RGO), palladium/reduced graphene oxide (Pd/RGO) and zirconium dioxide/reduced graphene oxide (ZrO2/RGO) nanocomposites were prepared. Additionally, manganese dioxide/reduced graphene oxide nanocomposite (MnO2/RGO) was synthesized in an oleic-water interface. The obtained nanocomposites were investigated by transmission electron microscopy (TEM), X-ray diffraction analysis (XRD), Raman spectroscopy and thermogravimetric analysis (TGA). The results shows that GO can be successfully used as a template for direct synthesis of metal or metal oxide nanoparticles on its surface with a homogenous distribution.

scholarly journals General Synthesis of Ultrafine Metal Oxide/Reduced Graphene Oxide Nanocomposites for Ultrahigh-Flux Nanofiltration Membrane

2021 ◽  
Author(s):  
Wanyu Zhang ◽  
Hai Xu ◽  
Fei Xie ◽  
Xiaohua Ma ◽  
Bo Niu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Metal Oxide ◽  
Reduced Graphene Oxide ◽  
Active Sites ◽  
Metal Oxide Nanoparticles ◽  
Water Flux ◽  
Size Exclusion ◽  
Colloidal Solutions ◽  
Ultrafine Metal ◽  
Reduced Graphene

Abstract Graphene-based membranes have great potential to revolutionize nanofiltration technology, but achieving high solute rejections at high water flux remains extremely challenging. Herein, a family of ultrafine metal oxide/reduced graphene oxide (rGO) nanocomposites are synthesized through a heterogenous nucleation and diffusion-controlled growth process for dye nanofiltration. The synthesis is based on the utilization of oxygen functional groups on GO surface as preferential active sites for heterogeneous nucleation, leading to the formation of sub-3nm size, monodispersing as well as high-density loading of metal oxide nanoparticles. The anchored ultrafine nanoparticles could inhibit the wrinkling of the rGO nanosheet, forming highly stable colloidal solutions for solution-processing fabrication of nanofiltration membranes. By functioning as pillars, the nanoparticles remarkably increase both vertical interlayer spacing and lateral tortuous paths of the rGO membranes, offering an unprecedented water permeability of 225 L m− 2 h− 1 bar − 1 and a high selectivity up to 98% in the size-exclusion separation of methyl blue.

scholarly journals Porous reduced graphene oxide (rGO)/WO3 nanocomposites for the enhanced detection of NH3 at room temperature

2019 ◽  
Vol 1 (5) ◽  
pp. 1799-1811 ◽  
Author(s):  
G. Jeevitha ◽  
R. Abhinayaa ◽  
D. Mangalaraj ◽  
N. Ponpandian ◽  
P. Meena ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Pore Size ◽  
Reduced Graphene Oxide ◽  
Room Temperature ◽  
Gas Sensing ◽  
Metal Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Reduced Graphene ◽  
Gas Sensing Properties ◽  
Semiconducting Metal Oxide

Incorporation of reduced graphene oxide (rGO) modifies the properties of semiconducting metal oxide nanoparticles and makes it possible to tune the surface area and pore size to optimum values, which in turn improves their gas sensing properties.

Viscoelastic behavior of suspensions of reduced graphene oxide nanoparticles in epoxy

2021 ◽  
Vol 119 (4) ◽  
pp. 041901
Author(s):  
M. Majidian ◽  
A. Magrez ◽  
L. Forró ◽  
Y. Leterrier
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Viscoelastic Behavior ◽  
Oxide Nanoparticles ◽  
Reduced Graphene
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