Graphene oxide supported copper coordinated amino acids as novel heterogeneous catalysts for epoxidation of norbornene

2017 ◽  
Vol 92 ◽  
pp. 109-113 ◽  
Author(s):  
Shadpour Mallakpour ◽  
Amir Abdolmaleki ◽  
Azam Karshenas
Keyword(s):  
Amino Acids ◽  
Graphene Oxide ◽  
Heterogeneous Catalysts

Layered graphene oxide membranes functioned by amino acids for efficient separation of metal ions

2021 ◽  
Vol 546 ◽  
pp. 149145
Author(s):  
Bo Zheng ◽  
Xianxian Chu ◽  
Han Li ◽  
Xiuli Wu ◽  
Xin Zhao ◽  
...  
Keyword(s):  
Amino Acids ◽  
Graphene Oxide ◽  
Metal Ions ◽  
Separation Of Metal Ions ◽  
Efficient Separation ◽  
Oxide Membranes ◽  
Graphene Oxide Membranes

Bulky α-diimine palladium complexes supported graphene oxide as heterogeneous catalysts for Suzuki-Miyaura reaction

2020 ◽  
Vol 1218 ◽  
pp. 128537
Author(s):  
Ning Liu ◽  
NiNa Qiao ◽  
Feng-Shou Liu ◽  
ShaoHua Wang ◽  
Ying Liang
Keyword(s):  
Graphene Oxide ◽  
Heterogeneous Catalysts ◽  
Palladium Complexes

Designing versatile heterogeneous catalysts based on Ag and Au nanoparticles decorated on chitosan functionalized graphene oxide

2015 ◽  
Vol 17 (17) ◽  
pp. 11329-11340 ◽  
Author(s):  
Rajendiran Rajesh ◽  
E. Sujanthi ◽  
S. Senthil Kumar ◽  
Rengarajan Venkatesan
Keyword(s):  
Graphene Oxide ◽  
Catalytic Activity ◽  
Heterogeneous Catalysts ◽  
Au Nanoparticles ◽  
Dye Degradation ◽  
Functionalized Graphene ◽  
Functionalized Graphene Oxide

Nanocatalysts based on Ag and AuNPs stabilized over chitosan functionalized GO exhibited excellent catalytic activity towards reduction of nitroarenes and dye degradation.

scholarly journals Amino Acid Cross-Linked Graphene Oxide Membranes for Metal Ions Permeation, Insertion and Antibacterial Properties

Membranes ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 296 ◽  
Author(s):  
Lijuan Qian ◽  
Haijing Wang ◽  
Jingyi Yang ◽  
Xiaolei Chen ◽  
Xue Chang ◽  
...  
Keyword(s):  
Amino Acids ◽  
Graphene Oxide ◽  
Metal Ions ◽  
Water Flux ◽  
Antibacterial Properties ◽  
Earth Metal ◽  
Composite Membranes ◽  
Interlayer Spacing ◽  
Nylon Membrane ◽  
Alkaline Earth Metal Ions

Graphene oxide (GO) and its composite membranes have exhibited great potential for application in water purification and desalination. This article reports that a novel graphene oxide membrane (GOM) of ~5 µm thickness was fabricated onto a nylon membrane by vacuum filtration and cross-linked by amino acids (L-alanine, L-phenylalanine, and serine). The GOM cross-linked by amino acids (GOM-A) exhibits excellent stability, high water flux, and high rejection to metal ions. The rejection coefficients to alkali and alkaline earth metal ions through GOM-A were over 94% and 96%, respectively. The rejection coefficients decreased with an increasing H+ concentration. Metal ions (K+, Ca2+, and Fe3+) can be inserted into GOM-A layers, which enlarges the interlayer spacing of GOM-A and neutralizes the electronegativity of the membrane, resulting in the decease in the rejection coefficients to metal ions. Meanwhile, GOM-A showed quite high antibacterial efficiency against E. coli. With the excellent performance as described above, GOM-A could be used to purify and desalt water.

scholarly journals New Sustainable Approach for the Production of Fe3O4/Graphene Oxide-Activated Persulfate System for Dye Removal in Real Wastewater

Water ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 733 ◽  
Author(s):  
Md. Nahid Pervez ◽  
Wei He ◽  
Tiziano Zarra ◽  
Vincenzo Naddeo ◽  
Yaping Zhao
Keyword(s):  
Graphene Oxide ◽  
Heterogeneous Catalysts ◽  
Degradation Mechanism ◽  
Operational Parameters ◽  
Solution Ph ◽  
Dye Pollutants ◽  
Water Purification System ◽  
Purification System ◽  
Real Wastewater ◽  
Activated Persulfate

Persulfate (PS)-activated, iron-based heterogeneous catalysts have attracted significant attention as a potential advanced and sustainable water purification system. Herein, a novel Fe3O4 impregnated graphene oxide (Fe3O4@GO)-activated persulfate system (Fe3O4@GO+K2S2O8) was synthesized by following a sustainable protocol and was tested on real wastewater containing dye pollutants. In the presence of the PS-activated system, the degradation efficiency of Rhodamine B (RhB) was significantly increased to a level of ≈95% compared with that of Fe3O4 (≈25%). The influences of different operational parameters, including solution pH, persulfate dosage, and RhB concentration, were systemically evaluated. This system maintained its catalytic activity and durability with a negligible amount of iron leached during successive recirculation experiments. The degradation intermediates were further identified through reactive oxygen species (ROS) studies, where surface-bound SO4− was found to be dominant radical for RhB degradation. Moreover, the degradation mechanism of RhB in the Fe3O4@GO+K2S2O8 system was discussed. Finally, the results indicate that the persulfate-activated Fe3O4@GO catalyst provided an effective pathway for the degradation of dye pollutants in real wastewater treatment.

Trends of amino acid adsorption onto graphene and graphene oxide surfaces: a dispersion corrected DFT study

RSC Advances ◽  
2015 ◽  
Vol 5 (113) ◽  
pp. 92843-92857 ◽  
Author(s):  
H. Tavassoli Larijani ◽  
M. Darvish Ganji ◽  
M. Jahanshahi
Keyword(s):  
Amino Acids ◽  
Graphene Oxide ◽  
Amino Acid ◽  
Adsorption Properties ◽  
Dft Study ◽  
Oxide Surfaces ◽  
First Principle ◽  
First Principle Calculations

First-principle calculations based on DFT were performed to investigate the adsorption properties of amino acids onto graphene surfaces.

Application of Bimetallic and Trimetallic Nanoparticles Supported on Graphene as novel Heterogeneous Catalysts in the Reduction of Nitroarenes, Homo-coupling, Suzuki-Miyaura and Sonogashira Reactions

2020 ◽  
Vol 24 (19) ◽  
pp. 2216-2234
Author(s):  
Seyede Mahdiye Hoseini Chopani ◽  
Shima Asadi ◽  
Majid M. Heravi
Keyword(s):  
Graphene Oxide ◽  
Metal Nanoparticles ◽  
Heterogeneous Catalysts ◽  
Bimetallic Nanoparticles ◽  
Solid Surfaces ◽  
Coupling Reactions ◽  
Chemical Transformations ◽  
Organic Transformations ◽  
Conductive Surface ◽  
Sonogashira Reactions

In the last decade, the use of heterogeneous catalysts based on Metal Nanoparticles (MNPs) has attracted increasing attention due to their prominence as nanocatalysts in several key chemical transformations. Notably, it is well identified that supporting Metal Nanoparticles (MNPs) with suitable solid surfaces can protect the MNPs from leaching, deactivation, and also increasing its ease of separation and possible reusability. Graphene oxide (GO) as a conductive surface could have non-covalent bonding interactions like hydrogen bonding, electrostatic and π –π* stacking interactions with substrate leading to activation of the substrate. Remarkably, it is recognized that bimetallic nanoparticles supported on graphene oxide often show novel properties that are not present on either of the parent metal or surfaces. In this review, we tried to reveal the potential advantages of bimetallic and trimetallic nanoparticles supported on graphene oxide in organic transformations, including the reduction of nitroarenes, Suzuki-Miyaura and Sonogashira coupling reactions.

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