scholarly journals Experimental and DFT studies of gadolinium decorated graphene oxide materials for their redox properties and as a corrosion inhibition barrier layer on Mg AZ13 alloy in a 3.5% NaCl environment

RSC Advances ◽  
2021 ◽  
Vol 11 (36) ◽  
pp. 22095-22105
Author(s):  
Palaniappan N. ◽  
Ivan S. Cole ◽  
A. Kuznetsov ◽  
K. R. Justin Thomas ◽  
Balasubramanian K. ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Graphene Oxide ◽  
Corrosion Inhibition ◽  
Barrier Layer ◽  
Corrosive Medium ◽  
Epoxy Group ◽  
Redox Properties ◽  
Alloy Surface ◽  
Oxide Materials ◽  
Dft Studies

Gadolinium electrostatically interacts with the epoxy group of graphene oxide. Non-bonding electrons of graphene oxide enhance electron transfer between the polarized metal alloy surface and product alloy surface from the corrosive medium.

scholarly journals Experimental and DFT studies of carbon nanotubes covalently functionalized with an imidazole derivative for electrochemical stability and green corrosion inhibition as a barrier layer on the nickel alloy surface in a sulphuric acidic medium

RSC Advances ◽  
2019 ◽  
Vol 9 (66) ◽  
pp. 38677-38686
Author(s):  
Palaniappan N. ◽  
I. S. Cole ◽  
A. E. Kuznetsov ◽  
K. R. Justin Thomas
Keyword(s):  
Carbon Nanotubes ◽  
Nickel Alloy ◽  
Electrostatic Interaction ◽  
Barrier Layer ◽  
Carbon Material ◽  
Acidic Medium ◽  
Electrochemical Stability ◽  
Alloy Surface ◽  
Nickel Surface ◽  
Dft Studies

(A) The electrostatic interaction of a functionalized carbon material with a 111 nickel surface, (B) the OPT structure of 4,5-DPM + CNT, and (C) 4,5-DPIM + CNT material chemisorbed on a 111 nickel alloy surface.

scholarly journals Neodymium-decorated graphene oxide as a corrosion barrier layer on Ti6Al4V alloy in acidic medium

RSC Advances ◽  
2019 ◽  
Vol 9 (15) ◽  
pp. 8537-8545 ◽  
Author(s):  
N. Palaniappan ◽  
I. S. Cole ◽  
F. Caballero-Briones ◽  
S. Manickam ◽  
C. Lal ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Corrosion Inhibition ◽  
Barrier Layer ◽  
Acidic Medium ◽  
Ti6al4v Alloy ◽  
Acidic Media ◽  
Corrosion Barrier

Neodymium-decorated graphene oxide is chemisorbed by non-bonding electrons on Ti6Al4V surface increasing the corrosion inhibition in acidic media.

scholarly journals Experimental and DFT studies of porous carbon covalently functionalized by polyaniline as a corrosion inhibition barrier on nickel-based alloys in acidic media

RSC Advances ◽  
2020 ◽  
Vol 10 (21) ◽  
pp. 12151-12165 ◽  
Author(s):  
N. Palaniappan ◽  
I. S. Cole ◽  
K. Damodaran ◽  
A. Kuznetsov ◽  
K. R. Justin Thomas ◽  
...  
Keyword(s):  
Nickel Alloy ◽  
Corrosion Inhibition ◽  
Porous Carbon ◽  
Free Electron ◽  
Alloy Surface ◽  
Fish Scale ◽  
Dft Studies ◽  
Acidic Media

Polyaniline functionalized fish scale carbon chemisorption on 111 nickel alloy surface by polyaniline polaron nitrogen free electron.

scholarly journals Low Surface Roughness Graphene Oxide Film Reduced with Aluminum Film Deposited by Magnetron Sputtering

Nanomaterials ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1428
Author(s):  
Xiaowei Fan ◽  
Xuguo Huai ◽  
Jie Wang ◽  
Li-Chao Jing ◽  
Tao Wang ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Electron Transfer ◽  
Graphene Oxide ◽  
Magnetron Sputtering ◽  
Chemical Reduction ◽  
Graphene Film ◽  
Conductivity Measurement ◽  
Electrical Conductivity Measurement ◽  
Vis Spectroscopy ◽  
Hcl Solution

Graphene film has wide applications in optoelectronic and photovoltaic devices. A novel and facile method was reported for the reduction of graphene oxide (GO) film by electron transfer and nascent hydrogen produced between aluminum (Al) film deposited by magnetron sputtering and hydrochloric acid (HCl) solution for only 5 min, significantly shorter than by other chemical reduction methods. The thickness of Al film was controlled utilizing a metal detection sensor. The effect of the thickness of Al film and the concentration of HCl solution during the reduction was explored. The optimal thickness of Al film was obtained by UV-Vis spectroscopy and electrical conductivity measurement of reduced GO film. Atomic force microscope images could show the continuous film clearly, which resulted from the overlap of GO flakes, the film had a relatively flat surface morphology, and the surface roughness reduced from 7.68 to 3.13 nm after the Al reduction. The film sheet resistance can be obviously reduced, and it reached 9.38 kΩ/sq with a high transmittance of 80% (at 550 nm). The mechanism of the GO film reduction by electron transfer and nascent hydrogen during the procedure was also proposed and analyzed.

Synthesis and Characterization of Reduced Graphene Oxide

2013 ◽  
Vol 678 ◽  
pp. 56-60 ◽  
Author(s):  
Cherukutty Ramakrishnan Minitha ◽  
Ramasamy Thangavelu Rajendrakumar
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Graphite Oxide ◽  
High Performance ◽  
Structural Changes ◽  
Epoxy Group ◽  
Xrd Analysis ◽  
Si Substrates ◽  
Reduced Graphene ◽  
Reduced Graphite Oxide

Reduced graphene oxide is an excellent candidate for various electronic devices such as high performance gas sensors. In this work Graphene oxide was prepared by oxidizing graphite to form graphite oxide. From XRD analysis the peak around 11.5o confirmed that the oxygen was intercalated into graphite. By using hydrazine hydrate, the epoxy group in graphite oxide was reduced then the solution of reduced graphite oxide (rGO) is exfoliated. Raman spectrum of rGO contains both G band (1580 cm-1), D band (1350 cm-1). The remarkable structural changes reveals that reduction of graphene oxide from the values of ID/IG ratio that increase from 0.727 (GO) to 1.414 (rGO). The exfoliated reduced graphite oxide solution is spin coated on to the SiO2/Si substrates.

scholarly journals Facile synthesis of Tb-decorated graphene oxide: electrochemical stability, hydrogen storage, and corrosion inhibition of Mg AZ13 alloy in 3.5% NaCl medium

RSC Advances ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 662-670
Author(s):  
Palaniappan Nagarajan ◽  
Ivan S. Cole ◽  
Aleksey Kuznetsov ◽  
Sivakumar Manickam
Keyword(s):  
Graphene Oxide ◽  
Hydrogen Storage ◽  
Corrosion Inhibition ◽  
Electrochemical Stability ◽  
Functionalized Graphene ◽  
Facile Synthesis ◽  
Functionalized Graphene Oxide

Terbium functionalized graphene oxide interacted with an Mg2+ surface by the active side of GO.

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.

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