Synergetic effect of C and Ni on hydrogen release from Mg-Ni-electrochemically synthesized reduced graphene oxide based hydride†

2021 ◽  
Author(s):  
Srikanta Panda ◽  
Satya Aditya V V Marla ◽  
Sankara Sarma V Tatiparti
Keyword(s):  
Graphene Oxide ◽  
Ball Milling ◽  
Reduced Graphene Oxide ◽  
Synergetic Effect ◽  
Hydrogen Release ◽  
Reduced Graphene

Mg-reduced graphene oxide (rGO), Mg-Ni and Mg-Ni-rGO nanocomposites were synthesized by ball milling. They were subsequently hydrogenated at PH2 ≈ 15 bar, ~320 ℃. Isothermal (~320 ℃) and non-isothermal (room...

scholarly journals Nano-inclusion in one step: spontaneous ice-templating of porous hierarchical nanocomposites for selective hydrogen release

2019 ◽  
Vol 3 (2) ◽  
pp. 396-400 ◽  
Author(s):  
Simon Champet ◽  
Jan van den Berg ◽  
Robert Szczesny ◽  
Agata Godula-Jopek ◽  
Duncan H. Gregory
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Ammonia Borane ◽  
Onset Temperature ◽  
Hydrogen Release ◽  
Aqueous Suspensions ◽  
Reduced Graphene ◽  
One Step ◽  
Ice Templating

3-D nanocomposites of (reduced) graphene oxide and ammonia borane can be fabricated in a one-step ice templating process from aqueous suspensions. The nanocomposites release hydrogen at a reduced onset temperature, suppressing the release of diborane, borazine and ammonia.

scholarly journals Green synthesis of reduced graphene oxide using ball milling

2017 ◽  
Vol 21 ◽  
pp. 93-97 ◽  
Author(s):  
G. Calderon-Ayala ◽  
M. Cortez-Valadez ◽  
P.G. Mani-Gonzalez ◽  
R. Britto Hurtado ◽  
J.I. Contreras-Rascon ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Green Synthesis ◽  
Ball Milling ◽  
Reduced Graphene Oxide ◽  
Reduced Graphene

Nonenzymatic Electrochemical Immunosensor Using Ferroferric Oxide–Manganese Dioxide–Reduced Graphene Oxide Nanocomposite as Label for α-Fetoprotein Detection

NANO ◽  
2016 ◽  
Vol 11 (10) ◽  
pp. 1650116 ◽  
Author(s):  
Wensi Jian ◽  
Chunping Wang ◽  
Zuanguang Chen ◽  
Yanyan Yu ◽  
Duanping Sun ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Manganese Dioxide ◽  
Reduced Graphene Oxide ◽  
Photoelectron Spectroscopy ◽  
Low Cost ◽  
Synergetic Effect ◽  
Electrochemical Immunosensor ◽  
Quantitative Detection ◽  
Ferroferric Oxide ◽  
Reduced Graphene

A novel nonenzymatic electrochemical immunosensor was fabricated for quantitative detection of [Formula: see text]-fetoprotein (AFP). The immunosensor was constructed by modifying gold electrode with electrochemical reduction of graphene oxide-carboxyl multi-walled carbon nanotube composites (ERGO–CMWCNTs) and electrodeposition of gold nanoparticles (AuNPs) for effective immobilization of primary antibody (Ab[Formula: see text]. Ferroferric oxide–manganese dioxide–reduced graphene oxide nanocomposites (Fe3O4@MnO2–rGO) were designed as labels for signal amplification. On one hand, the excellent electroconductivity and outstanding electron transfer capability of ERGO–CMWCNTs/AuNPs improved the sensitivity of the immunosensor. On the other hand, introduction of rGO could not only increase the specific surface area for immobilization of secondary antibody (Ab[Formula: see text] but also build a synergetic effect to reinforce the electrocatalytic properties of catalysts. Fe3O4@MnO2–rGO nanocomposites were characterized by scanning electron microscope, Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. Using AFP as a model analyte, the proposed sandwich-type electrochemical immunosensor exhibited a wide linear range of 0.01–50[Formula: see text][Formula: see text] with a low detection limit of 5.8[Formula: see text][Formula: see text]. Moreover, the Fe3O4@MnO2–rGO-based peroxidase mimetic system displayed an excellent analytical performance with low cost, satisfactory reproducibility and high selectivity, which could be further extended for detecting other disease-related biomarkers.

scholarly journals Ternary nanocomposites of reduced graphene oxide, polyaniline and hexaniobate: hierarchical architecture and high polaron formation

2018 ◽  
Vol 9 ◽  
pp. 2936-2946 ◽  
Author(s):  
Claudio H B Silva ◽  
Maria Iliut ◽  
Christopher Muryn ◽  
Christian Berger ◽  
Zachary Coldrick ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Conformational Changes ◽  
Synergistic Effects ◽  
Synergetic Effect ◽  
Hierarchical Architecture ◽  
Polymer Backbone ◽  
Neat Polymer ◽  
Cooperative Effects ◽  
Reduced Graphene

Nanostructured systems, such as nanocomposites, are potential materials for usage in different fields since synergistic effects of their components at the nanoscale domain may improve physical/chemical properties when compared to individual phases. We report here the preparation and characterisation of a new nanocomposite composed of polyaniline (PANI), reduced graphene oxide (rGO) and hexaniobate (hexNb) nanoscrolls. Atomic force microscopy images show an interesting architecture of rGO flakes coated with PANI and decorated by hexNb. Such features are attributed to the high stability of the rGO flakes prepared at room temperature. Detailed characterisation by X-ray photoelectron and Raman spectroscopies indicates an intermediate reduction degree for the rGO component and high doping degree of the PANI chains compared to the neat polymer. The latter feature can be attributed to cooperative effects of PANI chains with rGO flakes and hexNb nanoscrolls, which promote conformational changes of the polymer backbone (secondary doping). Spectroscopic and electrochemistry data indicate a synergetic effect on the ternary nanocomposite, which is attributed to interactions between the components resulting from the morphological aspects. Therefore, the new nanocomposite presents promising properties for development of new materials in the film form on substrates for sensing or corrosion protection for example.

Enhanced hydrogen release of metal borohydrides M(BH4)n (M = Li, Na, Mg, Ca) mixed with reduced graphene oxide

2016 ◽  
Vol 41 (26) ◽  
pp. 11225-11231 ◽  
Author(s):  
Angeloclaudio Nale ◽  
Flavio Pendolino ◽  
Amedeo Maddalena ◽  
Paolo Colombo
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Hydrogen Release ◽  
Reduced Graphene
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