Bandgap engineering through nanocrystalline magnetic alloy grafting on reduced graphene oxide

2014 ◽  
Vol 16 (36) ◽  
pp. 19661-19667 ◽  
Author(s):  
D. De ◽  
M. Chakraborty ◽  
S. Majumdar ◽  
S. Giri
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Hybrid Materials ◽  
Magnetic Alloy ◽  
Bandgap Engineering ◽  
Reduced Graphene ◽  
Large Moment

Grafting of nanocrystalline Co80Ni20on reduced graphene oxide causes a significantly large moment (1.2μB), ∼10 times localization of conductivity and significant magnetoconductance of hybrid-materials, which is promising toward spintronic applications.

Catalyst-free synthesis of reduced graphene oxide–carbon nanotube hybrid materials by acetylene-assisted annealing graphene oxide

2012 ◽  
Vol 101 (12) ◽  
pp. 123107 ◽  
Author(s):  
Fuchi Liu ◽  
Ming Li ◽  
Qian Feng ◽  
Nujiang Tang ◽  
Wei Zhong ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Carbon Nanotube ◽  
Reduced Graphene Oxide ◽  
Hybrid Materials ◽  
Catalyst Free ◽  
Reduced Graphene

scholarly journals Synthesis of Polypyrrole/Reduced Graphene Oxide Hybrids via Hydrothermal Treatment for Energy Storage Applications

Materials ◽  
2020 ◽  
Vol 13 (10) ◽  
pp. 2273 ◽  
Author(s):  
Adam Moyseowicz ◽  
Krzysztof Pająk ◽  
Katarzyna Gajewska ◽  
Grażyna Gryglewicz
Keyword(s):  
Graphene Oxide ◽  
Chemical Composition ◽  
Electrochemical Properties ◽  
Reduced Graphene Oxide ◽  
Hydrothermal Treatment ◽  
Hybrid Materials ◽  
Electrode Materials ◽  
Conductive Polymer ◽  
Surface Areas ◽  
Reduced Graphene

Herein, we propose hydrothermal treatment as a facile and environmentally friendly approach for the synthesis of polypyrrole/reduced graphene oxide hybrids. A series of self-assembled hybrid materials with different component mass ratios of conductive polymer to graphene oxide was prepared. The morphology, porous structure, chemical composition and electrochemical performance of the synthesized hybrids as electrode materials for supercapacitors were investigated. Nitrogen sorption analysis at 77 K revealed significant changes in the textural development of the synthesized materials, presenting specific surface areas ranging from 25 to 199 m2 g−1. The combination of the pseudocapacitive polypyrrole and robust graphene material resulted in hybrids with excellent electrochemical properties, which achieved specific capacitances as high as 198 F g−1 at a current density of 20 A g−1 and retained up to 92% of their initial capacitance after 3000 charge–discharge cycles. We found that a suitable morphology and chemical composition are key factors that determine the electrochemical properties of polypyrrole/reduced graphene oxide hybrid materials.

scholarly journals Thermostability, Photoluminescence, and Electrical Properties of Reduced Graphene Oxide–Carbon Nanotube Hybrid Materials

Crystals ◽  
2013 ◽  
Vol 3 (1) ◽  
pp. 28-37 ◽  
Author(s):  
Fuchi Liu ◽  
Yong Cao ◽  
Mingdong Yi ◽  
Linghai Xie ◽  
Wei Huang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Carbon Nanotube ◽  
Electrical Properties ◽  
Reduced Graphene Oxide ◽  
Hybrid Materials ◽  
Reduced Graphene

A general one-pot synthetic strategy to reduced graphene oxide (rGO) and rGO-nanoparticle hybrid materials

Carbon ◽  
2019 ◽  
Vol 143 ◽  
pp. 73-84 ◽  
Author(s):  
Rebecca F. Albers ◽  
Rafael A. Bini ◽  
João B. Souza ◽  
Derik T. Machado ◽  
Laudemir C. Varanda
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Hybrid Materials ◽  
One Pot ◽  
Synthetic Strategy ◽  
Reduced Graphene

Synthesis and Characterization of Zinc Oxide-Reduced Graphene Oxide Hybrid Materials and their Application for Nitrogen Dioxide Detection

2020 ◽  
Vol 302 ◽  
pp. 45-50
Author(s):  
Worawut Muangrat ◽  
Thanawee Chodjarusawad ◽  
Akapong Suwattanamala ◽  
Chaisak Issro
Keyword(s):  
Electron Microscopy ◽  
Zinc Oxide ◽  
Graphene Oxide ◽  
Nitrogen Dioxide ◽  
Reduced Graphene Oxide ◽  
Hybrid Materials ◽  
Graphite Powder ◽  
Ethanol Solution ◽  
Step Method ◽  
Reduced Graphene

Herein, we report a facile synthesis of zinc oxide-reduced graphene oxide (ZnO-rGO) hybrid materials by two-step method. Firstly, rGO was synthesized by using graphite powder mixed with sodium nitrate, sulfuric acid and potassium permanganate via Hummers method. Synthesized rGO were dispersed in ethanol by ultra-sonication for a designated time period. Then, zinc oxide (ZnO) powder was added into rGO-ethanol solution and transferred into Teflon-lined stainless steel autoclave. The ZnO-rGO was produced by hydrothermal method at 180 °C for 120 and 180 min (here after referred to as ZnO(120)-rGO and ZnO(180)-rGO, respectively). The morphological and crystalline structures of synthesized rGO and ZnO-rGO were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray diffraction (XRD). Synthesized ZnO-rGO was exposed to 100 parts per million (ppm) nitrogen dioxide (NO2) gas at room temperature, 50 °C and 75 °C for testing its sensing performance. The results show that ZnO(180)-rGO hybrid materials exhibit high response to NO2 gas at 50 °C and 75 °C. The electrical resistance of ZnO-rGO sensors decreased when the sensors responded to NO2 gas, indicating a p-type behavior. Moreover, the ZnO-rGO hybrid materials can detect 100 ppm NO2 gas with an operating temperature limit at 50 °C. The results imply that synthesized ZnO-rGO hybrid materials could be used as gas sensing device for ppm-level NO2 detection at low temperature and consume low power.

scholarly journals Hybrid materials of ZnO nanostructures with reduced graphene oxide and gold nanoparticles: enhanced photodegradation rates in relation to their composition and morphology

2016 ◽  
Vol 18 (3) ◽  
pp. 1478-1486 ◽  
Author(s):  
K. Bramhaiah ◽  
Vidya N. Singh ◽  
Neena S. John
Keyword(s):  
Gold Nanoparticles ◽  
Graphene Oxide ◽  
Adsorption Capacity ◽  
Reduced Graphene Oxide ◽  
Hybrid Materials ◽  
Ternary Systems ◽  
Zno Nanostructures ◽  
Reduced Graphene ◽  
Binary And Ternary Systems

Binary and ternary systems of rGO, Au and ZnO with nanoparticle and nanorod morphologies are explored as photocatalysts and their photodegradation performance in relation to adsorption capacity and photoluminescence is presented.

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