Designing oxygen bonding between reduced graphene oxide and multishelled Mn3O4 hollow spheres for enhanced performance of supercapacitors

2019 ◽  
Vol 7 (12) ◽  
pp. 6686-6694 ◽  
Author(s):  
Henan Jia ◽  
Zhaoyue Wang ◽  
Chun Li ◽  
Xiaoqing Si ◽  
Xiaohang Zheng ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Graphene Oxide ◽  
Transition Metal ◽  
Metal Oxides ◽  
Transition Metal Oxides ◽  
Fast Electron ◽  
Carbon Materials ◽  
Hollow Spheres ◽  
Chemical Bonds ◽  
Reduced Graphene

Strong chemical bonds between transition metal oxides and carbon materials which enable fast electron transfer kinetics are highly required in supercapacitor electrodes.

scholarly journals Transition Metal Oxides on Reduced Graphene Oxide Nanocomposites: Evaluation of Physicochemical Properties

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Vincenza Modafferi ◽  
Saveria Santangelo ◽  
Michele Fiore ◽  
Enza Fazio ◽  
Claudia Triolo ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Transition Metal ◽  
Metal Oxides ◽  
Reduced Graphene Oxide ◽  
Transition Metal Oxides ◽  
Photoelectron Spectroscopy ◽  
Rate Capability ◽  
Thermal Reduction ◽  
X Ray ◽  
Reduced Graphene

Transition metal oxides on reduced graphene oxide (TMO@rGO) nanocomposites were successfully prepared via a very simple one-step solvothermal process, involving the simultaneous (thermal) reduction of graphene oxide to graphene and the deposition of TMO nanoparticles over its surface. Texture and morphology, microstructure, and chemical and surface compositions of the nanocomposites were investigated via scanning electron microscopy, X-ray diffraction, micro-Raman spectroscopy, and X-ray photoelectron spectroscopy, respectively. The results prove that Fe2O3@rGO, CoFe2O4@rGO, and CoO@rGO are obtained by using Fe and/or Co acetates as oxide precursors, with the TMO nanoparticles uniformly anchored onto the surface of graphene sheets. The electrochemical performance of the most promising nanocomposite was evaluated as anode material for sodium ion batteries. The preliminary results of galvanostatic cycling prove that Fe2O3@rGO nanocomposite exhibits better rate capability and stability than both bare Fe2O3 and Fe2O3+rGO physical mixture.

scholarly journals CARBON FIBERS MODIFIED WITH TRANSITION METAL OXIDES FOR As(V) REMOVAL FROM SOLUTIONS

2018 ◽  
Vol 59 (9) ◽  
pp. 31
Author(s):  
Larisa A. Zemskova ◽  
Alexey V. Voit ◽  
Darya H. Shlyk ◽  
Nikolaiy N. Barinov
Keyword(s):  
Activated Carbon ◽  
Transition Metal ◽  
Metal Oxides ◽  
Manganese Oxide ◽  
Carbon Fibers ◽  
Transition Metal Oxides ◽  
Carbon Materials ◽  
Sorption Isotherms ◽  
Purification Of Water

Perspectives of use of activated carbon materials modified with transition metal oxides for purification of water from arsenic were considered. Sorption isotherms for two types of hybrid sorbents based on carbon fibers modified with manganese oxide as birnessite as well as on fiber and chitosan-carbon materials on its basic modified with molybdenum determining affinity of the sorbents to arsenate-ions are presented.

Metal‐Ion Coupled Electron Transfer Kinetics in Intercalation‐Based Transition Metal Oxides

2020 ◽  
Vol 10 (22) ◽  
pp. 1903933 ◽  
Author(s):  
Victoria A. Nikitina ◽  
Sergey Y. Vassiliev ◽  
Keith J. Stevenson
Keyword(s):  
Electron Transfer ◽  
Transition Metal ◽  
Metal Oxides ◽  
Transition Metal Oxides ◽  
Metal Ion ◽  
Electron Transfer Kinetics

Mesoporous Mn2O3/reduced graphene oxide (rGO) composite with enhanced electrochemical performance for Li-ion battery

2017 ◽  
Vol 46 (30) ◽  
pp. 9777-9783 ◽  
Author(s):  
Harsharaj S. Jadhav ◽  
Gaurav M. Thorat ◽  
Bharat B. Kale ◽  
Jeong Gil Seo
Keyword(s):  
Graphene Oxide ◽  
Energy Storage ◽  
Electrochemical Performance ◽  
Metal Oxides ◽  
Transition Metal Oxides ◽  
Low Cost ◽  
Li Ion Battery ◽  
Reduced Graphene ◽  
Li Ion ◽  
Enhanced Electrochemical Performance

Transition metal oxides are the most promising candidates in low-cost and eco-friendly energy storage/conversion applications.

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