scholarly journals Polymer-assisted synthesis and applications of hydroxyapatite (HAp) anchored nitrogen-doped 3D graphene foam-based nanostructured ceramic framework

RSC Advances ◽  
2020 ◽  
Vol 10 (30) ◽  
pp. 17918-17929 ◽  
Author(s):  
Murugesan Manoj ◽  
Jinbo Song ◽  
Wenjian Zhu ◽  
Hu Zhou ◽  
Junhao Zhang ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Graphene Foam ◽  
3D Graphene ◽  
Nitrogen Doped ◽  
Solvothermal Route ◽  
Nanostructured Ceramic

Hydroxyapatite anchored nitrogen-doped three-dimensional graphene (HAp-N3DG) skeletal network (foam) based nanostructured ceramic framework (CF) was developed through a polymer-assisted solvothermal route.

Three dimensional (3D) flexible graphene foam/polypyrrole composite: towards highly efficient supercapacitors

RSC Advances ◽  
2015 ◽  
Vol 5 (6) ◽  
pp. 3999-4008 ◽  
Author(s):  
Sakineh Chabi ◽  
Chuang Peng ◽  
Zhuxian Yang ◽  
Yongde Xia ◽  
Yanqiu Zhu
Keyword(s):  
Electrochemical Performance ◽  
Three Dimensional ◽  
Graphene Foam ◽  
3D Graphene ◽  
3 Dimensional ◽  
Highly Efficient ◽  
Polypyrrole Composite

Polypyrrole (PPY) functionalized 3 dimensional (3D) graphene foam (GF) with remarkable electrochemical performance has been synthesized in this work.

scholarly journals Nitrogen Functionalization of CVD Grown Three-Dimensional Graphene Foam for Hydrogen Evolution Reactions in Alkaline Media

Materials ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 4952
Author(s):  
Daniela Ion-Ebrașu ◽  
Radu Dorin Andrei ◽  
Stanică Enache ◽  
Simona Căprărescu ◽  
Constantin Cătălin Negrilă ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Photoelectron Spectroscopy ◽  
Hydrothermal Process ◽  
Three Dimensional ◽  
Chemical Vapor ◽  
Alkaline Media ◽  
Active Nitrogen ◽  
Graphene Foam ◽  
Graphene Layers ◽  
Nitrogen Doped

Three-dimensional graphene foam (3D-GrFoam) is a highly porous structure and sustained lattice formed by graphene layers with sp2 and sp3 hybridized carbon. In this work, chemical vapor deposition (CVD)—grown 3D-GrFoam was nitrogen-doped and platinum functionalized using hydrothermal treatment with different reducing agents (i.e., urea, hydrazine, ammonia, and dihydrogen hexachloroplatinate (IV) hydrate, respectively). X-ray photoelectron spectroscopy (XPS) survey showed that the most electrochemically active nitrogen-doped sample (GrFoam3N) contained 1.8 at % of N, and it exhibited a 172 mV dec−1 Tafel plot associated with the Volmer–Heyrovsky hydrogen evolution (HER) mechanism in 0.1 M KOH. By the hydrothermal process, 0.2 at % of platinum was anchored to the graphene foam surface, and the resultant sample of GrFoamPt yielded a value of 80 mV dec−1 Tafel associated with the Volmer–Tafel HER mechanism. Furthermore, Raman and infrared spectroscopy analysis, as well as scanning electron microscopy (SEM) were carried out to understand the structure of the samples.

scholarly journals Nitrogen-Doped Flower-Like Hybrid Structure Based on Three-Dimensional Graphene

2020 ◽  
Vol 6 (2) ◽  
pp. 40
Author(s):  
Kinshuk Dasgupta ◽  
Mahnoosh Khosravifar ◽  
Shrilekha Sawant ◽  
Paa Kwasi Adusei ◽  
Sathya Narayan Kanakaraj ◽  
...  
Keyword(s):  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Three Dimensional ◽  
Chemical Vapor ◽  
Hybrid Structure ◽  
High Specific Surface Area ◽  
Active Nitrogen ◽  
3D Graphene ◽  
Nitrogen Doped ◽  
N Doping

A new flower-like hybrid structure consisting of nitrogen-doped 3-dimensional (3D) graphene and vertically aligned graphene has been synthesized using a combination of low-pressure chemical vapor deposition (LPCVD) and plasma-enhanced chemical vapor deposition (PECVD) techniques. Active nitrogen (N) species were found to be essential for the growth of the flower-like morphology. N-doping was responsible for enhanced electrical conductivity and wettability of the obtained nano-carbon hybrid structure. Based on the conducted studies a growth mechanism has been proposed. The high specific surface area, low resistance to charge transfer and enhanced specific capacitance of this nitrogen-doped hybrid structure, makes it an excellent candidate material for supercapacitors.

scholarly journals Fabrication of 3D monolithic graphene foam/polycaprolactone porous nanocomposites for bioapplications

2020 ◽  
Vol 56 (9) ◽  
pp. 5581-5594
Author(s):  
Neda Bahremandi Tolou ◽  
Hamidreza Salimijazi ◽  
Theodoros Dikonimos ◽  
Giuliana Faggio ◽  
Giacomo Messina ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Three Dimensional ◽  
Chemical Vapor ◽  
Porous Polymer ◽  
Nerve Tissue ◽  
Inductive Heating ◽  
Chemical Vapor Deposition Growth ◽  
Graphene Foam ◽  
3D Graphene ◽  
Process Architecture

Abstract Aiming at the production of light, porous, conductive, biosafe composites, in this paper we are presenting a novel fabrication method for monolithic, three-dimensional (3D) graphene foam (GF)/porous polymer composites. The synthesis adopts a novel process architecture by using Ni foam templates in an inductive heating chemical vapor deposition growth process, and by removing Ni chemically while retaining graphene integrity by the reversible application of cyclododecane (CD); finally, nondestructive coating procedures with polycaprolactone (PCL) solutions have been developed. The composites can be optimized to enhance electrical conduction, flexibility and mechanical properties, while mixing PCL and CD allows to coat the GF with a novel mesoporous polymer coating. By tuning the GF properties, the typical electrical resistance of the 3D forms can be reduced to a few 10 s of Ohms, values that are maintained after the PCL coatings. The current study achieved a GF fraction ranging between 1 and 7.3 wt%, with even the lower graphene content composites showing acceptable electrical and mechanical properties. The properties of these conductive 3D-GF/PCL composites are in line with the requirements for applications in the field of nerve tissue engineering. Graphical abstract

One-pot hydrothermal synthesis of platinum nanoparticle-decorated three-dimensional nitrogen-doped graphene aerogel as a highly efficient electrocatalyst for methanol oxidation

RSC Advances ◽  
2016 ◽  
Vol 6 (74) ◽  
pp. 69973-69976 ◽  
Author(s):  
Xuan Zhang ◽  
Nan Hao ◽  
Xiaoya Dong ◽  
Saibo Chen ◽  
Zhou Zhou ◽  
...  
Keyword(s):  
Methanol Oxidation ◽  
Three Dimensional ◽  
Graphene Aerogel ◽  
One Pot ◽  
Platinum Nanoparticle ◽  
3D Graphene ◽  
Nitrogen Doped ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene ◽  
Hydrothermal Approach

Pt nanoparticle-decorated nitrogen-doped 3D graphene aerogel (PtNPs/3DNGA) composites were prepared through a one-pot hydrothermal approach and show superior catalytic activity in methanol oxidation.

scholarly journals Aqueous Preparation of Platinum Nanoflowers on Three-Dimensional Graphene for Efficient Methanol Oxidation

Catalysts ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 519 ◽  
Author(s):  
Ying Zhang ◽  
Zhouwei Shao ◽  
Qi Shen ◽  
Mengyang Li ◽  
Lin Xu ◽  
...  
Keyword(s):  
Methanol Oxidation ◽  
Three Dimensional ◽  
Carbon Electrode ◽  
Modified Glassy Carbon Electrode ◽  
Graphene Foam ◽  
Electrochemical Catalysis ◽  
3D Graphene ◽  
Graphene Electrode ◽  
Aqueous Method ◽  
Pt Nanowires

A facile aqueous method to construct a platinum nanoflowers (PtNFs)/three-dimensional (3D) graphene electrode for electrochemical catalysis was demonstrated. PtNFs composed of thin Pt nanowires with the length of 6–16 nm and the diameter of 2–3 nm were prepared on 3D graphene foam as a growth template in the aqueous solution without any surfactant. The 3D graphene foam was used for patterning PtNFs and controlling their morphology. The fabricated PtNF/3D graphene electrode was applied for electrocatalytic methanol oxidation. Electrochemical measurements show that the PtNF/3D graphene electrode has higher electrocatalytic activity and better stability than commercial Pt-C modified glassy carbon electrode. It displays promising potential for applications in fuel cells.

Beyond graphene foam, a new form of three-dimensional graphene for supercapacitor electrodes

2016 ◽  
Vol 4 (5) ◽  
pp. 1876-1886 ◽  
Author(s):  
Lu Zhang ◽  
Derek DeArmond ◽  
Noe T. Alvarez ◽  
Daoli Zhao ◽  
Tingting Wang ◽  
...  
Keyword(s):  
Energy Storage ◽  
Electrode Material ◽  
Three Dimensional ◽  
Fabrication Process ◽  
Graphene Foam ◽  
3D Graphene ◽  
Energy Storage Applications ◽  
New Form

Graphene foam (GF) is a three-dimensional (3D) graphene structure that has been intensively studied as an electrode material for energy storage applications. Here we report a new design and fabrication process of an electrode material called graphene pellet (GP) for energy storage applications.

Integration of network-like porous NiMoO4 nanoarchitectures assembled with ultrathin mesoporous nanosheets on three-dimensional graphene foam for highly reversible lithium storage

2015 ◽  
Vol 3 (26) ◽  
pp. 13691-13698 ◽  
Author(s):  
Bo Wang ◽  
Songmei Li ◽  
Xiaoyu Wu ◽  
Wenming Tian ◽  
Jianhua Liu ◽  
...  
Keyword(s):  
Porous Structure ◽  
Three Dimensional ◽  
Lithium Storage ◽  
Graphene Foam ◽  
3D Graphene

Interconnected ultrathin mesoporous NiMoO4 nanosheets with a network-like porous structure supported on a 3D graphene network for highly reversible lithium storage.

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