Parameter Study of Three-Dimensional Printing Graphene Oxide Based on Directional Freezing

2016 ◽  
Vol 139 (3) ◽  
Author(s):  
Feng Zhang ◽  
Feng Yang ◽  
Dong Lin ◽  
Chi Zhou
Keyword(s):  
Graphene Oxide ◽  
Optimal Parameter ◽  
Applied Pressure ◽  
Three Dimensional ◽  
Parameter Study ◽  
Print Quality ◽  
3D Graphene ◽  
Optical And Mechanical Properties ◽  
Complex Architecture ◽  
Directional Freezing

Graphene is one of the most promising carbon nanomaterial due to its excellent electrical, thermal, optical, and mechanical properties. However, it is still very challenging to unlock its exotic properties and widely adopt it in real-world applications. In this paper, we introduce a new three-dimensional (3D) graphene structure printing approach with pure graphene oxide (GO) material, better interlayer bonding, and complex architecture printing capability. Various parameters related to this novel process are discussed in detail in order to improve the printability, reliability, and accuracy. We have shown that the print quality largely depends on the duty cycle of print head, applied pressure, and traveling velocity during printing. A set of printed samples are presented to demonstrate the effectiveness of the proposed technique along with the optimal parameter settings. The proposed process proves to be a promising 3D printing technique for fabricating multiscale nanomaterial structures. The theory revealed and parameters investigated herein are expected to significantly advance the knowledge and understanding of the fundamental mechanism of the proposed directional freezing-based 3D nano printing process. Furthermore, the outcome of this research has the potential to open up a new avenue for fabricating multifunctional nanomaterial objects.

Parameter Study on 3D-Printing Graphene Oxidize Based on Directional Freezing

2016 ◽  
Author(s):  
Feng Zhang ◽  
Feng Yang ◽  
Dong Lin ◽  
Chi Zhou
Keyword(s):  
3D Printing ◽  
Optimal Parameter ◽  
Applied Pressure ◽  
Parameter Study ◽  
Print Quality ◽  
Oxide Material ◽  
3D Graphene ◽  
Optical And Mechanical Properties ◽  
Functional Nanomaterial ◽  
Directional Freezing

Graphene is one of the most promising carbon nanomaterial due to its excellent electrical, thermal, optical and mechanical properties. However, it is still very challenging to unlock its exotic properties and widely adopt it in real-world applications. In this paper, we introduces a new 3D graphene structure printing approach with pure graphene oxide material, better inter-layer bonding, and complex architecture printing capability. Various parameters related to this novel process are discussed in detail in order to improve the printability, reliability and accuracy. We have shown that the print quality largely depends on the duty cycle of print head, applied pressure and travel velocity during printing. A palette of printed samples are presented to demonstrate the effectiveness of the proposed technique along with the optimal parameter settings. The proposed process proves to be a promising 3D printing technique for fabricating multi-scale nanomaterial structures. The theory revealed and parameters investigated herein are expected to significantly advance the knowledge and understanding of the fundamental mechanism of the proposed directional freezing based 3D nano printing process. Furthermore the outcome of this research has the potential to open up a new avenue for fabricating multi-functional nanomaterial objects.

Three-Dimensional Holey-Graphene Architectures for Highly Sensitive Enzymatic Electrochemical Determination of Hydrogen Peroxide

2019 ◽  
Vol 19 (11) ◽  
pp. 7404-7409 ◽  
Author(s):  
Aihua Jing ◽  
Gaofeng Liang ◽  
Hao Shi ◽  
Yixin Yuan ◽  
Quanxing Zhan ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Hydrogen Peroxide ◽  
Graphene Oxide ◽  
Three Dimensional ◽  
Electrochemical Determination ◽  
High Specific Surface Area ◽  
3D Graphene ◽  
Practical Applications ◽  
Transmission Electron ◽  
Mild Defect

Three-dimensional (3D) graphene with high specific surface area, excellent conductivity and designed porosity is essential for many practical applications. Herein, holey graphene oxide with nano pores was facilely prepared via a convenient mild defect-etching reaction and then fabricated to 3D nanostructures via a reduction method. Based on the 3D architectures, a novel enzymatic hydrogen peroxide sensor was successfully fabricated. Transmission electron microscopy (TEM), scanning electron microscopy (SEM), fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) were used to characterize the 3D holey graphene oxide architectures (3DHGO). Cyclic voltammetry (CV) was used to evaluate the electrochemical performance of 3DHGO at glassy carbon electrode (GCE). Excellent electrocatalytic activity to the reduction of H2O2 was observed, and a linear range of 5.0×10-8~5.0×10-5 M with a detection limit of 3.8×10-9 M was obtained. These results indicated that 3DHGO have potential as electrochemical biosensors.

Three-Dimensional Graphene Oxide-Supported Zinc Oxide Scaffold as a High-Efficiency Adsorbent for Desulfurization

NANO ◽  
2020 ◽  
Vol 15 (05) ◽  
pp. 2050059
Author(s):  
Yan Liu ◽  
Xiaojun Zhang ◽  
Meiyan Yang ◽  
Bowen Guo ◽  
Jixiang Guo ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Graphene Oxide ◽  
High Efficiency ◽  
Porous Scaffold ◽  
Specific Binding ◽  
Three Dimensional ◽  
3D Graphene ◽  
Fcc Gasoline ◽  
And Control ◽  
Aryl Sulfides

Sulfur oxides are air pollutants derived mainly from the combustion of gasoline. Reducing the sulfur content of fluid catalytic cracking (FCC) gasoline is of key importance for the prevention and control of atmospheric pollution. We describe herein the fabrication and characterization of a porous, three-dimensional (3D) graphene oxide-supported zinc oxide (GO/ZnO) scaffold as an adsorbent for desulfurization with various model compounds and real FCC gasoline. The uniform and stable dispersion of ZnO nanoparticles on the surface of GO facilitates the specific binding of sulfides. Moreover, GO synergistically adsorbs aryl sulfides via [Formula: see text]–[Formula: see text] stacking interactions. The GO/ZnO nanosheets were further self-assembled into a 3D porous scaffold that effectively trapped sulfides and inhibited desorption. These scaffolds exhibited excellent desulfurization performance with maximum sulfur capacity up to 29.73[Formula: see text]mg S/g. This work provides a novel perspective on the fabrication of high-efficiency adsorbents for gasoline pretreatment.

scholarly journals From two-dimensional graphene oxide to three-dimensional honeycomb-like Ni 3 S 2 @graphene oxide composite: insight into structure and electrocatalytic properties

2017 ◽  
Vol 4 (12) ◽  
pp. 171409 ◽  
Author(s):  
Xinting Wei ◽  
Yueqiang Li ◽  
Wenli Xu ◽  
Kaixuan Zhang ◽  
Jie Yin ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Three Dimensional ◽  
Charge Transfer Resistance ◽  
Photoelectrochemical Cells ◽  
One Pot ◽  
Transfer Resistance ◽  
3D Graphene ◽  
Practical Applications ◽  
Oxide Composite ◽  
Solar Water Splitting

Three-dimensional (3D) graphene composites have drawn increasing attention in energy storage/conversion applications due to their unique structures and properties. Herein, we synthesized 3D honeycomb-like Ni 3 S 2 @graphene oxide composite (3D honeycomb-like Ni 3 S 2 @GO) by a one-pot hydrothermal method. We found that positive charges of Ni 2+ and negative charges of NO 3 − in Ni(NO 3 ) 2 induced a transformation of graphene oxide with smooth surface into graphene oxide with wrinkled surface (w-GO). The w-GO in the mixing solution of Ni(NO 3 ) 2 /thioacetamide/H 2 O evolved into 3D honeycomb-like Ni 3 S 2 @GO in solvothermal process. The GO effectively inhibited the aggregation of Ni 3 S 2 nanoparticles. Photoelectrochemical cells based on 3D Ni 3 S 2 @GO synthesized at 60 mM l −1 Ni(NO 3 ) 2 exhibited the best energy conversion efficiency. 3D Ni 3 S 2 @GO had smaller charge transfer resistance and larger exchange current density than pure Ni 3 S 2 for iodine reduction reaction. The cyclic stability of 3D honeycomb-like Ni 3 S 2 @GO was good in the iodine electrolyte. Results are of great interest for fundamental research and practical applications of 3D GO and its composites in solar water-splitting, artificial photoelectrochemical cells, electrocatalysts and Li-S or Na-S batteries.

scholarly journals Facile Fabrication of 3D Graphene–Silica Hydrogel Composite for Enhanced Removal of Mercury Ions

Nanomaterials ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 314 ◽  
Author(s):  
Jinrong Lu ◽  
Xiaonan Wu ◽  
Yao Li ◽  
Yinghua Liang ◽  
Wenquan Cui
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Silica Gel ◽  
Chemical Reduction ◽  
Three Dimensional ◽  
Sem Analysis ◽  
Mechanism Study ◽  
Modified Silica Gel ◽  
3D Graphene ◽  
Reduced Graphene

Adsorption is a highly promising and widely used approach to remove Hg(II) ions from contaminated water. The key to this technology is exploring the effective adsorbent. The three-dimensional (3D) graphene as reduced graphene oxide hydrogel (rGH)-encapsulated silica gel (SG-PEI/rGH) was prepared by a moderate chemical reduction strategy using ascorbic acid. This composite structure was characterized by FTIR, XRD, and SEM analysis and used as adsorbents for Hg(II) ions. Its adsorption capacity toward Hg(II) ions was 266 mg/g and increased about 32% compared with the silica gel because of reduced graphene oxide hydrogel (rGH). Mechanism study showed that the high adsorption ability was due to the formation of an N–Hg complex with multi-amino groups on the surface of polyethyleneimine-modified silica gel (SG-PEI) and the rapid diffusion of adsorbed ions attributed to the rGH network structure. This composite SG-PEI/rGH would be a promising material for the removal of Hg(II) ions.

3D graphene oxide supramolecular hybrid hydrogel with well-ordered interior microstructure prepared by a host–guest inclusion-induced self-assembly strategy

RSC Advances ◽  
2016 ◽  
Vol 6 (97) ◽  
pp. 94723-94730 ◽  
Author(s):  
Wei Ha ◽  
Jing Yu ◽  
Juan Chen ◽  
Yan-ping Shi
Keyword(s):  
Graphene Oxide ◽  
Porous Structure ◽  
Self Assembly ◽  
Three Dimensional ◽  
Supramolecular Hydrogel ◽  
Hybrid Hydrogel ◽  
3D Graphene ◽  
Assembly Strategy

A three-dimensional self-assembly strategy for constructing graphene oxide hybrid supramolecular hydrogel with regular porous structure was developed.

Graphene Oxide and Its Derivatives: Their Synthesis and Use in Organic Synthesis

2019 ◽  
Vol 23 (2) ◽  
pp. 188-204 ◽  
Author(s):  
Xiangjun Peng ◽  
Xianyun Xu ◽  
Fujiang Huang ◽  
Qian Liu ◽  
Liangxian Liu
Keyword(s):  
Graphene Oxide ◽  
Carbon Materials ◽  
Device Fabrication ◽  
Organic Reactions ◽  
Bond Forming ◽  
Bond Forming Reactions ◽  
Modern Physics ◽  
Recent Developments ◽  
Optical And Mechanical Properties ◽  
Nitrogen Double Bond

Since Geim and co-workers reported their groundbreaking experiments on graphene, research on graphene oxide (GO) and its derivatives has greatly influenced the field of modern physics, chemistry, device fabrication, material science, and nanotechnology. The unique structure and fascinating properties of these carbon materials can be ascribed to their eminent chemical, electronic, electrochemical, optical, and mechanical properties of GO and its derivatives, particularly compared to other carbon allotropes. The present Review aims to provide an overview on the recent developments in the preparation of GO and its derivatives and their applications in organic reactions. We will first outline the synthesis of GO and its derivatives. Then, we will discuss the major sections about their application as stoichiometric and catalytic oxidants in organic reactions, a particular emphasis on the carbon-carbon, carbon-oxygen, and carbon-nitrogen single bond-forming reactions, as well as carbon-oxygen and carbon-nitrogen double bond-forming reactions. Simultaneously, this Review also describes briefly transition metal supported on GO or its derivatives as a catalyst for organic reaction. Lastly, we will present an outlook of potential areas where GO and its derivatives may be expected to find utility or opportunity for further growth and study.

scholarly journals Hugoniot Data and Equation of State Parameters for an Ultra-High Performance Concrete

2021 ◽  
Author(s):  
C. Sauer ◽  
F. Bagusat ◽  
M.-L. Ruiz-Ripoll ◽  
C. Roller ◽  
M. Sauer ◽  
...  
Keyword(s):  
Equation Of State ◽  
High Performance ◽  
High Performance Concrete ◽  
Applied Pressure ◽  
High Strength ◽  
Parameter Study ◽  
Ultra High Performance Concrete ◽  
Data Set ◽  
Shock Response ◽  
Particle Velocities

AbstractThis work aims at the characterization of a modern concrete material. For this purpose, we perform two experimental series of inverse planar plate impact (PPI) tests with the ultra-high performance concrete B4Q, using two different witness plate materials. Hugoniot data in the range of particle velocities from 180 to 840 m/s and stresses from 1.1 to 7.5 GPa is derived from both series. Within the experimental accuracy, they can be seen as one consistent data set. Moreover, we conduct corresponding numerical simulations and find a reasonably good agreement between simulated and experimentally obtained curves. From the simulated curves, we derive numerical Hugoniot results that serve as a homogenized, mean shock response of B4Q and add further consistency to the data set. Additionally, the comparison of simulated and experimentally determined results allows us to identify experimental outliers. Furthermore, we perform a parameter study which shows that a significant influence of the applied pressure dependent strength model on the derived equation of state (EOS) parameters is unlikely. In order to compare the current results to our own partially reevaluated previous work and selected recent results from literature, we use simulations to numerically extrapolate the Hugoniot results. Considering their inhomogeneous nature, a consistent picture emerges for the shock response of the discussed concrete and high-strength mortar materials. Hugoniot results from this and earlier work are presented for further comparisons. In addition, a full parameter set for B4Q, including validated EOS parameters, is provided for the application in simulations of impact and blast scenarios.

Three-Dimensional Printable Gelatin Hydrogels Incorporating Graphene Oxide to Enable Spontaneous Myogenic Differentiation

2021 ◽  
Vol 10 (4) ◽  
pp. 426-432
Author(s):  
Moon Sung Kang ◽  
Jeon Il Kang ◽  
Phuong Le Thi ◽  
Kyung Min Park ◽  
Suck Won Hong ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Myogenic Differentiation ◽  
Three Dimensional
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