A Synthesize Protocol for Graphene Nanosheets

2016 ◽  
Vol 880 ◽  
pp. 3-6
Author(s):  
Yu Qin Yao ◽  
Yin Jie Cen ◽  
Richard D. Sisson ◽  
Jian Yu Liang
Keyword(s):  
Graphite Oxide ◽  
Reduction Method ◽  
Graphene Nanosheets ◽  
Thermal Reduction ◽  
Wet Chemical Method ◽  
Thermal Methods ◽  
Reduction Methods ◽  
Yield Quality ◽  
Wet Chemical ◽  
Graphite Oxides

Chemical synthesis is cheap and easy to be tailored. Reduction of graphite oxide to form graphene nanosheets is a necessary step that determines yield, quality, chemical and surface properties of graphene nanosheets. In this report, the reduction of graphite oxides by chemical and thermal methods has been employed to convert graphite oxide synthesized by the same wet chemical method using KMnO4 and H2O2. The characterization results from the two reduction methods indicate that a combination of wet oxidation of graphite and thermal reduction method is an efficient and environmental friendly way to produce graphene.

The Preparation of Graphene via Thermal Reduction Method

2012 ◽  
Vol 557-559 ◽  
pp. 1539-1542
Author(s):  
Jian Fang Wang ◽  
Ya Nan Lv ◽  
Yin Long ◽  
Cheng An Tao ◽  
Hui Zhu
Keyword(s):  
Graphene Oxide ◽  
High Temperature ◽  
Smooth Surface ◽  
Reduction Method ◽  
Thermal Reduction ◽  
Thermal Reaction ◽  
Thermal Method ◽  
High Quality ◽  
Graphene Surface ◽  
Reduction Methods

In this paper, the graphene oxide reducing by photochemical-thermal reduction and high-temperature thermal reduction was studied to get qualified graphene and avoid the re-aggregation. The results show that graphene obtained by both of the two reduction methods all maintained the original well-layered morphology of the graphene oxide. The graphene had smooth surface and high quality as completely reduced by high-temperature thermal method. However, the reduction the photochemical-thermal reaction was not sufficient and caused many vesicles on the graphene surface due to the low temperature and the lack of reaction time.

Preparation and Characterization of Graphene by Oxidation-Reduction Method

2013 ◽  
Vol 807-809 ◽  
pp. 2805-2808
Author(s):  
Zhao Xia Hou ◽  
Yin Zhou ◽  
Shao Hong Wang ◽  
Mei Han Wang ◽  
Xiao Dan Hu ◽  
...  
Keyword(s):  
Graphite Oxide ◽  
Reduction Method ◽  
Graphene Nanosheets ◽  
Colloidal Suspension ◽  
Exfoliated Graphite ◽  
X Ray Diffraction ◽  
X Ray ◽  
Oxidation Reduction ◽  
Ft Ir

Graphene was prepared by using hydrazine hydrate to reduce the exfoliated graphite oxide nanosheets in the aqueous colloidal suspension. The prepared graphene were characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction analysis (XRD) and scanning electron microscope (SEM), respectively. The results showed that part of oxygen containing groups of the exfoliated graphite oxide nanosheets disappeared and the conjugated p bond recovered after reduction. The thickness and size of the graphene nanosheets decreased.

Impact of LiTi2(PO4)3 coating on the electrochemical performance of Li1.2Ni0.13Mn0.54Co0.13O2 using a wet chemical method

Ionics ◽  
2021 ◽  
Vol 27 (4) ◽  
pp. 1465-1475
Author(s):  
Ning Zhang ◽  
Ying Li ◽  
Yadan Luo ◽  
Zhen Yang ◽  
Jiayao Lu
Keyword(s):  
Electrochemical Performance ◽  
Chemical Method ◽  
Wet Chemical Method ◽  
Wet Chemical

Hybrids of cobalt nanochains and polyvinylidene fluoride with enhanced microwave absorption performance

RSC Advances ◽  
2016 ◽  
Vol 6 (60) ◽  
pp. 55546-55551 ◽  
Author(s):  
Shu-Qing Lv ◽  
Ya-Fei Pan ◽  
Pei-Bo Yang ◽  
Guang-Sheng Wang
Keyword(s):  
Microwave Absorption ◽  
Polyvinylidene Fluoride ◽  
Chemical Method ◽  
Wet Chemical Method ◽  
Absorption Properties ◽  
Flexible Film ◽  
Absorption Performance ◽  
Wet Chemical ◽  
Microwave Absorption Performance

By using a simple wet chemical method and hot-molding procedure, a kind of flexible film with enhance absorption properties based on binary cobalt nanochains/polyvinylidene fluoride (PVDF) hybrids has been successfully fabricated.

Immobilized Recombinant Chitinase and its Inhibition Effect on Botrytis Cinerea

2014 ◽  
Vol 936 ◽  
pp. 674-680
Author(s):  
Na Zhang ◽  
Rui Xiang Yan ◽  
Wen Qiang Guan
Keyword(s):  
Reduction Method ◽  
Average Diameter ◽  
Thermal Reduction ◽  
Gray Mold ◽  
Magnetic Carrier ◽  
Reaction Conditions ◽  
Recombinant Chitinase ◽  
Crude Enzyme Solution ◽  
Infrared Spectrometer

To isolate recombinant chitinase quickly and boost its anti-fungi activities in vitro, functional magnetic nanometer carrier was used to immobilize recombinant chitinase from the crude enzyme solution and immobilized recombinant chitinase was applied to test whether it would inhibit the growth of gray mold from fruits. In this study, the carboxyl magnetic carrier was produced by solvent thermal reduction method and characterized by scanning electron microscope (SEM) and fourier transform infrared spectrometer (FTIR). Then, the carboxyl magnetic carrier activated by EDC/NHS was applied to immobilize recombinant chitinase and the immobilization efficiency was investigated by quantitative analysis. To obtain the highest immobilization efficiency, reaction conditions were optimized through combining different pH, temperature and reaction period. The results show that the surface of magnetic carrier was successfully carboxyl and the average diameter was 200nm. The immobilization efdiciency could reach the peak 64.43% after 7h reaction at the condition of pH 6 and 25°C. It also shows that immobilized recombinant chitinase can significantly inhibit the growth of gray mold isolated from table grape compared with the enzyme without immobilization with magnetic nanometer carrier.

Development of a wet chemical method for the synthesis of arrayed ZnO nanorods

2010 ◽  
Vol 500 (2) ◽  
pp. L17-L21 ◽  
Author(s):  
Shao-Hwa Hu ◽  
Yi-Chuan Chen ◽  
Chyi-Ching Hwang ◽  
Cheng-Hsiung Peng ◽  
Dah-Chuan Gong
Keyword(s):  
Chemical Method ◽  
Zno Nanorods ◽  
Wet Chemical Method ◽  
Wet Chemical

scholarly journals Characterization of ferrite nanoparticles for preparation of biocomposites

2017 ◽  
Vol 8 ◽  
pp. 1257-1265 ◽  
Author(s):  
Urszula Klekotka ◽  
Magdalena Rogowska ◽  
Dariusz Satuła ◽  
Beata Kalska-Szostko
Keyword(s):  
Chemical Method ◽  
Ferrite Nanoparticles ◽  
Chemical Activity ◽  
Nominal Composition ◽  
X Ray Diffraction ◽  
Wet Chemical Method ◽  
X Ray ◽  
Transmission Electron ◽  
Wet Chemical

Ferrite nanoparticles with nominal composition Me0.5Fe2.5O4 (Me = Co, Fe, Ni or Mn) have been successfully prepared by the wet chemical method. The obtained particles have a mean diameter of 11–16 ± 2 nm and were modified to improve their magnetic properties and chemical activity. The surface of the pristine nanoparticles was functionalized afterwards with –COOH and –NH2 groups to obtain a bioactive layer. To achieve our goal, two different modification approaches were realized. In the first one, glutaraldehyde was attached to the nanoparticles as a linker. In the second one, direct bonding of such nanoparticles with a bioparticle was studied. In subsequent steps, the nanoparticles were immobilized with enzymes such as albumin, glucose oxidase, lipase and trypsin as a test bioparticles. The characterization of the nanoparticles was acheived by transmission electron microscopy, X-ray diffraction, energy dispersive X-ray and Mössbauer spectroscopy. The effect of the obtained biocomposites was monitored by Fourier transform infrared spectroscopy. The obtained results show that in some cases the use of glutaraldehyde was crucial (albumin).

Wet chemical method for synthesis of superparamagnetic alloyed NiPd and NiPt nanomagnets in micelles

2003 ◽  
Vol 265 (1) ◽  
pp. 23-28 ◽  
Author(s):  
Madhuri Mandal ◽  
Subrata Kundu ◽  
Sujit Kumar Ghosh ◽  
Tapan K. Sau ◽  
S.M. Yusuf ◽  
...  
Keyword(s):  
Chemical Method ◽  
Wet Chemical Method ◽  
Wet Chemical
Sign in / Sign up

Export Citation Format

Share Document