Large scale preparation of graphene quantum dots from graphite oxide in pure water via one-step electrochemical tailoring

RSC Advances ◽  
2015 ◽  
Vol 5 (38) ◽  
pp. 29704-29707 ◽  
Author(s):  
Jianhui Deng ◽  
Qiujun Lu ◽  
Haitao Li ◽  
Youyu Zhang ◽  
Shouzuo Yao
Keyword(s):  
Quantum Dots ◽  
Graphite Oxide ◽  
Electrochemical Synthesis ◽  
Large Scale ◽  
Pure Water ◽  
Graphene Quantum Dots ◽  
Large Scale Preparation ◽  
One Step ◽  
Scale Preparation

A novel electrochemical synthesis for graphene quantum dots (GQD) on a large scale from graphite oxide (GO) in pure water has been proposed.

Large scale preparation of graphene quantum dots from graphite with tunable fluorescence properties

2013 ◽  
Vol 15 (24) ◽  
pp. 9907 ◽  
Author(s):  
Yiqing Sun ◽  
Shiqi Wang ◽  
Chun Li ◽  
Peihui Luo ◽  
Lei Tao ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Large Scale ◽  
Graphene Quantum Dots ◽  
Fluorescence Properties ◽  
Large Scale Preparation ◽  
Scale Preparation

Large-scale preparation of micro-gradient structured sub-micro fibrous membranes with narrow diameter distributions for high-efficiency air purification

2019 ◽  
Vol 6 (12) ◽  
pp. 3560-3578 ◽  
Author(s):  
Mengjuan Zhou ◽  
Mengzhen Fang ◽  
Zhenzhen Quan ◽  
Hongnan Zhang ◽  
Xiaohong Qin ◽  
...  
Keyword(s):  
Free Surface ◽  
Large Scale ◽  
High Efficiency ◽  
Air Purification ◽  
Air Filters ◽  
Large Scale Preparation ◽  
Free Surface Electrospinning ◽  
One Step ◽  
Scale Preparation ◽  
Fibrous Membranes

Micro-gradient structured PAN sub-micro fibrous membrane with high-efficiency air purification performance was fabricated via one-step free surface electrospinning with large-scale yield, firstly demonstrated as air filters.

scholarly journals Green Preparation of Aqueous Graphene Dispersion and Study on Its Dispersion Stability

Materials ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4069
Author(s):  
Liangchuan Li ◽  
Ming Zhou ◽  
Long Jin ◽  
Youtang Mo ◽  
Enyong Xu ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Large Scale ◽  
Pure Water ◽  
Industrial Applications ◽  
Dispersion Stability ◽  
Solubility Parameters ◽  
Stable Dispersion ◽  
Number Of Layers ◽  
Large Scale Preparation ◽  
Scale Preparation

The large-scale preparation of stable graphene aqueous dispersion has been a challenge in the theoretical research and industrial applications of graphene. This study determined the suitable exfoliation agent for overcoming the van der Waals force between the layers of expanded graphite sheets using the liquid-phase exfoliation method on the basis of surface energy theory to prepare a single layer of graphene. To evenly and stably disperse graphene in pure water, the dispersants were selected based on Hansen solubility parameters, namely, hydrophilicity, heterocyclic structure and easy combinative features. The graphene exfoliation grade and the dispersion stability, number of layers and defect density in the dispersion were analysed under Tyndall phenomenon using volume sedimentation method, zeta potential analysis, scanning electron microscopy, Raman spectroscopy and atomic force microscopy characterization. Subsequently, the long-chain quaternary ammonium salt cationic surfactant octadecyltrimethylammonium chloride (0.3 wt.%) was electrolyzed in pure water to form ammonium ions, which promoted hydrogen bonding in the remaining oxygen-containing groups on the surface of the stripped graphene. Forming the electrostatic steric hindrance effect to achieve the stable dispersion of graphene in water can exfoliate a minimum of eight layers of graphene nanosheets; the average number of layers was less than 14. The 0.1 wt.% (sodium dodecylbenzene sulfonate: melamine = 1:1) mixed system forms π–π interaction and hydrogen bonding with graphene in pure water, which allow the stable dispersion of graphene for 22 days without sedimentation. The findings can be beneficial for the large-scale preparation of waterborne graphene in industrial applications.

scholarly journals One-step collagenase method for zona pellucida removal in unfertilized eggs: easy and gentle method for large-scale preparation

2011 ◽  
Vol 10 (2) ◽  
pp. 97-103 ◽  
Author(s):  
Kenji Yamatoya ◽  
Chizuru Ito ◽  
Motoyuki Araki ◽  
Ryoji Furuse ◽  
Kiyotaka Toshimori
Keyword(s):  
Zona Pellucida ◽  
Large Scale ◽  
Large Scale Preparation ◽  
One Step ◽  
Scale Preparation

Controllable ionic liquid-assisted electrochemical exfoliation of carbon fibers for the green and large-scale preparation of functionalized graphene quantum dots endowed with multicolor emission and size tunability

2017 ◽  
Vol 5 (24) ◽  
pp. 6092-6100 ◽  
Author(s):  
Yuting Yan ◽  
Henan Li ◽  
Qirui Wang ◽  
Hanping Mao ◽  
Wang Kun
Keyword(s):  
Ionic Liquid ◽  
Carbon Fibers ◽  
Large Scale ◽  
Graphene Quantum Dots ◽  
Functionalized Graphene ◽  
Electrochemical Exfoliation ◽  
Large Scale Preparation ◽  
New Strategy ◽  
Scale Preparation ◽  
Controllable Preparation

A new strategy for the controllable preparation of GQDs with multicolor emission and size tunability was designed via ionic liquid-assisted electrochemical cutting of carbon fibers.

One-step and large-scale preparation of TiO2/amorphous carbon composites with excellent visible light photocatalytic properties

RSC Advances ◽  
2016 ◽  
Vol 6 (70) ◽  
pp. 65607-65612 ◽  
Author(s):  
Dawei Sha ◽  
Jingjing Wang ◽  
Xiao Wu ◽  
Han Zou ◽  
Yu Dai ◽  
...  
Keyword(s):  
Visible Light ◽  
Amorphous Carbon ◽  
Large Scale ◽  
Carbon Composite ◽  
Active Species ◽  
Carbon Composites ◽  
Large Scale Preparation ◽  
One Step ◽  
Scale Preparation ◽  
Vacancy Doping

The TiO2/amorphous carbon composite, with narrower band gap caused by oxygen vacancy, doping carbon and bridging hydroxyls, has good visible light property. In the photodegradating RhB process, hole and superoxide radical are the main active species.

Large-Scale Preparation of [13C]Methyl Phenyl Sulfide from [13C]Methanol by a One-Step Process

2002 ◽  
Vol 6 (6) ◽  
pp. 851-854 ◽  
Author(s):  
Rodolfo A. Martinez ◽  
Marc A. Alvarez ◽  
Stephen P. Velarde ◽  
Louis A. “Pete” Silks ◽  
Philip L. Stotter ◽  
...  
Keyword(s):  
Large Scale ◽  
Step Process ◽  
Phenyl Sulfide ◽  
Methyl Phenyl Sulfide ◽  
Large Scale Preparation ◽  
One Step ◽  
Scale Preparation ◽  
Methyl Phenyl

A novel one-pot route for large-scale preparation of highly photoluminescent carbon quantum dots powders

Nanoscale ◽  
2013 ◽  
Vol 5 (20) ◽  
pp. 9558 ◽  
Author(s):  
Juan Hou ◽  
Jin Yan ◽  
Qi Zhao ◽  
Yi Li ◽  
Hong Ding ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Large Scale ◽  
Carbon Quantum Dots ◽  
One Pot ◽  
Large Scale Preparation ◽  
Scale Preparation
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