An Unexpected Transformation of Organic Solvents into 2D Fluorescent Quantum Dots during Ultrasonication-Assisted Liquid-Phase Exfoliation

2019 ◽  
Vol 123 (41) ◽  
pp. 25412-25421 ◽  
Author(s):  
Saroj Kumar Das ◽  
Ramchandra Gawas ◽  
Satadru Chakrabarty ◽  
Gunda Harini ◽  
Rishabh Patidar ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Liquid Phase ◽  
Organic Solvents ◽  
Liquid Phase Exfoliation ◽  
Unexpected Transformation

Production of carbon dots during the liquid phase exfoliation of MoS2 quantum dots

Carbon ◽  
2019 ◽  
Vol 155 ◽  
pp. 243-249 ◽  
Author(s):  
Weimin Zhang ◽  
Jinhong Du ◽  
Zhibo Liu ◽  
Dingdong Zhang ◽  
Qinwei Wei ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Liquid Phase ◽  
Carbon Dots ◽  
Liquid Phase Exfoliation

Ultrasmall Bismuth Quantum Dots: Facile Liquid-Phase Exfoliation, Characterization, and Application in High-Performance UV–Vis Photodetector

ACS Photonics ◽  
2017 ◽  
Vol 5 (2) ◽  
pp. 621-629 ◽  
Author(s):  
Chenyang Xing ◽  
Weichun Huang ◽  
Zhongjian Xie ◽  
Jinlai Zhao ◽  
Dingtao Ma ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Liquid Phase ◽  
High Performance ◽  
Liquid Phase Exfoliation

Liquid-phase exfoliation of graphene in organic solvents with addition of naphthalene

2014 ◽  
Vol 418 ◽  
pp. 37-42 ◽  
Author(s):  
Jiasheng Xu ◽  
Dinh Khoi Dang ◽  
Van Tam Tran ◽  
Xiaoyang Liu ◽  
Jin Suk Chung ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Organic Solvents ◽  
Liquid Phase Exfoliation

Liquid-Phase Exfoliation of Graphene in Organic Solvents with Addition of Picric Acid

2021 ◽  
Vol 33 ◽  
pp. 47-60
Author(s):  
Syed Sajid Ali Shah ◽  
Habib Nasir ◽  
Shehla Honey
Keyword(s):  
Liquid Phase ◽  
Organic Solvents ◽  
Picric Acid ◽  
Graphite Powder ◽  
Sem Analysis ◽  
Production Yield ◽  
Force Microscopy ◽  
One Step ◽  
Graphene Production ◽  
Liquid Phase Exfoliation

In this work, graphene was produced by liquid-phase exfoliation of graphite in different organic solvents with addition of picric acid. The graphene was easily produced by one step ultra-sonication of graphite powder in the organic solvents. The addition of picric acid has increased the graphene production yield in most of the solvents tested in this work. Picric acid serves as a “molecular wedge” to intercalate into the edge of graphite, which plays a key role during sonication and significantly improves the production yield of graphene. The products were analyzed by microscopic techniques, including atomic force microscopy (AFM) and scanning electron microscope (SEM). The AFM images indicate that the exfoliation efficiency and amount of graphene increased by addition of picric acid in organic solvents. Moreover, the AFM images also indicate presence of bilayer graphene. SEM analysis also shows that the addition of picric acid into the organic solvent favors the exfoliation process. The produced graphene was also analyzed by XRD, FTIR, Raman and UV-visible spectroscopy. The XRD results illustrate that exfoliation was best achieved in N-methyl-2-pyrrolidone (NMP) as a solvent. FTIR and Raman results indicate that addition of picric acid has slightly defected the produced graphene surface. The amount of graphene concentration was calculated by using Beer Lambert law, and it was observed that the graphene production yield was increased by using picric acid in most of the solvents. The maximum amount of graphene concentration (0.159 mg/ml) was achieved by adding 30 mg of picric acid in NMP.

Tunable UV-visible absorption of SnS2layered quantum dots produced by liquid phase exfoliation

Nanoscale ◽  
2017 ◽  
Vol 9 (5) ◽  
pp. 1820-1826 ◽  
Author(s):  
Xiao Fu ◽  
P. Ilanchezhiyan ◽  
G. Mohan Kumar ◽  
Hak Dong Cho ◽  
Lei Zhang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Liquid Phase ◽  
Visible Absorption ◽  
Uv Visible ◽  
Liquid Phase Exfoliation

Graphene quantum dots derived from platelet graphite nanofibers by liquid-phase exfoliation

2014 ◽  
Vol 78 ◽  
pp. 314-319 ◽  
Author(s):  
Yu-Wen Shih ◽  
Guann-Wei Tseng ◽  
Cheng-Yu Hsieh ◽  
Yuan-Yao Li ◽  
Akiyoshi Sakoda
Keyword(s):  
Quantum Dots ◽  
Liquid Phase ◽  
Graphene Quantum Dots ◽  
Graphite Nanofibers ◽  
Liquid Phase Exfoliation

One-pot liquid-phase exfoliation from graphite to graphene with carbon quantum dots

Nanoscale ◽  
2015 ◽  
Vol 7 (23) ◽  
pp. 10527-10534 ◽  
Author(s):  
Minghan Xu ◽  
Wei Zhang ◽  
Zhi Yang ◽  
Fan Yu ◽  
Yujie Ma ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Liquid Phase ◽  
Carbon Quantum Dots ◽  
One Pot ◽  
Liquid Phase Exfoliation
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