scholarly journals Oxygen Functional Groups on MWCNT Surface as Critical Factor Boosting T2 Relaxation Rate of Water Protons: Towards Improved CNT-Based Contrast Agents

2020 ◽  
Vol Volume 15 ◽  
pp. 7433-7450
Author(s):  
Mateusz Michał Tomczyk ◽  
Sławomir Boncel ◽  
Artur Herman ◽  
Tomasz Krawczyk ◽  
Agata Jakóbik-Kolon ◽  
...  
Keyword(s):  
Contrast Agents ◽  
Relaxation Rate ◽  
Functional Groups ◽  
Critical Factor ◽  
T2 Relaxation ◽  
Mwcnt Surface ◽  
Oxygen Functional Groups

scholarly journals Electrochemical Evaluation of Surface Modified Free-Standing CNT Electrode for Li–O2 Battery Cathode

Energies ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 4196
Author(s):  
Ji Hyeon Lee ◽  
Hyun Wook Jung ◽  
In Soo Kim ◽  
Min Park ◽  
Hyung-Seok Kim
Keyword(s):  
Functional Groups ◽  
Atomic Layer ◽  
Free Standing ◽  
Coating Technology ◽  
Oxygen Functional Groups ◽  
Layer Deposition ◽  
Discharge Product ◽  
Effect Of Oxygen ◽  
Surface Modified ◽  
Electrochemical Evaluation

In this study, carbon nanotubes (CNTs) were used as cathodes for lithium–oxygen (Li–O2) batteries to confirm the effect of oxygen functional groups present on the CNT surface on Li–O2 battery performance. A coating technology using atomic layer deposition was introduced to remove the oxygen functional groups present on the CNT surface, and ZnO without catalytic properties was adopted as a coating material to exclude the effect of catalytic reaction. An acid treatment process (H2SO4:HNO3 = 3:1) was conducted to increase the oxygen functional groups of the existing CNTs. Therefore, it was confirmed that ZnO@CNT with reduced oxygen functional groups lowered the charging overpotential by approximately 230 mV and increased the yield of Li2O2, a discharge product, by approximately 13%. Hence, we can conclude that the ZnO@CNT is suitable as a cathode material for Li–O2 batteries.

ChemInform Abstract: Graphene Oxide Catalyzed C-H Bond Activation: The Importance of Oxygen Functional Groups for Biaryl Construction.

ChemInform ◽  
2016 ◽  
Vol 47 (26) ◽  
Author(s):  
Yongjun Gao ◽  
Pei Tang ◽  
Hu Zhou ◽  
Wei Zhang ◽  
Hanjun Yang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Functional Groups ◽  
Bond Activation ◽  
Oxygen Functional Groups

Influence of Inherently Present Oxygen-Functional Groups on Coal Fluidity and Coke Strength

2018 ◽  
Vol 32 (2) ◽  
pp. 1657-1664 ◽  
Author(s):  
Yuuki Mochizuki ◽  
Ryo Naganuma ◽  
Naoto Tsubouchi
Keyword(s):  
Functional Groups ◽  
Coke Strength ◽  
Oxygen Functional Groups
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