scholarly journals REMOVAL OF O,M,P-XYLENE FROM AIR SAMPLES ON OXIDIZED CARBON NANOTUBES CARTRIDGES

2018 ◽  
Vol 56 (2A) ◽  
pp. 226-233
Author(s):  
Le Huu Quynh Anh
Keyword(s):  
Carbon Nanotubes ◽  
Selective Adsorption ◽  
Multiwalled Carbon ◽  
Air Samples ◽  
Pristine Cnts ◽  
Oxidized Carbon ◽  
Oxidized Carbon Nanotubes ◽  
Cnts Surface ◽  
Ft Ir ◽  
Xylene Isomers

Carbon nanotubes (CNTs) have been considered as an excellent adsorbent in environmental engineering, especially for treatment of volatile organic compounds (VOCs). The paper presents a new approach for the selective adsorption of Xylene isomers from air samples using nanomaterial based on oxidized multiwalled carbon nanotubes. In the first study, the functionalization of two oxidized MWCNTs was achieved with hydrogen peroxide and sodium hypochlorite. The characterization of functionalized CNTs (CNT-NaOCl, CNT-H2O2) was performed by Fourier transform infrared spectroscopy (FT-IR) and X-Ray diffractometer (XRD). Afterthat, the applications of pristine CNTs and oxidized CNTs for removal of three Xylene isomers from air samples were discussed. The results demonstrate that the correlation of CNTs and three isomers was significantly different with an affinity order o-Xylene > m-Xylene > p-Xylene. The oxidized CNTs with carbonyl groups increased significantly its adsorption capacity for these isomers. A comparison in term of adsorption performance shows that the framework distinguishes among these adsorbents due to the dispersive properties and the electrostatic interaction between the Xylene isomers and oxidized CNTs surface.

Dehydrogenation of Bicyclohexyl on a Pt-Catalyst on the Basis of Oxidized Carbon Nanotubes

2018 ◽  
Vol 482 (1) ◽  
pp. 52-55
Author(s):  
A. Kalenchuk ◽  
◽  
S. Chernyak ◽  
V. Bogdan ◽  
V. Lunin ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Pt Catalyst ◽  
Oxidized Carbon ◽  
Oxidized Carbon Nanotubes

Interaction of aqueous suspensions of single-walled oxidized carbon nanotubes with inorganic and organic electrolytes

2021 ◽  
pp. 117948
Author(s):  
Anna N. Laguta ◽  
Nikolay O. Mchedlov-Petrossyan ◽  
Sergey I. Bogatyrenko ◽  
Sergiy M. Kovalenko ◽  
Natalya D. Bunyatyan ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Organic Electrolytes ◽  
Aqueous Suspensions ◽  
Oxidized Carbon ◽  
Oxidized Carbon Nanotubes ◽  
Inorganic And Organic

Hemostatic Effect of Aminated Multiwalled Carbon Nanotubes/Oxidized Regenerated Cellulose Nanocomposites

2019 ◽  
Vol 19 (11) ◽  
pp. 7410-7415 ◽  
Author(s):  
Baode Zhang ◽  
Ali Nabipour Chakoli ◽  
Jin Mei He ◽  
Yu Dong Huang ◽  
Andrey N. Aleshin
Keyword(s):  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Regenerated Cellulose ◽  
Oxidized Regenerated Cellulose ◽  
Multiwalled Carbon ◽  
Hemostatic Effect ◽  
Pristine Mwcnts ◽  
Ft Ir ◽  
Cellulose Nanocomposites

We have investigated the covalent conjugation of aminated multiwalled carbon nanotubes (MWCNTNH2)s with Oxidized Regenerated Cellulose (ORC) in order to enhance the hemostatic effect. The MWCNT-NH2s were prepared by functionalization of pristine MWCNTs (pMWCNTs) using amine groups. Neat ORC gauze and MWCNT-NH2s were reacted using glutamic acid as cross linking bridge. We investigated an amination of pMWCNTs as well as the dispersion of MWCNT-NH2s in the ORC gauze as matrix and their interfacial interactions by SEM and FT-IR. The results revealed that relatively strong interaction exists between aminated MWCNTs and the ORC macromolecules. The hydrophilicity test results in the significant increment of water uptake of MWCNT-NH2s/ORC composites with increasing the concentration of MWCNT-NH2s in composite. The in-vitro procoagulation test shows that the MWCNT-NH2s/ORC gauzes have significant procoagulant activity. The hemostatic evaluation of MWCNT-NH2s/ORC composites on rabbits shows that the aminated MWCNTs increase the rate of blood stopping and hence they decrease the blood loosing from injured sites. Hemostatic evaluation indicates that the MWCNT-NH2s/ORC gauze has a valuable hemostatic performance. The products of platelets release reaction, activated platelets glycoprotein and activated clotting enzymes were increased simultaneously. The mechanism of the hemostasis for MWCNT-NH2s/ORC gauze is discussed.

Synthesis and Performance of Dopa-Modified Multiwalled Carbon Nanotubes

2012 ◽  
Vol 184-185 ◽  
pp. 1289-1293
Author(s):  
Lu Zhi Wang ◽  
Lin Yu ◽  
Xiao Ling Cheng ◽  
Jun He ◽  
Le Jia Lin ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Photoelectron Spectroscopy ◽  
Multiwalled Carbon ◽  
X Ray ◽  
Multiwalled Nanotubes ◽  
Mixed Acid ◽  
Transmission Electron ◽  
Ft Ir ◽  
And Performance

The Dopamine-modified multiwalled carbon nanotubes (MWNT-Dopa) were synthesized by chemical reaction between dopamine (Dopa) and multiwalled carbon nanotubes which oxidazed by mixed-acid (MWNT-COOH). The structure of MWNT-Dopa were analyzed by Fourier transform infrared spectroscopy (FT-IR), Thermogravimetric (TG), Transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS) techniques and the dispersity of MWNT-Dopa were studied by Dispersion stability analyzer. The results show that dopamine has been grafted on multiwalled carbon nanotubes successfully, and a dopamine layer which wraps on the surface of multiwalled nanotubes make multiwalled nanotubes have outstanding dispersity in water.

scholarly journals Kinetics of scandium ion sorption onto oxidized carbon nanotubes

2019 ◽  
Vol 150 (9) ◽  
pp. 1569-1572 ◽  
Author(s):  
Mateusz Pęgier ◽  
Krzysztof Kilian ◽  
Krystyna Pyrzynska
Keyword(s):  
Carbon Nanotubes ◽  
Ion Sorption ◽  
Oxidized Carbon ◽  
Oxidized Carbon Nanotubes ◽  
Kinetics Of
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