scholarly journals Adsorption of Sulfamethazine Drug onto the Modified Derivatives of Carbon Nanotubes at Different pH

Molecules ◽  
2020 ◽  
Vol 25 (11) ◽  
pp. 2489 ◽  
Author(s):  
Hiba Mohamed Ameen ◽  
Sándor Kunsági-Máté ◽  
Péter Noveczky ◽  
Lajos Szente ◽  
Beáta Lemli
Keyword(s):  
Carbon Nanotubes ◽  
Drug Interaction ◽  
Carbon Nanotube ◽  
Adsorption Capacity ◽  
Removal Efficiency ◽  
Adsorption Process ◽  
Single Walled Carbon Nanotubes ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Derivatives Of

The sulfamethazine drug interaction with carbon nanotubes was investigated with the aim of improving the adsorption capacity of the adsorptive materials. Experiments were performed to clarify how the molecular environment affects the adsorption process. Single-walled carbon nanotubes have a higher removal efficiency of sulfamethazine than pristine or functionalized multi-walled carbon nanotubes. Although the presence of cyclodextrin molecules improves the solubility of sulfamethazine, it reduces the adsorption capacity of the carbon nanotube towards the sulfamethazine drug and, therefore, inhibits the removal of these antibiotic pollutants from waters by carbon nanotubes.

scholarly journals Effective Modulus of Single- and Multi-Walled Carbon Nanotubes in Melt-Compounded Polycarbonate Nanocomposites

2010 ◽  
Vol 19 (5) ◽  
pp. 096369351001900 ◽  
Author(s):  
Zhujuan Wang ◽  
Emiliano Bilotti ◽  
Ton Peijs
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Single Walled Carbon Nanotubes ◽  
Mechanical Analysis ◽  
Effective Moduli ◽  
Melt Compounding ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Nanofiller Content ◽  
Composite Properties

This study compares the reinforcing efficiency of multi-walled carbon nanotubes (MWNTs) and single-walled carbon nanotubes (SWNTs) in polycarbonate (PC) films processed using melt-compounding followed by hot-pressing. The effect of carbon nanotube (CNT) type on composite properties is studied by means of dynamic mechanical analysis (DMA). Composite theory is used to analyse the results. It is found that, despite the good dispersion and interfacial interactions reported in the literature for PC/CNT nanocomposites, SWNTs and MWNTs efficiently reinforce PC only at nanofiller contents below 0.3 wt.% and 0.5 wt.%, respectively. Nevertheless, effective moduli of CNTs (in particular SWNT) close to the theoretical values were achieved for low nanofiller content.

The Effect of Density and Surface Area on Carbon Nanotube Capacitive Sensors for Dimethyl Methylphosphonate Detection

2012 ◽  
Vol 531-532 ◽  
pp. 519-522
Author(s):  
Hong Jun Jing ◽  
Ya Dong Jiang ◽  
Xiao Song Du
Keyword(s):  
Thin Films ◽  
Carbon Nanotubes ◽  
Electron Microscope ◽  
Carbon Nanotube ◽  
Single Walled Carbon Nanotubes ◽  
Capacitive Sensors ◽  
Dimethyl Methylphosphonate ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Scanning Electron

Capacitive sensors for dimethyl methylphosphonate (DMMP) detection were prepared on interdigitated electrodes by airbrush process. Multi-walled carbon nanotubes (MWNTs) and single-walled carbon nanotubes (SWNTs) were used as the chemically sensitive materials, respectively. Different airbrush carbon nanotube thin films were observed and compared by field-emission scanning electron microscope. It indicated that the capacitance of airbrush MWNT sensor decreased immediately when exposed to DMMP and recovered rapidly when removed DMMP in the range of 12-60 mg/m3(2.4-12 ppm). The sensitivity of airbrush MWNT sensor was about -1.39% at the concentration of 12 mg/m3(2.4 ppm). It was obvious that the capacitance sensitivity was higher when the MWNTs were more and the film was denser by airbrush. It was also found that the capacitance sensitivity of airbrush SWNT sensor was higher than the corresponding airbrush MWNT sensor.

Effect of Expanded Temperature on Microstructure of Carbon Nanotubes/Expanded Graphite Composites

2013 ◽  
Vol 716 ◽  
pp. 373-378
Author(s):  
Qian Zhang ◽  
Xin Bao Gao ◽  
Tian Peng Li
Keyword(s):  
Carbon Nanotubes ◽  
Composite Material ◽  
High Temperature ◽  
Carbon Nanotube ◽  
Physical Adsorption ◽  
Expanded Graphite ◽  
Graphite Flake ◽  
Graphite Composite ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Carbon nanotube/expanded graphite composite material was prepared by expanding the mixture of multi-walled carbon nanotubes and expansible graphite under the condition of high temperature. The microstructure and composition was studied by using SEM and XRD. The study shows that the tubular structure of carbon nanotubes in the composite material is changed by high temperature expanding process, and the microstructure is different with different expanding temperature. When the expanding temperature was 900°C, carbon nanotubes transformed, then attached to the surface of expanded graphite flake, so carbon nanotubes and expanding graphite combined strongly; globular carbon nanotubes attached to the surface of expanded graphite flake at the temperature of 700°C, both were combined much more strongly; carbon nanotubes retained the tube structure at the temperature of 500°C, combination was looser due to the simple physical adsorption. The result shows that the choice of expanding temperature has an important effect on microstructure of carbon nanotube/expanded graphite composite material.

Lipase on carbon nanotube - An active, selective, stable and easy to optimize nanobiocatalyst for kinetic resolutions

2021 ◽  
Author(s):  
Cristian Andrei Gal ◽  
Laura Edit Barabas ◽  
Judith Hajnal Bartha-Vari ◽  
Madalina Elena Moisa ◽  
Diana Balogh-Weiser ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Covalent Binding ◽  
Single Walled Carbon Nanotubes ◽  
Candida Antarctica ◽  
Flow Mode ◽  
Lipase B ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes ◽  
Kinetic Resolutions

An efficient nanobioconjugate of lipase B from Candida antarctica was prepared by the covalent binding on carboxy-functionalized single-walled carbon nanotubes and tested in batch and flow mode for the enzymatic...

Diameter-Controlled Synthesis of Single-Walled Carbon Nanotubes

2013 ◽  
Vol 652-654 ◽  
pp. 151-154
Author(s):  
Ting Kai Zhao ◽  
Xing Zhao ◽  
Jin Yan ◽  
Li Du ◽  
Tie Hu Li
Keyword(s):  
Carbon Nanotubes ◽  
Single Walled Carbon Nanotubes ◽  
Recent Decade ◽  
Diameter Distribution ◽  
Future Directions ◽  
Single Walled Carbon ◽  
Existing Problems ◽  
Multi Walled Carbon Nanotubes ◽  
Synthesis Of Carbon Nanotubes ◽  
Walled Carbon Nanotubes

With the technological progress in the synthesis of multi-walled carbon nanotubes and single-walled carbon nanotubes, more attention was attracted to the synthesis of carbon nanotubes with diameter distribution, ideal length, different chirality and certain orientation. In recent decade, all these factors have been investigated and a number of progresses have been made for the application of carbon nanotubes. The latest researches on the growth of diameter-controlled single-walled carbon nanotubes are reviewed and discussed. The existing problems and challenges of the synthesis processes have been addressed in the future directions.

The Effect of Nanotube Loading and Dispersion on the Three-Dimensional Nanostructure of Carbon Nanotube-Conducting Polymer Composite Films

2002 ◽  
Vol 739 ◽  
Author(s):  
Mark Hughes ◽  
George Z. Chen ◽  
Milo S. P. Shaffer ◽  
Derek J. Fray ◽  
Alan H. Windle
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Conducting Polymer ◽  
Polymer Composite ◽  
Electrochemical Polymerization ◽  
Composite Films ◽  
Three Dimensional ◽  
Ionic Diffusion ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

ABSTRACTNanoporous composite films of multi-walled carbon nanotubes (MWNTs) and either polypyrrole (PPy) or poly(3-methylthiophene) (P3MeT) were grown using an electrochemical polymerization technique in which the nanotubes and conducting polymer were deposited simultaneously. The concentration and dispersion of MWNTs in the polymerization electrolyte was found to have a significant effect on the thickness of polymer coated on each MWNT and hence the loading of MWNTs in the films produced. It has been shown that for an increasing concentration of MWNTs in the polymerization electrolyte, the thickness of polymer coated on each MWNT decreases. This relationship made it possible to minimize ionic diffusion distances within the nanoporous MWNT-PPy films produced, reducing their electrical and ionic resistance and increasing their capacitance relative to similarly prepared pure PPy films.

The influence of functionalization time of carbon nanotube on the mechanical properties of the epoxy composites

2017 ◽  
Vol 51 (12) ◽  
pp. 1693-1701 ◽  
Author(s):  
EA Zakharychev ◽  
EN Razov ◽  
Yu D Semchikov ◽  
NS Zakharycheva ◽  
MA Kabina
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Tensile Strength ◽  
Elastic Modulus ◽  
Carbon Nanotube ◽  
Composite Materials ◽  
Polymer Composites ◽  
Epoxy Composites ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

This paper investigates the structure, length, and percentage of functional groups of multi-walled carbon nanotubes (CNT) depending on the time taken for functionalization in HNO3 and H2SO4 mixture. The carbon nanotube content and influence of functionalization time on mechanical properties of polymer composite materials based on epoxy matrix are studied. The extreme dependencies of mechanical properties of carbon nanotube functionalization time of polymer composites were established. The rise in tensile strength of obtained composites reaches 102% and elastic modulus reaches 227% as compared to that of unfilled polymer. The composites exhibited best mechanical properties by including carbon nanotube with 0.5 h functionalization time.

scholarly journals Switching the optical and electrical properties of carbon nanotube hybrid films using a photoresponsive dispersant as a dopant

RSC Advances ◽  
2018 ◽  
Vol 8 (20) ◽  
pp. 11186-11190 ◽  
Author(s):  
H. Jintoku ◽  
Y. Matsuzawa ◽  
M. Yoshida
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Electrical Properties ◽  
Single Walled Carbon Nanotubes ◽  
Optical And Electrical Properties ◽  
Hybrid Films ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

The light-induced switching of the optical and electrical properties of single-walled carbon nanotubes hybrid films with photoresponsive dispersant.

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