scholarly journals Effect of Functionalized Carbon Nanotubes in the Detection of Benzene at Room Temperature

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Nurjahirah Janudin ◽  
Norli Abdullah ◽  
Wan Md Zin Wan Yunus ◽  
Faizah Md Yasin ◽  
Mohd Hanif Yaacob ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Acid Treatment ◽  
Room Temperature ◽  
Functional Group ◽  
Group Performance ◽  
Active Area ◽  
Functionalized Carbon Nanotubes ◽  
Sensing Material

In this paper, carbon nanotubes (CNTs) were functionalized by acid treatment and further functionalized with dodecylamine and were designated as CNT-carboxylic and CNT-amide, respectively. Then, functionalized CNTs produced were characterized with various methods to verify the attachment of a functional group. Performance of the functionalized CNTs in the detection of benzene gas was monitored at room temperature. The sample was dropped cast on the interdigitated transducer (IDT), and the changes in resistivity were recorded by a digital multimeter in a customized chamber under controlled humidity (∼55%) environment. Based on the findings, it showed that the functionalized CNTs provide an extra active area for interaction between the gas analyte and CNTs, thus increasing their response and improving the sensitivity of the sensing material.

Highly Selective Oxidation Monosaccharides to Sugar Acids at Room Temperature over Palladium Supported on Surface Functionalized Carbon Nanotubes

2021 ◽  
Author(s):  
Zengyong Li ◽  
Di Li ◽  
Wu Lan ◽  
Xuehui Li ◽  
Xiaofang Wan ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Selective Oxidation ◽  
Room Temperature ◽  
Efficient Catalyst ◽  
Functionalized Carbon Nanotubes

Selective oxidation of monosaccharides into sugar acids is an important reaction for the production of biomass-based chemicals, but the design of efficient catalyst remains a big challenge. Herein, we report...

The synthesis of functionalized carbon nanotubes by hyperbranched poly(amine-ester) with liquid-like behavior at room temperature

Polymer ◽  
2009 ◽  
Vol 50 (13) ◽  
pp. 2953-2957 ◽  
Author(s):  
Jiaoxia Zhang ◽  
Yaping Zheng ◽  
Peiying Yu ◽  
Su Mo ◽  
Rumin Wang
Keyword(s):  
Carbon Nanotubes ◽  
Room Temperature ◽  
Functionalized Carbon Nanotubes ◽  
Hyperbranched Poly

Mechanochemical Treated Multi-Walled Carbon Nanotubes for Incorporation of Metal Ions

2008 ◽  
Vol 55-57 ◽  
pp. 537-540 ◽  
Author(s):  
U. Rinzin ◽  
Pisith Singjai ◽  
P. Wilairat ◽  
S. Meejoo
Keyword(s):  
Carbon Nanotubes ◽  
Metal Ions ◽  
Acid Treatment ◽  
Room Temperature ◽  
Ni Catalyst ◽  
Linear Least Squares ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Best Fit ◽  
Tubular Form

Ni catalyst was removed from as received multi-walled Carbon Nanotubes (MWNTs) by acid treatment. Then, the nanotubes were treated with 4M HCl during a ball milling processing yielding mechanochemical treated MWNTs (mech-MWNTs). TEM micrographs indicate that the mech-MWNTs were still of a tubular form but with much shorter length. The equilibrium adsorption of metal ions, e.g Cu2+ and Ni2+, on the mech-MWNTs was investigated at room temperature. The adsorption isotherms gave excellent consistence with the Langmuir theory and the best fit values of K-1 and Κmax can be evaluated using non-linear least-squares. As results, the maximum of Cu2+ and Ni2+ ions uptake on to the mech-MWNTs are 0.93 ± 0.004 mg/g and 2.11 ± 0.01 mg/g respectively. There is no evidence indicating that the pore structure and layer surfaces at both ends of the mech-MWNTs are appropriate sites for metal ions adsorption.

scholarly journals Synthesis of oxygen functionalized carbon nanotubes and their application for selective catalytic reduction of NOx with NH3

RSC Advances ◽  
2020 ◽  
Vol 10 (28) ◽  
pp. 16700-16708 ◽  
Author(s):  
Bora Ye ◽  
Sun-I Kim ◽  
Minwoo Lee ◽  
Mohammadamin Ezazi ◽  
Hong-Dae Kim ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Selective Catalytic Reduction ◽  
Acid Treatment ◽  
Catalytic Reduction ◽  
Active Materials ◽  
Functionalized Carbon Nanotubes ◽  
Dispersion Properties ◽  
Reduction Of Nox

Oxygen functionalized carbon nanotubes synthesized by surface acid treatment were used to improve the dispersion properties of active materials for catalysis.

scholarly journals Synthesis of Phosphonated Carbon Nanotubes: New Insight into Carbon Nanotubes Functionalization

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2726
Author(s):  
Małgorzata Nadolska ◽  
Marta Prześniak-Welenc ◽  
Marcin Łapiński ◽  
Kamila Sadowska
Keyword(s):  
Carbon Nanotubes ◽  
Photoelectron Spectroscopy ◽  
Room Temperature ◽  
Spectroscopy Analysis ◽  
Functionalized Carbon Nanotubes ◽  
X Ray ◽  
Uv Illumination ◽  
First Time ◽  
Insight Into ◽  
Microscopic Surface

Carbon nanotubes were successfully functionalized for the first time in a free radical phosphonylation reaction. Three synthetic protocols were proposed. Carbon nanotubes and diethylphosphite reacted in the presence of known radical initiator, such as azobisisobutyronitrile, single electron oxidant—Mn(OAc)3, or under UV radiation. The functionalized material was fully characterized by means of spectroscopic methods, together with microscopic, surface area and thermogravimetric analyses. UV-illumination was found to be the most effective approach for introducing phosphonates onto carbon nanotubes. X-ray photoelectron spectroscopy analysis showed 6% phosphorus in this sample. Moreover, the method was performed at room temperature for only one hour, using diethylphosphite as a reactant and as a solvent. The functionalized carbon nanotubes showed an improved thermal stability, with a decomposition onset temperature increase of more than 130 °C. This makes it very promising material for flame retarding applications.

Multi-Walled Carbon Nanotubes Functionalized with Carboxyl and Amide for Acetone detection at Room Temperature

2021 ◽  
Vol 317 ◽  
pp. 195-201
Author(s):  
Nurjahirah Janudin ◽  
Norli Abdullah ◽  
Faizah Md Yasin ◽  
Mohd Hanif Yaacob ◽  
Muhammad Zamharir Ahmad ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Response Time ◽  
Recovery Time ◽  
Room Temperature ◽  
Functional Group ◽  
Compositional Analysis ◽  
X Ray ◽  
Multi Walled Carbon Nanotubes ◽  
Acetone Detection ◽  
Walled Carbon Nanotubes

The functionalization of multi-walled carbon nanotubes (CNT) with amide group is reported as an alternative to enhance response time, recovery time and sensitivity of detecting acetone gas. We have fabricated an interdigitated transducer (IDT) deposited with amide-functionalized CNT. The elemental compositional analysis was characterized using Energy Dispersion X-ray spectroscopy and CHNOS elemental analyzer. The detection of acetone gas was performed in room temperature and digital multimeter was employed to record the changes of resistivity of IDT upon exposure of acetone. Results showed that amide functional group increases sensitivity, shortens the response time as well as recovery time of the sensor.

Sulfur dioxide gas-sensitive materials based on zeolitic imidazolate framework-derived carbon nanotubes

2018 ◽  
Vol 6 (25) ◽  
pp. 12115-12124 ◽  
Author(s):  
Qun Li ◽  
Jiabin Wu ◽  
Liang Huang ◽  
Junfeng Gao ◽  
Haowen Zhou ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Sulfur Dioxide ◽  
Room Temperature ◽  
Gas Sensing ◽  
Zeolitic Imidazolate Framework ◽  
Sensing Material

An active and stable gas-sensing material for SO2 at room temperature is presented. The particles synthesized using zinc-doped ZIFs as the precursor exhibit a porous polyhedral morphology with abundant interconnecting carbon nanotubes on the surface and improved conductivity.

Fast and Selective Room-Temperature Ammonia Sensors Using Silver Nanocrystal-Functionalized Carbon Nanotubes

2012 ◽  
Vol 4 (9) ◽  
pp. 4898-4904 ◽  
Author(s):  
Shumao Cui ◽  
Haihui Pu ◽  
Ganhua Lu ◽  
Zhenhai Wen ◽  
Eric C. Mattson ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Room Temperature ◽  
Functionalized Carbon Nanotubes ◽  
Ammonia Sensors
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