scholarly journals Gas Sensing with Iridium Oxide Nanoparticle Decorated Carbon Nanotubes

Sensors ◽  
2018 ◽  
Vol 19 (1) ◽  
pp. 113 ◽  
Author(s):  
Juan Casanova-Cháfer ◽  
Eric Navarrete ◽  
Xavier Noirfalise ◽  
Polona Umek ◽  
Carla Bittencourt ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Gas Sensing ◽  
Metal Oxide Nanoparticles ◽  
Iridium Oxide ◽  
Oxide Nanoparticles ◽  
Step Method ◽  
Experimental Conditions ◽  
Multi Wall Carbon Nanotubes ◽  
Condensation Growth ◽  
Oxide Nanoparticle

The properties of multi-wall carbon nanotubes decorated with iridium oxide nanoparticles (IrOx-MWCNTs) are studied to detect harmful gases such as nitrogen dioxide and ammonia. IrOx nanoparticles were synthetized using a two-step method, based on a hydrolysis and acid condensation growth mechanism. The metal oxide nanoparticles obtained were employed for decorating the sidewalls of carbon nanotubes. Iridium-oxide nanoparticle decorated carbon nanotube material showed higher and more stable responses towards NH3 and NO2 than bare carbon nanotubes under different experimental conditions, establishing the optimal operating temperatures and estimating the limits of detection and quantification. Furthermore, the nanomaterials employed were studied using different morphological and compositional characterization techniques and a gas sensing mechanism is proposed.

scholarly journals Gas Sensing Properties of Carbon Nanotubes Decorated with Iridium Oxide Nanoparticles

Proceedings ◽  
2018 ◽  
Vol 2 (13) ◽  
pp. 874 ◽  
Author(s):  
Juan Casanova-Cháfer ◽  
Èric Navarrete ◽  
Eduard Llobet
Keyword(s):  
Carbon Nanotubes ◽  
Gas Sensors ◽  
Gas Sensing ◽  
Iridium Oxide ◽  
Experimental Conditions ◽  
Multi Wall Carbon Nanotubes ◽  
Si Substrates ◽  
Condensation Growth ◽  
Gas Sensing Properties ◽  
Oxide Nanoparticle

The properties of Iridium oxide (IrO2) decorated Multi-Wall Carbon Nanotubes (IrO2-MWCNTs) are studied for detecting nitrogen dioxide and ammonia vapors. IrO2 nanoparticles were synthetized using a hydrolysis and acid condensation growth mechanism, and subsequently employed for decorating the sidewalls of carbon nanotubes. Decorated MWCNTs films were deposited onto SiO2/Si substrates for achieving chemoresistive gas sensors. NO2 and NH3 gases were detected under different experimental conditions. Higher and more stable responses towards NH3 and NO2 were observed for iridium-oxide nanoparticle decorated MWCNT material, compared to bare MWCNT material. Raman Spectroscopy was employed to study the nanomaterials and the optimal operating temperatures were determined.

Multiwall Carbon Nanotubes Decorated with Metal Oxide Nanoparticles for Gas Sensing Applications

2019 ◽  
Vol 23 (1) ◽  
pp. 237-242 ◽  
Author(s):  
Rogerio V. Gelamo ◽  
Ali Abbaspourrad ◽  
C. Verissimoa ◽  
Alfredo R. Vaz ◽  
F. P. Rouxinol ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Metal Oxide ◽  
Gas Sensing ◽  
Metal Oxide Nanoparticles ◽  
Multiwall Carbon Nanotubes ◽  
Oxide Nanoparticles ◽  
Sensing Applications ◽  
Multiwall Carbon

scholarly journals Parts per million CH4 chemoresistor sensors based on multi wall carbon nanotubes/metal-oxide nanoparticles

2016 ◽  
Author(s):  
Michela Sainato ◽  
Md Tanim Humayun ◽  
Lara Gundel ◽  
Paul Solomon ◽  
Liliana Stan ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Metal Oxide ◽  
Metal Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Multi Wall Carbon Nanotubes

Design of Covalently Functionalized Carbon Nanotubes Filled with Metal Oxide Nanoparticles for Imaging, Therapy, and Magnetic Manipulation

ACS Nano ◽  
2014 ◽  
Vol 8 (11) ◽  
pp. 11290-11304 ◽  
Author(s):  
Xiaojie Liu ◽  
Iris Marangon ◽  
Georgian Melinte ◽  
Claire Wilhelm ◽  
Cécilia Ménard-Moyon ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Metal Oxide ◽  
Metal Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Functionalized Carbon Nanotubes ◽  
Magnetic Manipulation

scholarly journals N-Dopant-Mediated Growth of Metal Oxide Nanoparticles on Carbon Nanotubes

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1882
Author(s):  
Jin Ah Lee ◽  
Won Jun Lee ◽  
Joonwon Lim ◽  
Sang Ouk Kim
Keyword(s):  
Carbon Nanotubes ◽  
Metal Oxide ◽  
Carbon Nanomaterials ◽  
Wide Spectrum ◽  
Metal Oxide Nanoparticles ◽  
Nucleation And Growth ◽  
Oxide Nanoparticles ◽  
Metal Oxide Nanoparticle ◽  
Nucleation Sites ◽  
Direct Growth

Metal oxide nanoparticles supported on heteroatom-doped graphitic surfaces have been pursued for several decades for a wide spectrum of applications. Despite extensive research on functional metal oxide nanoparticle/doped carbon nanomaterial hybrids, the role of the heteroatom dopant in the hybridization process of doped carbon nanomaterials has been overlooked. Here, the direct growth of MnOx and RuOx nanoparticles in nitrogen (N)-doped sites of carbon nanotubes (NCNTs) is presented. The quaternary nitrogen (NQ) sites of CNTs actively participate in the nucleation and growth of the metal nanoparticles. The evenly distributed NQ nucleation sites mediate the generation of uniformly dispersed <10 nm diameter MnOx and RuOx nanoparticles, directly decorated on NCNT surfaces. The electrochemical performance of the resultant hybridized materials was evaluated using cyclic voltammetry. This novel hybridization method using the dopant-mediated nucleation and growth of metal oxides suggests ways that heteroatom dopants can be utilized to optimize the structure, interface and corresponding properties of graphitic carbon-based hybrid materials.

Enhanced thermal conductivity by aggregation in heat transfer nanofluids containing metal oxide nanoparticles and carbon nanotubes

2008 ◽  
Vol 92 (2) ◽  
pp. 023110 ◽  
Author(s):  
Jesse Wensel ◽  
Brian Wright ◽  
Dustin Thomas ◽  
Wayne Douglas ◽  
Bert Mannhalter ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Thermal Conductivity ◽  
Carbon Nanotubes ◽  
Metal Oxide ◽  
Metal Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Enhanced Thermal Conductivity

scholarly journals Oxidative stress generated at nickel oxide nanoparticle interface results in bacterial membrane damage leading to cell death

RSC Advances ◽  
2019 ◽  
Vol 9 (43) ◽  
pp. 24888-24894 ◽  
Author(s):  
Nibedita Behera ◽  
Manoranjan Arakha ◽  
Mamali Priyadarshinee ◽  
Biraja S. Pattanayak ◽  
Siba Soren ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Cell Death ◽  
Nickel Oxide ◽  
Metal Oxide Nanoparticles ◽  
Membrane Damage ◽  
Oxide Nanoparticles ◽  
Bacterial Membrane ◽  
Antibacterial Effects ◽  
Nickel Oxide Nanoparticle ◽  
Oxide Nanoparticle

Metal oxide nanoparticles (NPs) have shown enhanced antibacterial effects against many bacteria.

scholarly journals Wet chemistry route for the decoration of carbon nanotubes with iron oxide nanoparticles for gas sensing

2019 ◽  
Vol 10 ◽  
pp. 105-118 ◽  
Author(s):  
Hussam M Elnabawy ◽  
Juan Casanova-Chafer ◽  
Badawi Anis ◽  
Mostafa Fedawy ◽  
Mattia Scardamaglia ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Gas Sensing ◽  
Oxide Nanoparticles ◽  
Silicon Substrates ◽  
Iron Salt ◽  
Multiwalled Carbon ◽  
Wet Chemistry ◽  
Gas Sensing Properties

In this work, we investigated the parameters for decorating multiwalled carbon nanotubes with iron oxide nanoparticles using a new, inexpensive approach based on wet chemistry. The effect of process parameters such as the solvent used, the amount of iron salt or the calcination time on the morphology, decoration density and nanocluster size were studied. With the proposed approach, the decoration density can be adjusted by selecting the appropriate ratio of carbon nanotubes/iron salt, while nanoparticle size can be modulated by controlling the calcination period. Pristine and iron-decorated carbon nanotubes were deposited on silicon substrates to investigate their gas sensing properties. It was found that loading with iron oxide nanoparticles substantially ameliorated the response towards nitrogen dioxide.

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