scholarly journals Gelation of uranyl ions and gel-derived uranium oxide nanoparticles for gas sensing

2020 ◽  
Vol 2 (6) ◽  
pp. 2478-2484
Author(s):  
Li Ding ◽  
Jennifer Leduc ◽  
Thomas Fischer ◽  
Sanjay Mathur ◽  
Yan Li
Keyword(s):  
Ethylene Glycol ◽  
Uranium Oxide ◽  
Gas Sensing ◽  
Oxide Nanoparticles ◽  
Uranyl Ions ◽  
Microwave Reaction

Gas sensing uranium oxide nanoparticles were synthesized by microwave reaction based on uranyl-ethylene-glycol gel.

Cetyltrimethylammonium bromide- and ethylene glycol-assisted preparation of mono-dispersed indium oxide nanoparticles using hydrothermal method

2014 ◽  
Vol 68 (8) ◽  
Author(s):  
Selvakumar Dhanasingh ◽  
Dharmaraj Nallasamy ◽  
Saravanan Padmanapan ◽  
Vinod Padaki
Keyword(s):  
Ethylene Glycol ◽  
Hydrothermal Method ◽  
Indium Oxide ◽  
Cetyltrimethylammonium Bromide ◽  
Oxide Nanoparticles ◽  
X Ray Diffraction ◽  
Hydrothermal Conditions ◽  
X Ray ◽  
Transmission Electron ◽  
Diffraction Patterns

AbstractThe influence of cetyltrimethylammonium bromide and ethylene glycol on the size and dispersion of indium oxide nanoparticles prepared under hydrothermal conditions was investigated. The precursor compound, indium hydroxide, obtained by the hydrothermal method in the absence as well as the presence of cetyltrimethylammonium bromide, was converted to indium oxide by sintering at 400°C. The formation of nanoscale indium oxide upon sintering was ascertained by the characteristic infrared adsorption bands and X-ray diffraction patterns of indium oxide. Transmission electron microscopy and band gap values confirmed that the cetyltrimethylammonium bromide facilitated the formation of indium oxide nanoparticles smaller in size and narrower in distribution than those prepared without the assistance of cetyltrimethylammonium bromide.

Network-like arrangement of mixed-valence uranium oxide nanoparticles after glutathione-induced reduction of uranium(vi)

2018 ◽  
Vol 54 (63) ◽  
pp. 8697-8700 ◽  
Author(s):  
Jerome Kretzschmar ◽  
Toni Haubitz ◽  
René Hübner ◽  
Stephan Weiss ◽  
Richard Husar ◽  
...  
Keyword(s):  
Uranium Oxide ◽  
Mixed Valence ◽  
Building Blocks ◽  
Oxide Nanoparticles ◽  
Neutral Conditions

2–5 nm UO2+x nanocrystals yielded under near-neutral conditions arrange as 20–40 nm chain-like building blocks, and finally form network-like aggregates.

scholarly journals Ethylene Glycol Functionalized Gadolinium Oxide Nanoparticles as a Potential Electrochemical Sensing Platform for Hydrazine and p-Nitrophenol

Coatings ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 633 ◽  
Author(s):  
Chaudhary ◽  
Kumar ◽  
Kumar ◽  
Chaudhary ◽  
Mehta ◽  
...  
Keyword(s):  
Detection Limit ◽  
Ethylene Glycol ◽  
Environmental Pollutants ◽  
Gadolinium Oxide ◽  
Linear Range ◽  
Electrochemical Sensing ◽  
Oxide Nanoparticles ◽  
Sensing Platform ◽  
Gd2o3 Nanoparticles ◽  
Gadolinium Oxide Nanoparticles

The current work reports the successful synthesis of ethylene glycol functionalized gadolinium oxide nanoparticles (Gd2O3 Nps) as a proficient electrocatalytic material for the detection of hydrazine and p-nitrophenol. A facile hydrothermal approach was used for the controlled growth of Gd2O3 Nps in the presence of ethylene glycol (EG) as a structure-controlling and hydrophilic coating source. The prepared material was characterized by several techniques in order to examine the structural, morphological, optical, photoluminescence, and sensing properties. The thermal stability, resistance toward corrosion, and decreased tendency toward photobleaching made Gd2O3 nanoparticles a good candidate for the electrochemical sensing of p-nitrophenol and hydrazine by using cyclic voltammetric (CV) and amperometric methods at a neutral pH range. The modified electrode possesses a linear range of 1 to 10 µM with a low detection limit of 1.527 and 0.704 µM for p-nitrophenol and hydrazine, respectively. The sensitivity, selectivity, repeatability, recyclability, linear range, detection limit, and applicability in real water samples made Gd2O3 Nps a favorable nanomaterial for the rapid and effectual scrutiny of harmful environmental pollutants.

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.

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.

Viscosity of copper oxide nanoparticles dispersed in ethylene glycol and water mixture

2007 ◽  
Vol 32 (2) ◽  
pp. 397-402 ◽  
Author(s):  
Praveen K. Namburu ◽  
Devdatta P. Kulkarni ◽  
Debasmita Misra ◽  
Debendra K. Das
Keyword(s):  
Ethylene Glycol ◽  
Copper Oxide ◽  
Copper Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Water Mixture
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