Efficient catalytic removal of airborne ozone under ambient conditions over manganese oxides immobilized on carbon nanotubes

2019 ◽  
Vol 9 (15) ◽  
pp. 4036-4046 ◽  
Author(s):  
Jian Ji ◽  
Yang Fang ◽  
Linsong He ◽  
Haibao Huang
Keyword(s):  
Carbon Nanotubes ◽  
Electron Transfer ◽  
Manganese Oxides ◽  
Ozone Decomposition ◽  
Ambient Conditions ◽  
Catalytic Removal

MnOx–CNT nanocomposites are efficient towards ozone decomposition owing to the electron transfer from the CNTs to MnOx that facilitates the activation of ozone.

A Sonochemical Route to Single-Walled Carbon Nanotubes under Ambient Conditions

2004 ◽  
Vol 126 (49) ◽  
pp. 15982-15983 ◽  
Author(s):  
Soo-Hwan Jeong ◽  
Ju-Hye Ko ◽  
Jong-Bong Park ◽  
Wanjun Park
Keyword(s):  
Carbon Nanotubes ◽  
Single Walled Carbon Nanotubes ◽  
Ambient Conditions ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

Resonant Laser-Induced Formation of Double-Walled Carbon Nanotubes from Peapods under Ambient Conditions

Small ◽  
2012 ◽  
Vol 8 (13) ◽  
pp. 2045-2052 ◽  
Author(s):  
Mourad Berd ◽  
Pascal Puech ◽  
Ariete Righi ◽  
Arezki Benfdila ◽  
Marc Monthioux
Keyword(s):  
Carbon Nanotubes ◽  
Ambient Conditions ◽  
Resonant Laser ◽  
Double Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Deformation of polyiodides in Cs2I8 crystals at high pressure

2021 ◽  
Vol 77 (6) ◽  
Author(s):  
Tomasz Poreba ◽  
Gaston Garbarino ◽  
Davide Comboni ◽  
Mohamed Mezouar
Keyword(s):  
High Pressure ◽  
Electron Transfer ◽  
Bulk Modulus ◽  
Electronic Properties ◽  
Supramolecular Architecture ◽  
Ambient Conditions ◽  
Electron Transfer Mechanism ◽  
Covalently Bonded ◽  
Potential Sources ◽  
High Bulk

Dicaesium octaiodide is composed of layers of zigzag polyiodide units (I8 2−) intercalated with caesium cations. Each I8 2− unit is built of two triiodides bridged with one diiodine molecules. This system was subjected to compression up to 5.9 GPa under hydrostatic conditions. Pressure alters the supramolecular architecture around I8 2−, leading to bending of the triiodide units away from their energetically preferred geometry (D ∞h). Short I2...I3 − contacts compress significantly, reaching lengths typical for the covalently bonded polyiodides. Unlike in reported structures at ambient conditions, pressure-induced catenation proceeds without symmetrization of the polyiodides, pointing to a different electron-transfer mechanism. The structure is shown to be half as compressible [B0 = 12.9 (4) GPa] than the similar CsI3 structure. The high bulk modulus is associated with higher I—I connectivity and a more compact cationic net, than in CsI3. The small discontinuity in the compressibility trend around 3 GPa suggests formation of more covalent I—I bonds. The potential sources of this discontinuity and its implication on the electronic properties of Cs2I8 are discussed.

scholarly journals Manganese Deposition Content in Carbon Nanotubes Based Filters: Energy Dispersive X-ray and Rutherford Backscatter Spectrometry Investigations

2021 ◽  
pp. 108-116
Author(s):  
Emad M. Elsehly
Keyword(s):  
Carbon Nanotubes ◽  
Manganese Content ◽  
Energy Dispersive ◽  
Rutherford Backscatter Spectrometry ◽  
Manganese Concentration ◽  
Diameter Distribution ◽  
Ambient Conditions ◽  
Solution Ph ◽  
X Ray ◽  
Functionalized Mwcnts

Carbon nanotubes (CNTs) based filters have a prospective advantage compared to the commercial filters due to their lightweight and ability to work without electricity or heat. The manganese (Mn) removal from aqueous solutions by oxidized multi-walled carbon nanotubes (O-MWCNTs) was investigated. The filtration performance was studied under ambient conditions: the solution pH, the initial manganese concentration, and the MWCNT-filter mass. The samples of MWCNT-filters were investigated using energy dispersive X-ray spectroscopy (EDS) and rutherford backscatter spectrometry (RBS) to account for the manganese content within the MWCNT-filter. These techniques were conducted to study the oxidation effect on the morphology of MWCNTs and evaluate the oxygen functional groups and the average diameter distribution. Based on these examinations, the competence of Mn removal may exceed 91% for 50 ppm initial concentration of Mn, proposing that functionalized MWCNTs is a promising filter. The Mn removal was achieved at low pH with removal enhancement at the pH of 2. Functionalized MWCNTs based filters are promising candidate for heavy metal ions removal from industrial wastewater.

Exploring efficient manganese oxides catalyst for ozone decomposition and its deactivation induced by water vapor

2021 ◽  
Author(s):  
Jian Chen ◽  
Chentao Fang ◽  
Dandan Li ◽  
Xufang Wang ◽  
Yuejuan Wang ◽  
...  
Keyword(s):  
Water Vapor ◽  
Manganese Oxides ◽  
Nitrogen Atmosphere ◽  
Manganese Acetate ◽  
Carbon Sphere ◽  
Ozone Decomposition ◽  
Carbon Spheres

A series of MnOx catalysts supported by carbon sphere were prepared by calcining mixtures of manganese acetate and carbon spheres under nitrogen atmosphere, and their performances for ozone decomposition under...

scholarly journals Glucose Oxidase Immobilized on a Functional Polymer Modified Glassy Carbon Electrode and Its Molecule Recognition of Glucose

Polymers ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 115 ◽  
Author(s):  
Yan-Na Ning ◽  
Bao-Lin Xiao ◽  
Nan-Nan Niu ◽  
Ali Moosavi-Movahedi ◽  
Jun Hong
Keyword(s):  
Carbon Nanotubes ◽  
Electron Transfer ◽  
Glucose Oxidase ◽  
Glassy Carbon Electrode ◽  
Glassy Carbon ◽  
Carbon Electrode ◽  
Modified Glassy Carbon Electrode ◽  
Functional Polymer ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

In the present study, a glucose oxidase (GluOx) direct electron transfer was realized on an aminated polyethylene glycol (mPEG), carboxylic acid functionalized multi-walled carbon nanotubes (fMWCNTs), and ionic liquid (IL) composite functional polymer modified glassy carbon electrode (GCE). The amino groups in PEG, carboxyl groups in multi-walled carbon nanotubes, and IL may have a better synergistic effect, thus more effectively adjust the hydrophobicity, stability, conductivity, and biocompatibility of the composite functional polymer film. The composite polymer membranes were characterized by cyclic voltammetry (CV), ultraviolet-visible (UV-Vis) spectrophotometer, fluorescence spectroscopy, electrochemical impedance spectroscopy (EIS), and transmission electron microscopy (TEM), respectively. In 50 mM, pH 7.0 phosphate buffer solution, the formal potential and heterogeneous electron transfer constant (ks) of GluOx on the composite functional polymer modified GCE were −0.27 V and 6.5 s−1, respectively. The modified electrode could recognize and detect glucose linearly in the range of 20 to 950 μM with a detection limit of 0.2 μM. The apparent Michaelis-Menten constant (Kmapp) of the modified electrode was 143 μM. The IL/mPEG-fMWCNTs functional polymer could preserve the conformational structure and catalytic activity of GluOx and lead to high sensitivity, stability, and selectivity of the biosensors for glucose recognition and detection.

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