Enhancing oxygen adsorption capabilities in Li–O2battery cathodes through solid perfluorocarbons

2017 ◽  
Vol 5 (27) ◽  
pp. 14152-14164 ◽  
Author(s):  
Moran Balaish ◽  
Yair Ein-Eli
Keyword(s):  
Carbon Black ◽  
Room Temperature ◽  
Nitrogen Adsorption ◽  
Oxygen Adsorption ◽  
Electrochemical Investigation ◽  
Liquid Adsorption

Perfluorocarbons, solid at room temperature, were added at different weight ratios to carbon black-based air electrodes for Li–O2battery. PFCs-modified air-electrodes showed improved battery performance and were characterized by HRSEM images, nitrogen adsorption (BET), liquid adsorption, a comprehensive wettability study and electrochemical investigation.

PERMEABILITY STUDIES: III. SURFACE AREA MEASUREMENTS OF CARBON BLACKS

1948 ◽  
Vol 26a (2) ◽  
pp. 29-38 ◽  
Author(s):  
J. C. Arnell ◽  
G. O. Henneberry
Keyword(s):  
Electron Microscope ◽  
Low Temperature ◽  
Carbon Black ◽  
Surface Area ◽  
Satisfactory Agreement ◽  
Nitrogen Adsorption ◽  
Average Particle ◽  
Carbon Blacks ◽  
Permeability Studies ◽  
Nitrogen Adsorption Isotherms

The modified Kozeny equation has been found to be satisfactory for the measurement of the specific surfaces of carbon blacks having average particle diameters ranging from 0.01 to 0.1 μ to within ±10%. Comparative data were obtained from electron microscope counting and from low temperature nitrogen adsorption isotherms. The three methods examined gave results that were in satisfactory agreement, except when the carbon black was porous, and then the adsorption value was extremely large.

Magnesium Aluminate Nanoparticles for Chemical Detoxification of Sarin and Soman

2020 ◽  
Vol 20 (6) ◽  
pp. 3547-3553
Author(s):  
G. K. Prasad ◽  
L. K. Pandey ◽  
J. Praveen Kumar ◽  
K. Ganesan ◽  
J. Acharya ◽  
...  
Keyword(s):  
Particle Size ◽  
Spinel Structure ◽  
Room Temperature ◽  
Chemical Warfare Agents ◽  
Nitrogen Adsorption ◽  
Chemical Warfare ◽  
Magnesium Aluminate ◽  
Nitrogen Adsorption Isotherm ◽  
Type Iv ◽  
Warfare Agents

The solutions of Mg(NO3)2, Al(NO3)3, and (NH4)2CO3 were mixed at pH 8 and then heated at 95 °C for 4 h, aged at room temperature for 16 h, and calcined at 650 °C for 4 h to obtain magnesium aluminate nanoparticles. The obtained materials exhibited spinel structure with the particle size being 6 to 26 nm. The nanoparticles demonstrated type IV nitrogen adsorption isotherm, typical of mesoporosity with a surface area of 325 m2/g. They were utilized for studies on chemical detoxification of deadly chemical warfare agents such as sarin and soman. Our results showed that the magnesium aluminate nanoparticles effectively decontaminated more than 99% of sarin and soman within 8–10 min when used at a ratio of 1:50–60% w/w.

The ability of a fibrous titanium oxophosphate for nitrogen-adsorption above room temperature

2017 ◽  
Vol 53 (14) ◽  
pp. 2249-2251
Author(s):  
Jorge García-Glez ◽  
Zakariae Amghouz ◽  
Iván da Silva ◽  
Conchi O. Ania ◽  
José B. Parra ◽  
...  
Keyword(s):  
Nitrogen Fixation ◽  
Structural Change ◽  
Ambient Temperature ◽  
Room Temperature ◽  
Inorganic Material ◽  
Nitrogen Adsorption

Nitrogen-fixation by an inorganic material at above-ambient temperature provoked by a structural change.

Carbon black/octadecane composites for room temperature electrical and thermal regulation

Carbon ◽  
2015 ◽  
Vol 94 ◽  
pp. 417-423 ◽  
Author(s):  
Yulong Wu ◽  
Xiaolu Yan ◽  
Peng Meng ◽  
Pengcheng Sun ◽  
Guoan Cheng ◽  
...  
Keyword(s):  
Carbon Black ◽  
Room Temperature ◽  
Thermal Regulation

Carbon Black Surface Areas by the Harkins and Jura Absolute Method

1967 ◽  
Vol 40 (5) ◽  
pp. 1305-1310 ◽  
Author(s):  
G. Kraus ◽  
K. W. Rollmann
Keyword(s):  
Particle Size ◽  
Carbon Black ◽  
Surface Area ◽  
Nitrogen Adsorption ◽  
Absolute Method ◽  
Carbon Blacks ◽  
Surface Areas ◽  
Particle Size Determination ◽  
Light Reflectance ◽  
Adsorption Surface

Abstract The Harkins and Jura (HJ) absolute method of surface area determination (Harkins and Jura, J. Am. Chem. Soc. 66, 919, 1944) has been applied to a large number of carbon blacks. Surface area is calculated from the heat of immersion of the solid powder covered by a preadsorbed multilayer of the immersion liquid. For non-porous carbon blacks good agreement with nitrogen adsorption surface areas is obtained, but with porous blacks the HJ method gives smaller values since micropores are filled and bridged over by the pre-adsorbed film. Thus the HJ areas are more nearly representative of particle size and may be used to calibrate indirect methods of particle size determination. An example of this is shown using light reflectance values on dry carbon black and possible complications due to particle size distribution in the use of the reflectance test are discussed.

Bonding of Rubber to Carbon Black by Sulfur Vulcanization

1968 ◽  
Vol 41 (2) ◽  
pp. 330-343 ◽  
Author(s):  
D. Rivin ◽  
J. Aron ◽  
A. I. Medalia
Keyword(s):  
Carbon Black ◽  
Room Temperature ◽  
Rate Determining Step ◽  
Sulfur Vulcanization ◽  
Carbon Black Surface ◽  
Black Surface ◽  
The Stability ◽  
Translational Entropy ◽  
Sulfur Curing

Abstract As an approach toward understanding the interaction of rubber with carbon black, we have studied the chemisorption of a model olefin (2-methyl-2-octene) on carbon black. Some olefin becomes chemisorbed on simply heating these two materials together, and can be distinguished from physically adsorbed material by its resistance to removal by solvents at room temperature. The presence of an MBTS accelerated sulfur curing system causes additional chemisorption. The amount of olefin chemisorbed can also be increased by the use of larger amounts of sulfur but is decreased by an increase in MBTS, owing to competitive chemisorption of the MBTS. Sulfur is also chemisorbed, to a somewhat greater extent than the olefin, but is desorbed more readily than the olefin, suggesting that these two components are chemisorbed separately. The chemisorbed olefin is believed to be highly mobile on the carbon black surface, and indeed its stability is ascribed primarily to a loss of translational entropy associated with the rate-determining step in desorption. The curing system decreases the stability of the chemisorbed olefin, apparently due to the formation of localized bonds which decrease the translational entropy of the olefin.

Electrochemical investigation of graphene/nanoporous carbon black for supercapacitors

2015 ◽  
Vol 33 ◽  
pp. 89-93 ◽  
Author(s):  
Mahdi Robat Sarpoushi ◽  
Mahdi Nasibi ◽  
Masoud Moshrefifar ◽  
Mohammad Mazloum-Ardakani ◽  
Zaki Ahmad ◽  
...  
Keyword(s):  
Carbon Black ◽  
Nanoporous Carbon ◽  
Electrochemical Investigation

scholarly journals Ultrasound-Assisted Rapid ZIF-8 Synthesis, Porous ZnO Preparation by Heating ZIF-8, and Their Photocatalytic Activity

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Pham Dinh Du ◽  
Nguyen Trung Hieu ◽  
Tran Vinh Thien
Keyword(s):  
Photocatalytic Activity ◽  
Room Temperature ◽  
Diffuse Reflectance ◽  
Nitrogen Adsorption ◽  
X Ray Diffraction ◽  
Zeolitic Imidazolate Framework ◽  
X Ray ◽  
Photocatalytic Activities ◽  
Ft Ir ◽  
Adsorption Desorption

Zeolitic imidazolate framework-8 (ZIF-8) is synthesized quickly at room temperature in methanol with the support of ultrasound. Porous ZnO is also prepared via the thermal treatment of ZIF-8. The photocatalytic activities of the obtained materials are demonstrated via methylene blue (MB) decomposition under UV radiation. The obtained materials are characterized by means of X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), nitrogen adsorption/desorption isotherms, UV-Vis diffuse reflectance spectra (DR-UV-Vis), and photoluminescence spectra. The results indicate that ZIF-8 and the materials obtained from ZIF-8 by heating in the air have photocatalytic activity under UV irradiation. The ZnO sample obtained by ZIF-8 calcination at 660°C for 5 h has the highest photocatalytic activity. However, the MB degradation photocatalytic efficiency of the ZnO samples is even lower than that of the ZIF-8 samples, indicating that ZIF-8 is an effective photocatalyst in the treatment of environmental pollution.

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