Revealing the sodium‐storage performance enhancement of adsorption‐type carbon materials after ammonia treatment: Active nitrogen dopants or specific surface area?

2020 ◽  
Author(s):  
Guangzhe Li ◽  
Yaoguang Yu ◽  
Bin Huang ◽  
Peilin Chen ◽  
Zongping Shao ◽  
...  
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Carbon Materials ◽  
Performance Enhancement ◽  
Ammonia Treatment ◽  
Active Nitrogen ◽  
Storage Performance ◽  
Sodium Storage

Achieving superb sodium storage performance on carbon anodes through an ether-derived solid electrolyte interphase

2017 ◽  
Vol 10 (1) ◽  
pp. 370-376 ◽  
Author(s):  
Jun Zhang ◽  
Da-Wei Wang ◽  
Wei Lv ◽  
Siwei Zhang ◽  
Qinghua Liang ◽  
...  
Keyword(s):  
Specific Surface ◽  
Solid Electrolyte ◽  
Surface Area ◽  
Specific Surface Area ◽  
Solid Electrolyte Interphase ◽  
High Specific Surface Area ◽  
Storage Performance ◽  
Carbon Anodes ◽  
Sodium Storage

Ether solvent is utilized to manipulate the SEI on high specific surface area carbon to enable achievement of superb sodium storage performance.

Increase the Microporosity and CO2 Adsorption of a Commercial Activated Carbon

2015 ◽  
Vol 749 ◽  
pp. 17-21 ◽  
Author(s):  
Joanna Sreńscek Nazzal ◽  
Karolina Glonek ◽  
Jacek Młodzik ◽  
Urszula Narkiewicz ◽  
Antoni W. Morawski ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Carbon Materials ◽  
Micropore Volume ◽  
Microporous Carbon ◽  
Microporous Carbons ◽  
Adsorption Capacities

Microporous carbons prepared from commercial activated carbon WG12 by KOH and/or ZnCl2 treatment were examined as adsorbents for CO2 capture. The micropore volume and specific surface area of the resulting carbons varied from 0.52 cm3/g (1374 m2/g) to 0.70 cm3/g (1800 m2/g), respectively. The obtained microporous carbon materials showed high CO2 adsorption capacities at 40 bar pressure reaching 16.4 mmol/g.

What are the practical limits for the specific surface area and capacitance of bulk sp2 carbon materials?

2015 ◽  
Vol 59 (2) ◽  
pp. 225-230 ◽  
Author(s):  
Yanhong Lu ◽  
Guankui Long ◽  
Long Zhang ◽  
Tengfei Zhang ◽  
Mingtao Zhang ◽  
...  
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Carbon Materials

Advances of Graphene for Adsorption of Dyes in Wastewater

2013 ◽  
Vol 804 ◽  
pp. 89-93
Author(s):  
Jing Yi Yang ◽  
Yu Qiong Chen ◽  
Ying Chuan Ma ◽  
Xin Zhang ◽  
Ling Ling Luo ◽  
...  
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Carbon Materials ◽  
High Specific Surface Area ◽  
High Thermal Stability ◽  
Charge Carriers ◽  
Functionalized Graphene ◽  
Covalently Bonded ◽  
Mobility Of Charge Carriers

Graphene is a fascinating new member of carbon materials with honeycomb and one-atom-thick structure, consisting of 2D hexagonal lattices of sp2 carbon atoms covalently bonded. Graphene has a huge theory specific surface area (over 2600 m2 g1), good thermal conductivity, high values of Youngs modulus and fracture strength, high thermal stability and chemical stability and fast mobility of charge carriers, etc.. In recent years, many researchers found graphene have outstanding adsorption capacity of dyes in aqueous solution due to its high specific surface area. This paper summarized the graphene, graphene oxide and functionalized graphene removing various dyes in wastewater.

Frontiers of carbon materials as capacitive deionization electrodes

2020 ◽  
Vol 49 (16) ◽  
pp. 5006-5014 ◽  
Author(s):  
Yuanyuan Li ◽  
Nan Chen ◽  
Zengling Li ◽  
Huibo Shao ◽  
Liangti Qu
Keyword(s):  
Carbon Nanotubes ◽  
Activated Carbon ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Carbon Materials ◽  
High Specific Surface Area ◽  
Carbon Aerogels ◽  
Capacitive Deionization

Carbon materials are widely used as capacitive deionization (CDI) electrodes due to their high specific surface area (SSA), superior conductivity, and better stability, including activated carbon, carbon aerogels, carbon nanotubes and graphene.

Nanoporous zero-valent iron

2005 ◽  
Vol 20 (12) ◽  
pp. 3238-3243 ◽  
Author(s):  
Jiasheng Cao ◽  
Patrick Clasen ◽  
Wei-xian Zhang
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Performance Enhancement ◽  
Zero Valent Iron ◽  
Iron Particles ◽  
Surface Areas ◽  
Batch Tests ◽  
Resin Beads ◽  
Solid Iron

Hollow and nanoporous particles of zero-valent iron (ZVI) were prepared with template-directed synthesis. Polymer resin beads (0.4 mm diameter) were coated with nanoscale iron particles by reductive precipitation of ferrous iron [Fe(II)] with sodium borohydride. The resin was calcinated at 400 °C to produce hollow and nanoporous iron spheres. The nanoporous iron oxides were then reduced to metallic iron by hydrogen at 500 °C. Scanning electron microscope images of the reduced iron spheres showed that the particles were hollow. The shell thickness was approximately 5 μm and highly porous. Brunauer–Emmett–Teller specific surface area was 2100 m2/kg. In comparison, the theoretical specific surface area of solid iron particles of the same size is just 1.9 m2/kg. Batch tests showed that the surface area normalized reactivity of the porous particles were 14–31% higher than microscale iron particles with similar surface areas for the transformation of hexavalent chromium [Cr(VI)], azo dye Orange II {4-[(2-hydroxyl-1-naphthalenyl)azo]-benzenesulfonic acid monosodium}, and trichloroethene. The combined performance enhancement (larger surface area and higher surface activity) is significant (>1200 times).

scholarly journals Ring-Opening Metathesis Polymerization Derived Hierarchically Porous Carbon-Foams

2020 ◽  
Author(s):  
Sebastijan Kovačič ◽  
Nadejda B. Matsko ◽  
Katharina Gruber ◽  
Stefan Koller ◽  
Christian Slugovc
Keyword(s):  
Specific Surface ◽  
Carbon Content ◽  
Surface Area ◽  
Specific Surface Area ◽  
Porous Carbon ◽  
Ring Opening ◽  
Carbon Materials ◽  
Electronic Conductivity ◽  
Internal Phase ◽  
Carbon Foams

Monolithic open macroporous carbons of 80-85 % porosity are obtained from pyrolyzing oxidized high internal phase templated poly(dicyclopentadiene) foams. The macropores void diameters of the resulting carbon foams can be ajusted between 87 and 2.5 mikrometer simply by changing the surfactant amount used in the preparation of the precursor foams. The resulting porous carbon materials are charcterized by a carbon content >97%, an electronic conductivity of up to 2800 S/m, a Young's modulus of up to 2.1 GPa and a specific surface area of up to 1200 m<sup>2</sup>/g. <br>

Experimental Studies of Carbon Electrodes With Various Surface Area for Li–O2 Batteries

2019 ◽  
Vol 16 (4) ◽  
Author(s):  
Fangzhou Wang ◽  
P. K. Kahol ◽  
Ram Gupta ◽  
Xianglin Li
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Discharge Capacity ◽  
Carbon Materials ◽  
High Specific Surface Area ◽  
Acetylene Black ◽  
Carbon Electrodes ◽  
Tea Leaves ◽  
Surface Areas

Li−O2 batteries with carbon electrodes made from three commercial carbons and carbon made from waste tea leaves are investigated in this study. The waste tea leaves are recycled from household tea leaves and activated using KOH. The carbon materials have various specific surface areas, and porous structures are characterized by the N2 adsorption/desorption. Vulcan XC 72 carbon shows a higher specific surface area (264.1 m2/g) than the acetylene black (76.5 m2/g) and Super P (60.9 m2/g). The activated tea leaves have an extremely high specific surface area of 2868.4 m2/g. First, we find that the commercial carbons achieve similar discharge capacities of ∼2.50 Ah/g at 0.5 mA/cm2. The micropores in carbon materials result in a high specific surface area but cannot help to achieve higher discharge capacity because it cannot accommodate the solid discharge product (Li2O2). Mixing the acetylene black and the Vulcan XC 72 improves the discharge capacity due to the optimized porous structure. The discharge capacity increases by 42% (from 2.73 ± 0.46 to 3.88 ± 0.22 Ah/g) at 0.5 mA/cm2 when the mass fraction of Vulcan XC 72 changes from 0 to 0.3. Second, the electrode made from activated tea leaves is demonstrated for the first time in Li−O2 batteries. Mixtures of activated tea leaves and acetylene black confirm that mixtures of carbon material with different specific surface areas can increase the discharge capacity. Moreover, carbon made from recycled tea leaves can reduce the cost of the electrode, making electrodes more economically achievable. This study practically enhances the discharge capacity of Li−O2 batteries using mixed carbons and provides a method for fabricating carbon electrodes with lower cost and better environmental friendliness.

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