Sulfur-doped nanoporous carbon spheres with ultrahigh specific surface area and high electrochemical activity for supercapacitor

2017 ◽  
Vol 360 ◽  
pp. 373-382 ◽  
Author(s):  
Simin Liu ◽  
Yijin Cai ◽  
Xiao Zhao ◽  
Yeru Liang ◽  
Mingtao Zheng ◽  
...  
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Nanoporous Carbon ◽  
Electrochemical Activity ◽  
Carbon Spheres

Preparation of Hollow Carbon Spheres with Large Size and High Specific Surface Area from Phenolic Resin

2012 ◽  
Vol 557-559 ◽  
pp. 932-936
Author(s):  
Bin Yang ◽  
Cheng Yang Wang ◽  
Jia Ming Zheng ◽  
Ming Ming Chen
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Phenolic Resin ◽  
High Specific Surface Area ◽  
Polymerization Process ◽  
External Diameter ◽  
Carbon Spheres ◽  
Hollow Carbon ◽  
Hollow Carbon Spheres

Millimeter size Hollow carbon spheres (HCSs) with high specific surface area were successfully prepared from resole-type phenolic resin by suspension polymerization method at ordinary pressure. During the polymerization process, large sums of small molecule gathered at the center and formed the hollow part, bigger spheres with a broad size distribution were then formed under stirring force and surface tension, the maximum external diameter of the obtained HCSs was 1.2mm and the hollow diameter was about 0.35mm. After activating at 800°C under a stream of steam, the specific surface area and total pore volume of the HCSs were reached as 1117m2/g and 0.61cm3/g.

scholarly journals Synthesis and Characterization of Nanoporous Carbon Materials; The Effect of Surfactant Concentrations and Salts

2011 ◽  
Vol 8 (1) ◽  
pp. 196-200 ◽  
Author(s):  
Shokoofeh Geranmayeh ◽  
Alireza Abbasi ◽  
Alireza Badiei
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Self Assembly ◽  
Nanoporous Carbon ◽  
Pluronic F127 ◽  
Molar Ratio ◽  
Soft Template ◽  
Carbon Framework ◽  
Evaporation Induced Self Assembly

Nanoporous carbon framework was synthesized using phenol and formaldehyde as carbon precursors and triblock copolymer (pluronic F127) as soft templateviaevaporation induced self-assembly. Hexagonal mesoporous carbon with specific surface area of 350 m2/g through optimizing the situation was obtained. The effects of different surfactant/phenol molar ratio and presence of salts on specific surface area, pore size and pore volume for all the prepared samples were studied by means of the Brunauer-Emmett-Teller (BET) formalism, powder X-ray diffraction technique and FT-IR spectroscopy.

scholarly journals Hierarcal porous polystyrene-based activated carbon spheres for CO2 capture

2021 ◽  
Author(s):  
Xiaoxia Ren ◽  
Changming Zhang ◽  
Lifang Kou ◽  
Rongxian Wang ◽  
Yaqi Wang ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Specific Surface ◽  
Adsorption Capacity ◽  
Surface Area ◽  
Specific Surface Area ◽  
Total Pore Volume ◽  
Gaseous Ammonia ◽  
Carbon Spheres ◽  
Porous Texture ◽  
Activated Carbon Spheres

Abstract Activated carbon spheres with high specific surface area and hierarcal porous texture were prepared from polystyrene-based macroreticular resin spheres by air pre-oxidization and steam activation. The as-prepared carbon spheres had a specific surface area of 1274.95 m2 g− 1, total pore volume of 1.09 cm3 g− 1 and micropore volume of 0.47 cm3 g− 1. Moreover, these carbon spheres showed a hierarcal porous texture composed of ultrafine micropores (0.5-1 nm), micropores (1–2 nm), mesopores (10–50 nm) and macropores (50–100 nm). A CO2 adsorption capacity of 2.82 mmol g− 1 for carbon spheres can be obtained at 30 ℃ and 1 atm. Further, after introducing nitrogen-containing functional groups by gaseous ammonia at 600 ℃, these carbon spheres exhibited a high CO2 adsorption capacity of 3.2 mmol g− 1. In addition, excellent cyclic stability, low hygroscopicity and regenerability temperature suggested these carbon spheres were favorable for CO2 capture.

Synthesis and Structural Morphology of Ordered Nanoporous Carbon via SBA-15 Hard Template

2011 ◽  
Vol 233-235 ◽  
pp. 2239-2242 ◽  
Author(s):  
Bing Zhang ◽  
Zhi Xue Yu ◽  
Yong Hong Wu ◽  
Fan Yan Meng
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Nitrogen Adsorption ◽  
Nanoporous Carbon ◽  
X Ray Diffraction ◽  
Structural Morphology ◽  
Transmission Electron ◽  
Adsorption Technology ◽  
Thermal Stability Of

Ordered nanoporous carbon (ONC) was synthesized by adopting sucrose as precursor and SBA-15 as template. The thermal stability of sucrose and its SBA-15 composite were detected by thermogravimertic analysis. Transmission Electron Microscope, X-ray diffraction and nitrogen adsorption technology were used to characterize the morphology, microstructure and specific surface area of resultant ONC. The effects of carbonization temperature and pre-carbonization on the microstructure of ONC were investigated. The results have shown that SBA-15 is a kind of ideal template for preparing ONC, from which ONC with the diameter around 8 nm was obtained. When carbonized at 700 °C, the specific surface area of ONC derived is 2884.05 m2/g.

A preceramic polymer derived nanoporous carbon hybrid for supercapacitors

2019 ◽  
Vol 55 (59) ◽  
pp. 8631-8634 ◽  
Author(s):  
Ipsita P. Swain ◽  
Soobhankar Pati ◽  
Shantanu K. Behera
Keyword(s):  
Specific Surface ◽  
Specific Capacitance ◽  
Surface Area ◽  
Specific Surface Area ◽  
Nanoporous Carbon ◽  
Preceramic Polymer ◽  
Capacitive Properties

A novel two step synthesis from a preceramic polymer afforded a nanoporous carbon hybrid with specific surface area of 1798 m2 g−1, porosity in the range of 1–4 nm, and excellent capacitive properties including specific capacitance of 333 F g−1.

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