Formation of functional groups on an activated carbon material surface using electrochemical oxidation

Carbon ◽  
2016 ◽  
Vol 107 ◽  
pp. 933
Author(s):  
Kei Kato ◽  
Takuya Yura ◽  
Kiyoharu Nakagawa ◽  
Hirokazu Oda
Keyword(s):  
Activated Carbon ◽  
Electrochemical Oxidation ◽  
Functional Groups ◽  
Carbon Material ◽  
Material Surface

scholarly journals Formation of functional groups on an activated carbon material surface using electrochemical oxidation

TANSO ◽  
2016 ◽  
Vol 2016 (273) ◽  
pp. 96-100
Author(s):  
Kei Kato ◽  
Takuya Yura ◽  
Kiyoharu Nakagawa ◽  
Hirokazu Oda
Keyword(s):  
Activated Carbon ◽  
Electrochemical Oxidation ◽  
Functional Groups ◽  
Carbon Material ◽  
Material Surface

scholarly journals Research on super capacitance properties of modified activated carbon in sodium sulfate electrolyte

2018 ◽  
Vol 238 ◽  
pp. 01003
Author(s):  
Lin Wang ◽  
Chun Wang ◽  
Ying Liu ◽  
Heng Yan ◽  
Xiangbo Zhang ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Functional Groups ◽  
Carbon Material ◽  
Electrode Materials ◽  
Specific Capacity ◽  
Electrode System ◽  
Sulfate Electrolyte ◽  
Modified Activated Carbon ◽  
Before And After ◽  
Adsorption Desorption

In order to improve the specific capacity and energy density of activated carbon electrode materials activated carbon was modified by surface treatment using hydrogen peroxide. The modified carbons were characterized the changes of pore structure and functional groups before and after modification by N2 adsorption-desorption isotherms and FTIR spectroscopy. The three electrode system was assembled with modified activated carbon as electrode materials and Na2SO4 as the electrolyte. The influence of surface modification on the performance of EDLCs was studied by galvanostatic charge-discharge, cyclic voltammetry, and alternating current impedance. The results show that the surface chemistry of the modified activated carbon material has changed, the specific surface area has changed and the pore size has not changed much with the introduction of new oxygen-containing functional groups. The specific capacity of the activated carbon material modified by 5h is 75F/g, which is 86.1% higher than that before the modification. It can be seen that the change of functional group after the modification of activated carbon can help to increase the specific capacity.

Modification of Activated Carbon from Biomass Nypa and Amine Functional Groups as Carbon Dioxide Adsorbent

2017 ◽  
Vol 28 (Suppl. 1) ◽  
pp. 227-240 ◽  
Author(s):  
Nur 'Izzati A. Ghani ◽  
◽  
Nur Yusra Mt Yusuf ◽  
Wan Nor Roslam Wan Isahak ◽  
Mohd Shahbuddin Masdar ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Activated Carbon ◽  
Functional Groups

scholarly journals Deep neural network analysis of nanoparticle ordering to identify defects in layered carbon materials

2021 ◽  
Author(s):  
Daniil A. Boiko ◽  
Evgeniy O. Pentsak ◽  
Vera A. Cherepanova ◽  
Evgeniy G. Gordeev ◽  
Valentine P. Ananikov
Keyword(s):  
Neural Network ◽  
Neural Networks ◽  
Network Analysis ◽  
Carbon Material ◽  
Deep Neural Network ◽  
Carbon Materials ◽  
Material Surface ◽  
Neural Network Analysis ◽  
Pd Nanoparticle ◽  
Sem Imaging

Defectiveness of carbon material surface is a key issue for many applications. Pd-nanoparticle SEM imaging was used to highlight “hidden” defects and analyzed by neural networks to solve order/disorder classification and defect segmentation tasks.

The Selective Oxidation of Hydrocarbons on Isolated Iron Active Sites under Ambient Conditions

2019 ◽  
Vol 41 (6) ◽  
pp. 946-946
Author(s):  
Zhengliang Qi Zhengliang Qi ◽  
Junmei Liu Junmei Liu ◽  
Wanwan Guo and Jun Huang Wanwan Guo and Jun Huang
Keyword(s):  
Ionic Liquid ◽  
Activated Carbon ◽  
Carbon Material ◽  
Active Sites ◽  
High Selectivity ◽  
Good Activity ◽  
Ambient Conditions ◽  
Oxidation Of Hydrocarbons ◽  
Fe Catalysts ◽  
Iron Active Sites

The N-doped carbon material supported Fe catalysts were developed for the oxidation of C-H bond of hydrocarbons to ketones and alcohols. The supported Fe catalysts were prepared by pyrolysis of [CMIM]3Fe(CN)6 ionic liquid in activated carbon. And the Fe(Ⅲ)@CN-600 showed good activity and high selectivity for the oxidation of alfa C-H bond of alkylbenzenes. The isolated Fe(Ⅲ) iron active sites should be responsible for the high activity and selectivity for the oxidation of hydrocarbons to ketones. Several ketones were obtained in good to excellent yields. Moreover, cyclohexanone can also be obtained through the oxidation of cyclohexane.

Thiol-modified activated carbon material for sensor technology

2017 ◽  
Vol 4 (3) ◽  
pp. 4599-4602 ◽  
Author(s):  
Anar Zhexembekova ◽  
Nuriya Akhmetova ◽  
Anara Molkenova ◽  
Zhumabay Bakenov ◽  
Danny O'Hare
Keyword(s):  
Activated Carbon ◽  
Carbon Material ◽  
Sensor Technology ◽  
Modified Activated Carbon

An Environmentally Friendly Technology for Biomass Production Hydorchar from Renewable Resources

2013 ◽  
Vol 726-731 ◽  
pp. 634-637 ◽  
Author(s):  
Yan Qiu Lei ◽  
Hai Quan Su
Keyword(s):  
Activated Carbon ◽  
Reaction Time ◽  
Adsorption Capacity ◽  
Functional Groups ◽  
Biomass Production ◽  
Renewable Resources ◽  
Environmentally Friendly ◽  
Hydrothermal Carbonization ◽  
Removal Rates

A green and sustainable route for preparation of hydrochars from cornstalk by hydrothermal carbonization (200°C) was described. The morphology of the hydrochars changed with reaction time increased, the surface of the materials contained a large number of functional groups, showed higher adsorption capacity for Cr (VI) than activated carbon and the removal rates of Cr (VI) were 67% and 29% respectively (pH=1, 20°C).

Surface Oxidation Modification and Performance of Activated Carbon Electrode Material

2011 ◽  
Vol 347-353 ◽  
pp. 3456-3458
Author(s):  
Ren Qing Wang ◽  
Mei Gen Deng
Keyword(s):  
Activated Carbon ◽  
Specific Capacitance ◽  
Functional Groups ◽  
Photoelectron Spectroscopy ◽  
Surface Oxidation ◽  
Constant Current ◽  
Carbon Electrode ◽  
Constant Current Charge ◽  
And Performance ◽  
Double Layer Capacitors

Superscript text Commercial activated carbon was modified by surface treatment using nitric acid, The modified carbons were characterized by X-ray photoelectron spectroscopy (XPS).The resultant carbon electrode-based electric double-layer capacitors (EDLCs)were assembled with 1 mol/L （NH4）2SO4 as the electrolyte. The influence of introduced functional groups, such as hydroxyl and carbonyl, on the performance of EDLCs was studied by Constant current charge-discharge. These functional groups significantly improved the wettability of AC. As a result, the specific capacitance of the carbon modified with 40wt.%HNO3 achieved a specific capacitance of 223.45 F/g at a current density of 5mA/cm2, which is 100.9% higher than that of original AC.

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