Preparation of activated carbon aerogel and its application to electrode material for electric double layer capacitor in organic electrolyte: Effect of activation temperature

Kwon, Soon Hyung; Lee, Eunji; Kim, Bum Soo; Kim, Sang-Gil; Byung-Jun, Lee; Kim, Myung-Soo; Jung, Ji Chul

doi:10.1007/s11814-014-0215-z

Cited by 27 publications

(12 citation statements)

References 33 publications

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“…Note that the bagasse‐derived AC particles in the SEM image afford a smaller size (<10 μm) compared to that of original bagasse precursor, which mainly caused by the broken process under the high‐temperature driven activated condition. Besides, the dramatic loss of surface oxygen moieties and carbon from the bagasse precursor during the activation reaction led to the serious damage of its whole structure [39–41] . Figure 1c shows the more detailed SEM image of BC‐1 at the size of 5 μm.…”

Section: Resultsmentioning

confidence: 99%

Route‐Optimized Synthesis of Bagasse‐Derived Hierarchical Activated Carbon for Maximizing Volatile Organic Compound (VOC) Adsorption Capture Properties

Yang

et al. 2021

ChemistrySelect

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The deep exploration of adsorption preferential specific structural properties of waste biomass‐derived activated carbon(AC) adsorbent is significant but challenged in the light of the synthetic control. This work optimizes chemical activation routine of waste bagasse‐derived AC to fabricate high‐performance adsorbent. The resultant optimal AC affords outstanding structural properties (SBET=2832.2 m2 g−1, SLang=5478.3 m2 g−1, Vtotal=1.93 cm3 g−1). The pre‐carbonization method (using high‐temperature calcination or hydrothermal) and the implanting approach of KOH (impregnation or grinding method) were rationally tuned, and the corresponding effect on structural properties of AC and their adsorption capacity for volatile organic compounds(VOCs) were carefully studied for the first time. The obtained optimal BC‐1 adsorbent showed the highest adsorption capacity (1604.5 mg g−1 and 1679.5 mg g−1) of benzene and toluene, which is nearly 1.73 folds enhancement compared to others derived from comparative routes. This adsorption property is far superior to that of industrial AC. Meanwhile, the adsorption capacity and adsorption behavior were further demonstrated to be directly determined by the total pore volume and Langmuir surface area of the adsorbent through correlating adsorption properties with structural characters. Besides, we demonstrated the superior adsorption selectivity of C6H6/H2O(g) (61.22) and C7H8/H2O(g) (189.33) over BC‐1 under humid conditions predicted by the DIH (difference of the isosteric heats) equation.

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Section: Resultsmentioning

confidence: 99%

Route‐Optimized Synthesis of Bagasse‐Derived Hierarchical Activated Carbon for Maximizing Volatile Organic Compound (VOC) Adsorption Capture Properties

Yang

et al. 2021

ChemistrySelect

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“…If the content was expressed on the dried raw sludge base (mg kg-drb −1 ), it was found that a small amount of trace elements would be lost during the pyrolysis process. The washing process is an important step in the preparation of adsorbents through chemical activation [39]. When the activation temperature is lower than the boiling point of the activator, the char should be washed to release the compounds remaining in the carbon network to improve the porous structure.…”

Section: Characteristics Of Sludge-derived Adsorbentsmentioning

confidence: 99%

Product Characteristics of Sludge Pyrolysis and Adsorption Performance of Metals by Char

et al. 2021

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The microwave heating system was used for sludge pyrolysis. The raw sludge and KOH-immersed sludge were pyrolyzed and their product characteristics were determined. The research results are advantageous to understand the influence of KOH activation on characteristics of pyrolysis products and the adsorption performance of metals in char. In the case of a high temperature and high KOH dose, most of the lost mass from sludge pyrolysis was converted into gaseous products instead of oil. The heat values of liquid oils were 40.86–41.39 MJ kg−1, which has the potential for use as fuels. The use of a higher KOH dose for sludge pyrolysis is beneficial to the porosity development and generates a mesopore structure. The results from adsorption tests indicate that precipitation could be the dominant adsorption mechanism due to the binding between alkaline anion and carbonate and metal ions with a strong chemical affinity. The high KOH dose sludge adsorbent has a remarkable adsorption performance and can be used as adsorbent for the removal of the studied metals.

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“…31,[87][88][89][90] Carbon aerogels are promising electrode materials for supercapacitors due to their tunable surface area, porosity, electrical conductivity and scope for increasing surface area further by activation. 88,89,91 However, porous carbon xerogels with surface modification can be considered as electrode material for supercapacitors. In this context, various techniques for altering the carbon xerogels porosity for example by changing the catalyst concentration, using template for uniform pore size and activation have already been reported.…”

Section: B Carbon Xerogels For Supercapacitorsmentioning

confidence: 99%

Resorcinol-formaldehyde derived carbon xerogels: A promising anode material for lithium-ion battery

Kakunuri

Sharma

2017

J. Mater. Res.

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Preparation of activated carbon aerogel and its application to electrode material for electric double layer capacitor in organic electrolyte: Effect of activation temperature

Cited by 27 publications

References 33 publications

Route‐Optimized Synthesis of Bagasse‐Derived Hierarchical Activated Carbon for Maximizing Volatile Organic Compound (VOC) Adsorption Capture Properties

Route‐Optimized Synthesis of Bagasse‐Derived Hierarchical Activated Carbon for Maximizing Volatile Organic Compound (VOC) Adsorption Capture Properties

Product Characteristics of Sludge Pyrolysis and Adsorption Performance of Metals by Char

Resorcinol-formaldehyde derived carbon xerogels: A promising anode material for lithium-ion battery

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