Journal ArticleDOI
Preparation of activated carbon with highly developed mesoporous structure from Camellia oleifera shell through water vapor gasification and phosphoric acid modification
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In this paper, the authors used Camellia oleifera shell as starting material and used water vapor gasification followed by phosphoric acid modification to increase the mesoporous ratio of the activated carbon.Abstract:
Using Camellia oleifera shell as starting material, production of activated carbon rich in mesoporous structure has been investigated with water vapor gasification followed by phosphoric acid modification. This method is found to be very effective in increasing the mesoporous ratio of the activated carbon. The micropores of the activated carbon gasified by water vapor (raw activated carbon) serve as channels for phosphoric acid impregnation to enlarge the pore size. Results of the activated carbon modified by phosphoric acid (final activated carbon) show a high mesoporous ratio of 61%, which is twice as high as that of raw activated carbon. Such modification also increases the BET surface area and total pore volume to 1608 m 2 /g and 1.17 cm 3 /g, respectively. The final activated carbon exhibits high adsorption capacity for methylene blue and iodine, with the adsorption values of methylene blue and iodine increasing from 180 to 1012 mg/g to 330 and 1326 mg/g, respectively. The present preparation is a convenient yet promising method to combine gasification and modification to obtain activated carbon with highly developed mesoporous structures.read more
Citations
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Engineered/designer biochar for contaminant removal/immobilization from soil and water: Potential and implication of biochar modification
Anushka Upamali Rajapaksha,Season S. Chen,Daniel C.W. Tsang,Ming Zhang,Meththika Vithanage,Sanchita Mandal,Bin Gao,Nanthi Bolan,Yong Sik Ok +8 more
TL;DR: Modification to produce engineered/designer biochar is likely to enhance the sorption capacity of biochar and its potential applications for environmental remediation.
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Integrated adsorption and photocatalytic degradation of volatile organic compounds (VOCs) using carbon-based nanocomposites: A critical review.
TL;DR: A critical review of the related literature is provided to establish the "structure-property-application" relationships for the development of innovative carbon-supported nanocomposites and to promote future research on the integrated adsorptive and photocatalytic removal of VOCs.
Journal ArticleDOI
A review: production of activated carbon from agricultural byproducts via conventional and microwave heating
TL;DR: A survey of the development in the production processes of activated carbon from agricultural waste can be found in this article, where the applied methodology and the influences of activating conditions, such as carbonization temperature, retention time, and impregnation ratio are discussed.
Journal ArticleDOI
Potassium hydroxide activation of activated carbon: a commentary
TL;DR: In this article, the limitations and implications of using KOH in the activation process are highlighted, and the selection of appropriate potassium salts for activated carbon preparation is also recommended; however, the adverse drawbacks of employing KOH have been overlooked in many of the published studies.
Journal ArticleDOI
Microwave assisted synthesis of camellia oleifera shell-derived porous carbon with rich oxygen functionalities and superior supercapacitor performance
Jiyuan Liang,Jiyuan Liang,Tingting Qu,Xiang Kun,Yu Zhang,Shanyong Chen,Yuan-Cheng Cao,Mingjiang Xie,Mingjiang Xie,Xuefeng Guo +9 more
TL;DR: In this paper, an oxygen-rich porous carbon (KMAC) was fabricated through a rapid and convenient microwave assisted carbonization and KOH activation of camellia oleifera shell.
References
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Journal ArticleDOI
Use of activated carbons prepared from sawdust and rice-husk for adsorption of acid dyes: a case study of Acid Yellow 36
TL;DR: In this paper, an acid dye, acid yellow 36, was used as the adsorbate for the removal of acid dyes from aqueous solution and the results showed that a pH value of 3 is favorable for the adsorption of acid dye.
Journal ArticleDOI
Novel activation process for preparing highly microporous and mesoporous activated carbons
TL;DR: In this article, an improved ZnCl 2 -chemical activation method was proposed to produce highly porous activated carbons from lignocellulosic materials, such as coconut shells and palm seeds.
Journal ArticleDOI
Production and characterization of activated carbons from olive-seed waste residue
TL;DR: In this paper, the effects of activation time and activation temperature on porosity of the prepared carbons were studied, and the produced carbons are characterized by N 2 adsorption at 77 K, using the BET, α s and Dubinin-Radushkevich methods.
Journal ArticleDOI
Activated carbons prepared from rice hull by one-step phosphoric acid activation
Yanping Guo,David A. Rockstraw +1 more
TL;DR: In this article, the evolution of pore structure and surface chemistry in the activation temperature range of 170-450°C was investigated through various characterization techniques and the results showed that the development of porosity (extent of activation) was negligible at activation temperature below 300°C, and rapid evolution occurred in 300-400°C.
Journal ArticleDOI
Activated carbons from almond shells—I: Preparation and characterization by nitrogen adsorption
TL;DR: Several series of activated carbons have been prepared from almond shells by mean of carbonization in a flow of nitrogen followed by activation of carbon dioxide as mentioned in this paper, which leads to the appearance of micropores and a considerable increase in surface area.