Activated carbons with well-developed mesoporosity prepared by activation with different alkali salts

Gao, Yuan; Yue, Qinyan

doi:10.1016/j.matlet.2015.01.161

Cited by 25 publications

(6 citation statements)

References 9 publications

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“…[34] Many acid, alkali and salt activating agents have been used to synthesize porous carbon in previous study. [35][36] Potassium hydroxide (KOH) treatment is one of the effective methods for enhancing porous structure. [21,33,37] In this study, porous carbon was prepared by using Euryale ferox shells as raw material and potassium hydroxide (KOH) and potassium chloride (KCl) as activator, which was named sample EACÀ C-1.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Preparation and Activation Manner on Surface Area of Hierarchical Porous Carbons Derived from Nut (Euryale ferox) Shell

Zhang

Liu

et al. 2022

ChemistrySelect

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Hierarchical nano‐micro carbon spheres porous carbon composites are successfully synthesized derived from Euryale ferox shells by the in‐situ decoration of the porous carbon with carbon spheres from carboxymethyl cellulose under the activation of KOH. Effects of fabrication and activation manner on surface area of porous carbons were investigated. The influence of activation temperature, impregnation ratio and modifier were analyzed. The specific surface area, pore volume and average pore diameter of porous carbon was characterized by N2 adsorption isotherms. Porous carbon produced at 800 °C with an impregnation ratio of 3, 2 hours of carbonization time, 20 hours immersion time has been found 2506 m2 g−1, 1.515 cm3 g−1 and 2.4 nm of the optimum specific surface area, pore volume and average pore diameter, respectively. The result of Fourier‐infrared spectroscopy analysis of the prepared porous carbon confirmed that it has abundant functional groups on the surface. The scanning electron micrographs of the prepared porous carbon indicated that a well‐developed pore structure was formed during the experiment.

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Section: Introductionmentioning

confidence: 99%

“…Activation method is mainly divided into physical activation method and chemical activation method [34] . Many acid, alkali and salt activating agents have been used to synthesize porous carbon in previous study [35–36] . Potassium hydroxide (KOH) treatment is one of the effective methods for enhancing porous structure [21,33,37] .…”

Section: Introductionmentioning

confidence: 99%

Effects of Preparation and Activation Manner on Surface Area of Hierarchical Porous Carbons Derived from Nut (Euryale ferox) Shell

Zhang

Liu

et al. 2022

ChemistrySelect

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“…Activated carbon is a porous material that has potential in the removal of chemical species by adsorption [14]. The mesopores and macropores of activated carbon can be used to remove large pollutants such as dyes [15]. According to previous studies, activated carbon is able to adsorb MB [16][17][18] and MV 2B [3,19].…”

Section: ■ Introductionmentioning

confidence: 99%

Synthesis of Activated Carbon/Chitosan/Alginate Beads Powder as an Adsorbent for Methylene Blue and Methyl Violet 2B Dyes

2020

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The activated carbon-chitosan-alginate (KKA) beads powder was synthesized to form an adsorbent for the cationic dyes, methylene blue (MB) and methyl violet 2B (MV 2B). The aims of this research were to determine the optimum composition of KKA beads powder for the adsorption of cationic dyes and to investigate the effect of pH, adsorbent mass, contact time, and initial concentration of MB and MV 2B dyes. A desorption study was also implemented to predict the adsorption mechanisms of MB and MV 2B dyes. The KKA beads powder was prepared by mixing chitosan, Na-alginate with various variation of masses (0.6; 0.8; 1.0; and 1.2 g) and activated carbon. The KKA beads were immersed in a CaCl2 solution. The KKA beads powder was characterized using FTIR spectroscopy and SEM. The desorption study was conducted in NaCl (0.1 M and 1.0 M), ethanol (40% and 60%), and pH 4 solution. The result showed that the KKA beads powder had been successfully created, with maximum adsorption capacities of 1.34 mmol g–1 for MB and 1.23 mmol g–1 for MV 2B. The kinetics and isotherms of MB and MV dyes adsorption on the KKA beads powder followed pseudo second order kinetics model and Freundlich isotherm. The desorption study showed that 60% ethanol was the most effective desorption solution for cationic dyes.

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“…Nafion-H), natural clay (e.g. bentonite) and strong super acid such as sulfated zirconia [13][14][15]. In fact, none of the above heterogeneous catalysts is ideal for all types of acidcatalyzed reactions.…”

Section: Introductionmentioning

confidence: 99%

Batch to batch variation study for biodiesel production by hydrothermal carbon catalyst: preparation, characterization and its application

Memon

et al. 2020

Mater. Res. Express

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In the present study, the esterification of oleic acid with methanol was studied in batch to batch method over hydrothermal carbon catalyst (HTCC) from Ziziphus Mauritiana L.. The synthesized catalyst was characterized by FT-IR, XRD, XPS, SEM, and BET analysis. The surface area and acid density of prepared HTCC were found to be 15.97 m 2 g −1 and 2.53 mmol g −1 , respectively. Statistical analysis was performed by using ANOVA, mean, standard deviation and variance method. Statistically there is no significant difference among the means of the 4 variables at the 95% confidence level and the P-value of the F-test is equal to or greater than the 0.05. The maximum oleic acid conversions from methanol were obtained upto 91%. Furthermore, reusability and regeneration study were also carried out to assess to check catalytic performance. The study reveals that HTCC obtained from Ziziphus Mauritiana L. is an excellent catalyst and can be used for esterification of oleic acid to produce biodiesel.

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Activated carbons with well-developed mesoporosity prepared by activation with different alkali salts

Cited by 25 publications

References 9 publications

Effects of Preparation and Activation Manner on Surface Area of Hierarchical Porous Carbons Derived from Nut (Euryale ferox) Shell

Effects of Preparation and Activation Manner on Surface Area of Hierarchical Porous Carbons Derived from Nut (Euryale ferox) Shell

Synthesis of Activated Carbon/Chitosan/Alginate Beads Powder as an Adsorbent for Methylene Blue and Methyl Violet 2B Dyes

Batch to batch variation study for biodiesel production by hydrothermal carbon catalyst: preparation, characterization and its application

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