High Surface Area Nanoporous Activated Carbons Materials from Areca catechu Nut with Excellent Iodine and Methylene Blue Adsorption

Abstract

Nanoporous carbon materials from biomass exhibit a high surface area due to well-defined pore structures. Therefore, they have been extensively used in separation and purification technologies as efficient adsorbents. Here, we report the iodine and methylene blue adsorption properties of the hierarchically porous carbon materials prepared from Areca catechu nut. The preparation method involves the phosphoric acid (H3PO4) activation of the Areca catechu nut powder. The effects of carbonization conditions (mixing ratio with H3PO4, carbonization time, and carbonization temperature) on the textural properties and surface functional groups were studied. The optimum textural properties were obtained at a mixing ratio of 1:1, carbonized for 3 h at 400 °C, and the sample achieved a high specific surface area of 2132.1 m2 g−1 and a large pore volume of 3.426 cm3 g−1, respectively. The prepared materials have amorphous carbon structures and contain oxygenated surface functional groups. Due to the well-defined micro-and mesopore structures with the high surface area and large pore volume, the optimal sample showed excellent iodine and methylene blue adsorption. The iodine number and methylene blue values were ca. 888 mg g−1 and 369 mg g−1, respectively. The batch adsorption studies of methylene dye were affected by pH, adsorbent dose, contact time, and initial concentration. The optimum parameters for the methylene blue adsorption were in alkaline pH, adsorbent dose of 2.8 g L−1, and contact time of 180 min. Equilibrium data could be best represented by the Langmuir isotherm model with a monolayer adsorption capacity of 333.3 mg g−1. Thus, our results demonstrate that the Areca catechu nut has considerable potential as the novel precursor material for the scalable production of high surface area hierarchically porous carbon materials that are essential in removing organic dyes from water.

Myeloprotection with activated carbon in doxorubicin-treated rats

“…1 E and F), that similarly to HSGD may have predominant dimensions of mesoporous range [ 16 ]. In fact, these AC beads, in addition to very large specific surface area (4490 m 2 /g), were found to be characterized by an exceptionally high total pore volume of 5.29 cm 3 /g with an average pore diameter of 4.71 nm, which is extremely rare for activated and other porous carbons described elsewhere to date [ 17 , 18 ].

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Comparative study of machine learning based prediction of supercapacitance performance of activated carbon prepared from Bio-based Materials

“…To get rid of any remaining acids or other contaminants, the prepared activated carbon was thoroughly rinsed with distilled water. The synthesized activated carbon (AC) was analyzed by determining its iodine number, methylene blue number, surface area, mesopore volume and total pore volume [18][19][20]. We took eight data for each feature of methylene blue number, iodine number, surface area, mesopore volume, and total pore volume.…”