KOH activated carbon from conventional and microwave heating system of a macroalgae waste from the Agar–Agar industry

Sustainable porous carbons from lignocellulosic wastes obtained from the extraction of tannins

“…4), in the specific surface area (1038 and 1604 m 2 g À1 for the activated carbons obtained at 700°C and 900°C, respectively) and also in the total pore volume (0.415 and 0.672 cm 3 g À1 for the adsorbents obtained at 700°C and 900°C, respectively), Table 3. It has also been reported that increases in activation temperatures produce adsorbent materials with higher surface areas [10,33].…”

Comparative study on microstructure and surface properties of keratin- and lignocellulosic-based activated carbons

“…As listed in Table 3, the surface area of ACs in this study is higher than that of ACs prepared by different activating agents. AC activated by KOH possesses S BET and V tot as high as 2118 m 2 /g and 1.14 cm 3 /g [20], while CAAC can reach to 2180 m 2 /g of S BET and 1.408 cm 3 /g of V tot . According to the results, K 2 SiO 3 can be considered as a promising activating agent for AC preparation.…”

Non-activated high surface area expanded graphite oxide for supercapacitors

“…Exfoliation takes place when the decomposition rate of the oxygen functional groups of GO exceeds the diffusion rate of the evolved gases, thus yielding pressures that exceed the Van der Waals forces that hold the graphene sheets together [47]. Microwaves, as an alternative energy input source, have been widely used not only for the expansion of GO but also in the field of organic synthesis [48][49][50], environmental remediation [51][52][53], preparation of catalysts [54][55][56] and activated carbon [57][58][59]. Carbon materials and particularly graphene-based materials have attracted intense interest as electrode materials for electrochemical capacitors due to their high surface area, electrical conductivity, chemical stability and low cost.…”