Activated bio-chars derived from rice husk via one- and two-step KOH-catalyzed pyrolysis for phenol adsorption

Nitrogen‐doping activated biomass carbon from tea seed shell for CO 2 capture and supercapacitor

“…2,3 Activated carbon is carbonaceous material containing developed internal pore structure with high specific surface area. 13 The one-step method is to pyrolyze the mixture of feedstock and activator, while two-step method includes carbonization and activation process. The most common application of activated carbon is to be adsorbent for various pollutants.…”

“…Previous studies highlighted one-step and two-step methods to prepare activated carbon. 13 The one-step method is to pyrolyze the mixture of feedstock and activator, while two-step method includes carbonization and activation process. ZnCl 2 , KOH, and H 3 PO 4 are the most representative activators.…”

Highly enhanced adsorption performance of tetracycline antibiotics on KOH-activated biochar derived from reed plants

“…In the present study, KOH was used as activating agent to generate porous structures of the reed-based biochar, the mainly activation mechanism for the KOH activation was as follows: 30,39 4KOH…”

“…[27][28][29] The activation methods mainly include physical activation, chemical activation, and integrated process. 20,30,31 The physical activation usually utilizes CO 2 or water vapor as oxidizing agents at a very high temperature (>850 C) and does not involve any chemicals; while the chemical activation involves the impregnation of chemical reagents, such as ZnCl 2 , KOH, and H 3 PO 4 with biochar followed by activation in an inert atmosphere. 31,32 Compared to the former, the latter is more effective because of its lower consumption of energy and time.…”

“…20 In particular, the chemical activation with the KOH has been extensively developed for the synthesis of activated biocarbons. 30,33,34 There are many reports on biochar preparation; most of these reports focus on materials derived from agricultural crop residues, animal manure and sewage sludge. 28,30,[35][36][37] However, wetland plants are less used to produce biochar and the related research literatures are also quite limited.…”