Porous carbon with small mesoporesas an ultra-high capacity adsorption medium

摘要

Resins (732-type), abundant and inexpensive resources were used to prepare porous carbon with small mesopores (CSM) by carbonization and post-chemical-activation with potassium hydroxide (KOH). The N-2 adsorption measurements revealed that CSM had high surface areas (1776.5 m(2) g(-1)), large pore volumes (1.10 cm(3) g(-1)), and nearly optimal narrow small mesopore sizes ranging from 2 to 7 nm. CSM was used as adsorbent to investigate the adsorption behavior for Rhodamine B (RhB). Due to the optimal pore size distributions (PSD), intensive-stacking interaction, S-doped, and electrostatic attraction, the CSM exhibited an ultra-high-capacity of 1590 mg g(-1) for RhB in aqueous solutions. (C) 2017 Elsevier B.V. All rights reserved.