Heteroatom-doped highly porous carbons prepared by in situ activation for efficient adsorptive removal of sulfamethoxazole

Abstract

Porous carbons obtained by in situ activation of organic salts for highly efficient sulfamethoxazole adsorption.

The synergistic action of cyclodextrin-based adsorbent and advanced oxidation processes for sulfamethoxazole removal from water

“…When 3.125 mg/mL of β-EPI were used, the equilibrium was reached right after 5 min, while the plateau was reached within 10-15 min in the presence of higher doses of material. This result is relevant since most of the materials tested as adsorbents for SMX, such as biochars, carbon nanotubes, many different activated carbons, graphene and its derivatives, polymeric substances, and minerals require long contact times (Wang et al 2020;Zheng et al 2020;Prasannamedha and Kumar 2020). For example, coal-based activated carbons require a contact time of 5 h to remove 55% of SMX (Çalışkan and Göktürk 2010), and F400 granular activated carbon requires up to 90 h with a removal of 80% (Moral-Rodríguez et al 2016).…”

Facile synthesis of ultramicroporous carbon adsorbents with ultra‐high CH4 uptake by in situ ionic activation

“…In this work, we report a facile and controllable synthetic strategy for the preparation of novel starch‐based carbon materials (SCs) that exhibit superior CH 4 uptake and selectivity when exposed to a mixed gas stream of CH 4 /N 2 . K + was chosen as the exchanging metal ion as potassium ion species being reported to deliver the highest activation efficiency to generate porosity as the carbon activation agent 25,26 . These SCs are derived from a mixture of starch and a small quantity of acrylic acid, and after a K + ion exchange and in situ activation under an N 2 atmosphere, the resulting starch‐based carbon SCs are shown to have ultramicropores with narrow pore‐size distributions.…”

“…K + was chosen as the exchanging metal ion as potassium ion species being reported to deliver the highest activation efficiency to generate porosity as the carbon activation agent. 25,26 These SCs are derived from a mixture of starch and a small quantity of acrylic acid, and after a K + ion exchange and in situ activation under an N 2 atmosphere, the resulting starch-based carbon SCs are shown to have ultramicropores with narrow pore-size distributions. The adsorption properties of these materials have been characterized by isotherms, heats of adsorption, and selectivity for both CH 4 and N 2 , and we employed a fixed-bed experiment to evaluate dynamic separation performance of SCs.…”

Freestanding Nitrogen‐Doped Carbons with Hierarchical Porosity for Environmental Applications: A Green Templating Route with Bio‐Based Precursors

“…High resolution N 1(s) analysis shows two distinct binding energies for all recipes (Table S2 , Supporting Information): one at 398.5 ± 0.1 eV with 36.4 ± 4.7% area, which is assigned to pyridinic groups; [ 40 , 43 , 44 ] another at 401 ± 0.1 eV with 63.6 ± 4.7% area, which is assigned to quaternary or graphitic‐N. [ 40 , 43 , 44 ] A high share of graphitic‐N in the monolithic carbons results from the high carbonization temperature (750 °C) and favors micropollutants adsorption [ 45 , 46 ] as well as electrocatalytic applications. [ 42 , 44 ]…”