Details

Autor(en) / Beteiligte

• Li, Hengye
• Bie, Wenwen
• Zhang, Shuzhao
• Zhang, Lin
• Sun, Xiaoyu
• Cai, Tianpei
• Wang, Zhongxia
• Wei, Meijie
• Kong, Fenying
• Wang, Wei

Titel

Porous β-cyclodextrin polymers for rapid and efficient removal of organic micropollutants from water: The role of sulfonation and porosity on adsorption performance

Ist Teil von

• Chemosphere (Oxford), 2024-09, Vol.363, p.142740, Article 142740

Ort / Verlag

England: Elsevier Ltd

Erscheinungsjahr

2024

Quelle

Access via ScienceDirect (Elsevier)

Beschreibungen/Notizen

• Removal of organic micropollutants (OMPs) from water, especially hydrophilic and ionized ones, is challenging for water remediation. Herein, porous β-cyclodextrin polymers (PCPs) with tailored functionalization were prepared based on molecular expansion strategy and sulfonation. Partially benzylated β-cyclodextrin was knotted by external crosslinker to form PCP1, and knotting PCP1 by expansion molecule generated PCP2. PCP1 and PCP2 were sulfonated to achieve PCP1–SO3H and PCP2–SO3H. Based on systematical adsorption evaluation toward multiple categories of OMPs, it was found that the introduced strong polar –SO3H group could bring strong hydrogen bonding and electrostatic interactions. PCP2 showed the highest surface (998.97 m2/g) displayed more excellent adsorption performance toward neutral and anionic OMPs, and the adsorption mechanism for this property of PCP2 was dominated by hydrophobic interactions. In addition, the PCP1–SO3H with the lowest surface area (39.75 m2/g) rather than PCP2–SO3H with higher surface (519.28 m2/g) exhibited more superior adsorption towards hydrophilic and cationic OMPs, benefiting by hydrogen bonding and electrostatic interactions as well as appropriate porosity. These results not only confirmed the performance enhancement of PCPs through the integration of novel preparation strategy, but also provided fundamental guidance for PCPs design for water remediation. [Display omitted] •Porous β-cyclodextrin polymer (PCP1) with π-conjugated structure was prepared.•Molecular expansion was used to prepare PCP2 with improved surface area based on PCP1.•PCP1–SO3H and PCP2–SO3H were prepared through sulfonation by chlorosulfonic acid.•PCP2 enhanced the adsorption towards neutral organic micropollutants (OMPs).•PCP1–SO3H greatly improved the adsorption towards hydrophilic and cationic OMPs.