Chemical Tailoring of β-Cyclodextrin-Graphene Oxide for Enhanced Per- and Polyfluoroalkyl Substances (PFAS) Adsorption from Drinking Water
Journal article, 2023

We report on the synthesis of β-cyclodextrin (βCD) modified graphene oxide (GO) nanosheets, having different sized alkyl linkers (GO-Cn-βCD) and their exploitation as sorbent of per- and polyfluoroalkyl substances (PFAS) from drinking water. βCD were functionalized with a pending amino group, and the resulting precursors grafted to GO nanosheets by epoxide ring opening reaction. Loading of βCD units in the range 12 %–36 % was estimated by combined XPS and elemental analysis. Adsorption tests on perfluorobutanoic acid (PFBA), a particularly persistent PFAS selected as case study, revealed a strong influence of the alkyl linker length on the adsorption efficiency, with the hexyl linker derivative GO-C6-βCD outperforming both pristine GO and granular activated carbon (GAC), the standard sorbent benchmark. Molecular dynamic simulations ascribed this evidence to the favorable orientation of the βCD unit on the surface of GO which enables a strong contaminant molecules retention.

β-cyclodextrins

emerging contaminants

water purification

adsorption

graphene oxide

Author

Francesca Tunioli

Consiglo Nazionale Delle Richerche

Tainah Dorina Marforio

University of Bologna

Laura Favaretto

Consiglo Nazionale Delle Richerche

Sebastiano Mantovani

Consiglo Nazionale Delle Richerche

Angela Pintus

Consiglo Nazionale Delle Richerche

Antonio Bianchi

Consiglo Nazionale Delle Richerche

Alessandro Kovtun

Consiglo Nazionale Delle Richerche

Marco Agnes

Consiglo Nazionale Delle Richerche

Vincenzo Palermo

Consiglo Nazionale Delle Richerche

Chalmers, Industrial and Materials Science, Materials and manufacture

Matteo Calvaresi

University of Bologna

Maria Luisa Navacchia

Consiglo Nazionale Delle Richerche

M. Melucci

Consiglo Nazionale Delle Richerche

Chemistry - A European Journal

0947-6539 (ISSN) 1521-3765 (eISSN)

Vol. 29 60 e202301854

Subject Categories

Analytical Chemistry

Materials Chemistry

Environmental Sciences

DOI

10.1002/chem.202301854

PubMed

37548167

More information

Latest update

3/7/2024 9