Synthesis of porous dimethoxypillar[5]arene knitted β-cyclodextrin copolymers for efficient adsorption of organic micropollutants. (15th June 2023)

• Record Type: Journal Article
• Authors: Li, Hengye; Han, Xingwei; Yu, Wenjie; Zhang, Lin; Bie, Wenwen; Wei, Meijie; Wang, Zhongxia; Kong, Fenying; Wang, Wei
• Is Part Of: Carbohydrate polymers. Volume 310(2023)
• Publication Date: 2023-06-15
• Subjects: β-Cyclodextrin (PubChem CID: 444041) -- 1, 4-Dimethoxybenzene (PubChem CID: 9016) -- Trifluoroacetic acid (PubChem CID: 6422) -- Benzyl bromide (PubChem CID: 7498) -- Sodium hydride (PubChem CID: 24758) -- Dimethoxypillar[5]arene (PubChem CID: 50940580) -- Nitrobenzene (PubChem CID: 7416) -- Anhydrous ferric chloride (PubChem CID: 24380) -- 2, 4-Dichlorophenol (PubChem CID: 8449) -- Bisphenol F (PubChem CID: 12111) -- Bisphenol A (PubChem CID: 6623) -- Bisphenol AF (PubChem CID: 73864); BCMBP 4, 4′-bis(chloromethyl)-1, 1′-biphenyl -- BET Brunauer-Emmett-Teller -- BnCD benzylated β-cyclodextrin -- BPA bisphenol A -- BPAF bisphenol AF -- BPF bisphenol F -- CD cyclodextrin -- COFs covalent organic frameworks -- DCP 2, 4-Dichlorophenol -- DCX α, α′-dichloro-p-xylene -- DMB 1, 4-dimethoxybenzene -- EPI epichlorohydrin -- FDA formaldehyde dimethyl acetal -- GAC granular activated carbon -- NLDFT nonlocal density functional theory -- OMPs organic micropollutants -- P[5] dimethoxypillar[5]arene -- PAFs porous aromatic frameworks -- P-CDP porous CD-polymer -- POPs porous organic polymers -- RE removal efficiency -- SEM scanning electron microscopy -- TEM transmission electron microscopic -- TFN tetrafluoroterephthalonitrile -- TGA thermogravimetric analysis; Porous organic polymers -- β-Cyclodextrin -- Dimethoxypillar[5]arene -- Adsorption -- Organic micropollutant; Polysaccharides -- Periodicals; Polysaccharides -- Periodicals; Polysaccharides -- Périodiques; Electronic journals; 547.78
• DOI: 10.1016/j.carbpol.2023.120719
• Languages: English
• ISSNs: 0144-8617

Abstract

Abstract: Herein, through knitting benzylated β-cyclodextrin (BnCD) by dimethoxypillar[5]arene (P[5]), porous copolymers (P[5]-BnCDs) containing two kinds of macrocycles were synthesized with yields not <97 %. The molar ratio of P[5]/BnCD greatly influenced the P[5]-BnCDs' porosity and adsorption performance. When the molar ratio of P[5]/BnCD was 4/1, the P[5]-BnCD (4-1), demonstrated a surface area up to 515.95 m 2 /g and showed fast adsorption kinetic, high adsorption capacity and good reusability towards the model organic micropollutants (OMPs). The adsorption fitted well with the pseudo-second-order and the Langmuir models, while the thermodynamic studies revealed spontaneous physisorption process. The adsorption mechanism was dominant by host-guest and hydrophobic interactions and the adsorption at environmentally relevant concentrations experiments showed the practicality and superiority in extraction of the OMPs at μg/L level. This study paves a way for the development of versatile porous organic polymers with multiple macrocycles for efficient removal of OMPs from water. Graphical abstract: Unlabelled Image