title: β-Cyclodextrin functionalized polystyrene porous monoliths for separating phenol from wastewater.
abstract: A β-cyclodextrin (β-CD) functionalized polystyrene porous monolith was prepared by the following procedure: First, β-CD was modified with allyl bromide leading to allyl-β-cyclodextrin (allyl-β-CD); then a concentrated emulsion was prepared using a mixture of allyl-β-CD, styrene, and divinyl benzene as the continuous phase and water as the dispersed phase. In the third step, a β-cyclodextrin (β-CD) functionalized polystyrene porous monolith was obtained by copolymerization of allyl-β-CD and styrene followed by removal of the water phase. Since the allyl-β-CD contained both hydrophilic and hydrophobic groups, it tended to move towards the water/oil interface. As a result, the internal surfaces of the porous monolith were enriched with β-CD. This enrichment was indicated by X-ray photoelectron spectroscopy characterization. The high content of β-CD and the high specific surface area of the porous monolith both contributed to a high adsorption capacity. For example, the maximum adsorption of phenol was 5.74 mg/g. Importantly, the porous monolith could be easily regenerated and recycled through desorption with ethanol and it was found that the adsorption properties remained stable for at least five adsorption/desorption cycles.
authors: Key Laboratory of Carbon Fiber and Functional Polymers (Beijing University of chemical Technology), Ministry of Education, College of Materials Science and Engineering, Beijing University of chemical Technology, Beijing 100029, PR China.
authors: Jiaxi
authors: J
authors: Han
authors: Key Laboratory of Carbon Fiber and Functional Polymers (Beijing University of chemical Technology), Ministry of Education, College of Materials Science and Engineering, Beijing University of chemical Technology, Beijing 100029, PR China.
authors: Kaijun
authors: K
authors: Xie
authors: Key Laboratory of Carbon Fiber and Functional Polymers (Beijing University of chemical Technology), Ministry of Education, College of Materials Science and Engineering, Beijing University of chemical Technology, Beijing 100029, PR China.
authors: Zhongjie
authors: Z
authors: Du
authors: Key Laboratory of Carbon Fiber and Functional Polymers (Beijing University of chemical Technology), Ministry of Education, College of Materials Science and Engineering, Beijing University of chemical Technology, Beijing 100029, PR China.
authors: Wei
authors: W
authors: Zou
authors: Key Laboratory of Carbon Fiber and Functional Polymers (Beijing University of chemical Technology), Ministry of Education, College of Materials Science and Engineering, Beijing University of chemical Technology, Beijing 100029, PR China. Electronic address: zhangch@mail.buct.edu.cn.
authors: Chen
authors: C
authors: Zhang
mesh_terms: D003505:Cyclodextrins / Q000737:chemistry; D019800:Phenol / Q000737:chemistry*; D011137:Polystyrenes / Q000737:chemistry*; D016062:Porosity; D062065:Wastewater / Q000737:chemistry*
chemical_list: D003505:Cyclodextrins; D019800:Phenol; D011137:Polystyrenes; D062065:Wastewater
keywords: 2,4,6-Trichlorophenol (PubChem CID: 6914); Adsorption; Allyl bromide (PubChem CID: 7841); Concentrated emulsion polymerization; Divinyl benzene (PubChem CID: 66041); Phenol; Phenol (PubChem CID: 996); Porous; Styrene (PubChem CID: 7501); p-Chlorophenol (PubChem CID: 4684); β-Cyclodextrin; β-Cyclodextrin (PubChem CID: 444041)