Synthesis of flower-shaped cyclodextrin microporous organic networks for selective recovery of acetophenone and 1-phenylethanol from petrochemical effluents

• Published in: Chemical engineering journal (Lausanne, Switzerland : 1996) Vol. 475; p. 146344
• Main Authors: Yue, Yun-Da, Gao, Yu, Fu, Shi-Ya, Cui, Yuan-Yuan, Yang, Cheng-Xiong
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.11.2023
• Subjects: Adsorption; Biomass-derivatives; Cyclodextrin; Microporous organic network; Separation; Cyclodextrin; Separation; Adsorption; Microporous organic network; Biomass-derivatives
• ISSN: 1385-8947; 1873-3212
• DOI: 10.1016/j.cej.2023.146344

•Nine CD-MONs are synthesized for efficient recovery of AP and PE from PO/SM effluent.•Flower-shaped DEB-γ-CD-MON displays large adsorption capacity and good selectivity for AP toward PE.•π-π interaction accounts for the preferential adsorption of AP over PE. Fabrication of efficient and renewable biomass-derivatives-based porous materials with large surface area, good stability and selectivity for recovering acetophenone (AP) and 1-phenylethanol (PE) from petrochemical by-products is of great significance and challenge. In this work, nine novel cyclodextrins-based microporous organic networks (CD-MONs) are designed and synthesized by choosing various CD-based building blocks and aromatic alkynes. Among them, a flower-shaped DEB-γ-CD-MON not only retains the cage-type cavity and the high density of hydroxyl sites within γ-CD, possesses the large surface area, outstanding chemical robustness and strong hydrophobicity, but also offers high AP adsorption capacity (1.93 mmol g−1), good AP/PE selectivity (8.1), and recycle stability both in batch and continuous adsorption modes. The experimental and theoretical results indicate that the hydrogen bonding, π-π stacking and van der Waals interaction between adsorbents and adsorbates are favorable for binding AP toward PE. This work not only provides a biomass-derivatives-based adsorbent for the separation and recovery of AP and PE from PO/SM waste effluent, but also breaks the limitation of the original structure and characteristic of natural biomass to realize added value in biomass valorization.