Bio-synthesis of molecularly imprinted membrane with photo-regeneration availability for selective separation applications |
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Authors: | J. Lu Y.-Y. Qin Y.-L. Wu Z. Zhu M.-N. Chen Y.-S. Yan C.-X. Li |
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Affiliation: | 1. Institute of Green Chemistry and Chemical Technology, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, China;2. Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China;3. Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China;4. School of Energy and Environment, City University of Hong Kong Tat Chee Avenue, Kowloon, Hong Kong, China |
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Abstract: | Since the in-depth exploration of molecularly imprinted membranes (MIMs), compatibility between high selectivity and superior regeneration has been always the focus. Here we propose, based on biomimetic self-polymerization of dopamine, highly specific, self-cleaning, and interfacial-stable g-C3N4/Ag3PO4/PDA-composited molecularly imprinted membranes (C/A/D-MIMs) for enhanced treatment of fit-for-purpose water. Ciprofloxacin (CFX) was selected as a representative target because of its potential toxic effect on the microorganism, which will inevitably weaken the traditional biological-based water treatment. Besides superior antifouling performance, remarkable permselectivity (βNFX/CFX = 1.65, βEFX/CFX = 1.90, and βOFX/CFX = 2.08) and flux regeneration rate (84.4% after photo-regeneration) could be ascribed to (i) effective formation of molecularly imprinted sites by self-polymerization of dopamine, (ii) synergism of polydopamine in constructing Z-scheme heterojunction configuration, as well as (iii) bio-adhesion of polydopamine in coupling photocatalyst and MIMs. Achievements in the present work will promote the development of highly specific and self-cleaning MIMs with considerable stability and applications in specific and selective separation. |
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Keywords: | Membrane-based separation Molecular imprinting Specific selectivity Self-cleaning Polydopamine |
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