Construction of ternary Ag@ZnO/TiO2 fibrous membranes with hierarchical nanostructures and mechanical flexibility for water purification |
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| Affiliation: | 1. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Textiles, Donghua University, Shanghai 201620, China;2. Innovation Center for Textile Science and Technology, Donghua University, Shanghai 200051, China;1. Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai 201620, China;2. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China;3. School of Textile and Materials, Xi’an Polytechnic University, Xi’an 710048, China;4. Key Laboratory of High Performance Fibers and Products Ministry of Education, Donghua University, Shanghai 201620, China;5. Nanofibers Research Center, Modern Textile Institute, Donghua University, Shanghai 200051, China |
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| Abstract: | Rational design of semiconductor membrane photocatalyst with good mechanical flexibility and excellent photocatalytic activity is of significance for environmental remediation. Herein, flexible Ag@ZnO/TiO2 fibrous membranes with hierarchical nanostructures were fabricated through combining a simple electrospinning method and subsequent hydrothermal reaction and photodeposition process. In the ternary nanocomposite, ZnO nanorods were firmly anchored onto TiO2 nanofibers, while Ag nanoparticles were evenly decorated on the surface of both ZnO and TiO2. Benefiting from the improved light absorption, large surface area, and effective charge separation, the resultant Ag@ZnO/TiO2 membranes displayed superior photocatalytic degradation efficiency of 91.6% toward tetracycline hydrochloride within 1 h, and also exhibited prominent antibacterial activity with a 6.5 log inactivation of E. coli after 1 h simulated solar light exposure. Significantly, the membrane photocatalyst still preserved structural integrity and mechanical flexibility after utilization. This study provides an alternative approach for designing and synthesizing flexible TiO2-based membrane photocatalysts toward high-efficiency water purification. |
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| Keywords: | Flexible nanofibrous membranes Hierarchical nanostructures Photocatalysis Water purification |
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