Research Article

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2021, 14(8): 2568–2573

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https://doi.org/10.1007/s12274-020-3256-0

High flux photocatalytic self-cleaning nanosheet C3N4 membrane supported by cellulose nanofibers for dye wastewater purification

Lilong Zhang1,2, Ge Meng3, Guifang Fan1, Keli Chen2, Yulong Wu1,4 (✉), and Jian Liu5

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1 Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
2 The Key Laboratory of Bionic Engineering (Ministry of Education), Jilin University, Jilin 130012, China
3 Department of Chemistry, Tsinghua University, Beijing 100084, China
4 School of Chemical Engineering and Technology, Xinjiang University, Urumqi 830046, China
5 College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China

Keywords: high flux, nanofibers, nanosheet C3N4, photocatalytic membrane, dye wastewater
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  • Abstract
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Hazardous dye substances discharged from the textile and dyestuff industries not only threaten local the surrounding ecosystems but are also hard to degraded. We report the preparation of process for a photocatalytic membrane device that can degrade dye pollution under visible light. This filtration membrane, with a well-organized multilayer structure, simultaneously achieves continuous and flow-through separation of degradation products. Cellulose nanofibers (CNFs) were used as a template for nanosheet C3N4 (NS C3N4) preparation; the performance for the photocatalytic degradation of dyes improved as the morphology changed from bulking to nanosheet. NS C3N4 was then attached to the surface of a prepared CNF membrane via vacuum filtration. This device exhibited high efficiency (the degradation rates of both Rhodamine B and Methylene blue both reached 96%), high flux (above 160 L∙h−1∙m−2∙bar−1) and excellent stability (maintaining steady flux and high separation were maintained after 4 h). This easy-preparation, easy-scale-up, and low-cost process provides a new method of fabricating photocatalytic membrane devices for dye wastewater treatment.
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High flux photocatalytic self-cleaning nanosheet C3N4 membrane supported by cellulose nanofibers for dye wastewater purification. Nano Res. 2021, 14(8): 2568–2573 https://doi.org/10.1007/s12274-020-3256-0

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