Synthesis of novel magneto-hybrid polyoxometalate composite membrane with simultaneous photocatalytic self-cleaning and antifouling functionalities

• Published in: Frontiers of chemical science and engineering Vol. 17; no. 10; pp. 1450 - 1459
• Main Authors: Tan, Nee Nee, Ng, Qi Hwa, Enche Ab Rahim, Siti Kartini, Ahmad, Abdul Latif, Hoo, Peng Yong, Chew, Thiam Leng
• Format: Journal Article
• Language: English
• Published: Beijing Higher Education Press 01.10.2023; Springer Nature B.V
• Subjects: Antifouling; Chemistry; Chemistry and Materials Science; Cleaning; Humic acids; Hydrophilicity; Industrial Chemistry/Chemical Engineering; Magnetic properties; Membranes; Nanocomposites; Nanoparticles; Nanotechnology; Photocatalysis; Polyethersulfones; Polyoxometallates; Research Article; Ultraviolet radiation; Water treatment; magnetic and photocatalytic responsiveness; magneto-hybrid polyoxometalate nanocomposite; composite membrane; self-cleaning; antifouling
• ISSN: 2095-0179; 2095-0187
• DOI: 10.1007/s11705-023-2310-3

Membrane technology is ideal for removing aqueous humic acid, but humic acid deposits cause membrane fouling, a significant challenge that limits its application. Herein, this work proposed an alternative approach to the controllably magnetically induced magneto-hybrid polyoxometalate (magneto-HPOM) nanocomposite migration toward the polyethersulfone (PES) membrane surface under a magnetic field to enhance the self-cleaning and antifouling functionalities of the membrane. Before incorporating magneto-HPOM nanocomposite into the PES casting solution, functionalized magnetite nanoparticles (F-MNP) were first coated with HPOM photocatalyst to fabricate a magneto-HPOM-PES membrane. It was shown that the apparent impacts of this novel magneto-HPOM-PES membrane on the hydrophilic behavior and photocatalytic properties of the magneto-HPOM nanocomposite improve the hydrophilicity, separation performance, antifouling and self-cleaning properties of the membrane compared with neat PES membrane. Furthermore, after exposure to ultraviolet light, the magneto-HPOM-PES membrane can be recovered after three cycles with a flux recovery ratio of 107.95%, 100.06%, and 95.56%, which is attributed to the temporal super hydrophilicity effect. Meanwhile, the magneto-HPOM-PES membrane could efficiently maintain 100% humic acid rejection for the first and second cycles and 99.81% for the third cycle. This study revealed a novel approach to fabricating membranes with high antifouling and self-cleaning properties for water treatment.