Novel thin film nanocomposite membranes incorporated with polyoxovanadate nanocluster for high water flux and antibacterial properties

Abstract

Using interfacial polymerization (IP) of m‐phenylenediamine aqueous solution containing polyoxovanadate nanoclusters (POV) and trimesoyl chloride (TMC) in organic solution, we fabricated a novel polyamide (PA)‐ polyoxovanadate nanocluster (POV) nanocomposite membranes (PA‐POV TFN). The chemical structures and morphologies of the synthesized membranes were characterized by Fourier transform infrared (FTIR) spectroscopy, atomic force microscope (AFM), scanning electron microscopy (SEM) and water contact angle measurements. Experimental results showed that the performances of PA‐POV TFN membranes are remarkably dependent on POV incorporation in the membranes, which could be controlled by using different amounts of POV particles. Moreover, the PA‐POV TFN membranes illustrated outstanding antibacterial properties against Gram‐negative E. coli. On the other hand, the incorporation of various amounts of POV in the membranes improved the membrane separation performances (water flux and salt rejection) as well as the antibacterial activity in FO process as compared to the original thin‐film composite (TFC) polyamide membrane.

High-Performance Novel MoS2@Zeolite X Nanocomposite-Modified Thin-Film Nanocomposite Forward Osmosis Membranes: A Study of Desalination and Antifouling Performance

“…Limited water resources, climate change, the need to expand agriculture, and the growing population of the world are among the most important factors affecting the aggravation of the water crisis. − It is estimated that more than 60% of the world’s population will face water shortages by 2025. Therefore, it is necessary to study different methods of fresh water supply, including desalination, due to the abundant available sources of saline water. , Among the various methods proposed for desalination, forward osmosis is one of the membrane-based methods that has been considered by many researchers because of its advantages such as low energy consumption, less membrane fouling, and high selectivity. − Most of these advantages are due to the lack of use of hydraulic pressure in the osmosis process. In fact, in this process, the difference in osmotic pressure between the two solutions is the only driving force for the transfer of water molecules to the concentrated solution through the semipermeable membrane. − …”

High-Performance Novel Polyoxometalate-LDH Nanocomposite-Modified Thin-Film Nanocomposite Forward Osmosis Membranes: A Study of Desalination and Antifouling Performance

“…Due to the fundamental significance of the membrane within the forward osmosis system, one of the most crucial objectives for researchers is to manufacture membranes possessing elevated levels of permeability and selectivity. Moreover, the incorporation of specific attributes such as a diminished tendency toward fouling, affordability, facile cleaning procedures, notable chemical stability, and robust mechanical capabilities can confer enhanced practicality upon a given membrane. , …”

“…Moreover, the incorporation of specific attributes such as a diminished tendency toward fouling, affordability, facile cleaning procedures, notable chemical stability, and robust mechanical capabilities can confer enhanced practicality upon a given membrane. 6,7 Thin-film composite membranes have gained significant attention as a promising avenue among the diverse range of membrane types investigated in the context of desalination owing to their excellent performance. The aforementioned membranes generally comprise two primary constituents, namely, the support layer and the active layer.…”