Polyoxometalates (POMs) have emerged as a promising modification material for high-performance membranes with increased hydrophilicity, permeability, and potential catalytic properties. In the present work, phosphotungstic acid was successfully modified onto the polysulfone-Al₂O₃ composite membrane through a simple surface modification method. The successful modification of POM was confirmed by scanning electron microscopy, Fourier transform infrared spectroscopy, and water contact angle measurement. The membrane permeation performance toward rhodamine B was evaluated. An evident enhancement of both water flux and dye rejection was obtained. Moreover, the retained dye on the membrane surface could be easily degraded through photoirradiation owing to the photocatalytic activities of POM. The POM-modified membrane has a desirable regeneration ability for six repetition cycles. The antifouling performance was also investigated using humic acid aqueous solution under 1 bar. The POM-modified membrane exhibited the water flux 3.8 times higher than the unmodified membrane. Compared with the 23.8% flux recovery ratio (FRR) of the unmodified membrane, a 67.1% FRR of POM-modified membrane was attained. The enhanced water permeability, superhydrophilicity, and antifouling performance of an as-prepared membrane made it a promising candidate for wastewater purification.

中文翻译：

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一种具有光催化、超亲水和防污性能的三元复合聚砜膜用于高效水超滤

多金属氧酸盐 (POM) 已成为一种很有前途的高性能膜改性材料，具有更高的亲水性、渗透性和潜在的催化性能。在目前的工作中，磷钨酸被成功地改性到聚砜-Al ₂ O _3上。复合膜通过简单的表面改性方法。通过扫描电子显微镜、傅里叶变换红外光谱和水接触角测量证实了 POM 的成功改性。评价了对罗丹明B的膜渗透性能。获得了水通量和染料排斥两者的明显增强。此外，由于 POM 的光催化活性，膜表面保留的染料很容易通过光辐照降解。POM 改性膜在六个重复循环中具有理想的再生能力。还使用 1 bar 下的腐植酸水溶液研究了防污性能。POM 改性膜的水通量是未改性膜的 3.8 倍。与23相比。未改性膜的通量恢复率 (FRR) 为 8%，而 POM 改性膜的 FRR 为 67.1%。所制备的膜具有增强的透水性、超亲水性和防污性能，使其成为废水净化的有希望的候选者。