Fabrication of a Novel PES/CNTs@TiO₂ Membrane Combining Photo-Electrocatalysis and Filtration for Organic Pollutant Removal.

IF 3.3 4区工程技术 Q2 CHEMISTRY, PHYSICAL

Membranes Pub Date : 2025-03-10 DOI:10.3390/membranes15030090

Yue Lu, Xuan Xing, Yi Jiang, Jianxin Xia

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引用次数: 0

Abstract

Membrane filtration has been widely used in wastewater treatment; contaminants attached to the membrane surface led to flux loss and service life reduction. In the present study, a photo-electrocatalysis membrane was fabricated with CNTs@TiO₂ deposited on a commercial polyethersulfone (PES) membrane (PES/CNTs@TiO₂). XRD and SEM characterization proved that the CNTs@TiO₂ composites were successfully fabricated using the one-pot hydrothermal method. Additionally, vacuum filtration was used to distribute the as-prepared powder on the PES membrane. In CNTs@TiO₂, TiO₂ particles were deposited on the outer layer of CNTs, which benefits light adsorption and photocatalytic reaction. The hydrophilicity, light absorption ability, and electron transfer rate of the PES/CNTs@TiO₂ membrane were enhanced compared with the pristine PES membranes. Organic compound removal was improved in the photo-electrocatalysis filtration system with the improvement of 32.41% for methyl orange (MO), 26.24% for methyl blue (MB), 7.86% for sulfamethoxazole (SMZ), and 25.19% for florfenicol (FF), respectively. Moreover, the hydrophilicity and removal rate could be restored after pure water cleaning, demonstrating excellent reusability. The quenching experiment showed that ·OH and ·O₂^- were the main reactive oxygen species. This work provides a convenient form of photo-electrocatalysis filtration technology using modified commercial membranes, which has great potential for practical application.

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新型PES/CNTs@TiO2光电催化与过滤复合膜去除有机污染物的研究。

膜过滤技术在污水处理中得到了广泛的应用；污染物附着在膜表面导致通量损失和使用寿命降低。在本研究中，将CNTs@TiO2沉积在商用聚醚砜（PES/CNTs@TiO2）膜上制备了一种光电催化膜。XRD和SEM表征表明，采用一锅水热法制备了CNTs@TiO2复合材料。此外，采用真空过滤将制备好的粉末分散在PES膜上。在CNTs@TiO2中，TiO2颗粒沉积在CNTs的外层，有利于光吸附和光催化反应。与原始PES膜相比，PES/CNTs@TiO2膜的亲水性、光吸收能力和电子传递速率均有所提高。在光电催化过滤系统中，甲基橙（MO）、甲基蓝（MB）、磺胺甲恶唑（SMZ）和氟苯尼科（FF）的有机物去除率分别提高了32.41%、26.24%、7.86%和25.19%。经纯水清洗后，亲水性和去除率均可恢复，具有良好的可重复使用性。猝灭实验表明，·OH和·O2-是主要的活性氧。本研究提供了一种方便的利用改性商用膜的光电催化过滤技术，具有很大的实际应用潜力。

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来源期刊

Membranes Chemical Engineering-Filtration and Separation

CiteScore

6.10

自引率

16.70%

发文量

1071

审稿时长

11 weeks

期刊介绍： Membranes (ISSN 2077-0375) is an international, peer-reviewed open access journal of separation science and technology. It publishes reviews, research articles, communications and technical notes. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. Full experimental and/or methodical details must be provided.