Asiri Abdullah M, Pugliese Valerio, Petrosino Francesco, Khan Sher Bahadar, Alamry Khalid Ahmad, Alfifi Soliman Y, Marwani Hadi M, Alotaibi Maha M, Mukherjee Debolina, Chakraborty Sudip
Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia.
Department of Computer Engineering, Modeling, Electronics and Systems (D.I.M.E.S.), University of Calabria, Via-P. Bucci, Cubo-42A, 87036 Rende, Italy.
Polymers (Basel). 2022 Feb 7;14(3):636. doi: 10.3390/polym14030636.
This work aimed to investigate the degradation performance of natural cellulose acetate (CA) membranes filled with ZnO nanostructures. Photocatalytic degradation of reactive toxic dye methylene blue (MB) was studied as a model reaction using UV light. A CA membrane was previously casted and fabricated through the phase inversion processes and laboratory-synthesized ZnO microparticles as filler. The prepared membrane was characterized for pore size, ultrafiltration (UF) performance, porosity, morphology using scanning electron micrographs (SEM), water contact angle and catalytic degradation of MB. The prepared membrane shows a significant amount of photocatalytic oxidation under UV. The photocatalytic results under UV-light radiation in CA filled with ZnO nanoparticles (CA/ZnO) demonstrated faster and more efficient MB degradation, resulting in more than 30% of initial concentration. The results also revealed how the CA/ZnO combination effectively improves the membrane's photocatalytic activity toward methylene blue (MB), showing that the degradation process of dye solutions to UV light is chemically and physically stable and cost-effective. This photocatalytic activity toward MB of the cellulose acetate membranes has the potential to make these membranes serious competitors for removing textile dye and other pollutants from aqueous solutions. Hence, polymer-ZnO composite membranes were considered a valuable and attractive topic in membrane technology.
这项工作旨在研究填充有ZnO纳米结构的天然醋酸纤维素（CA）膜的降解性能。以活性有毒染料亚甲基蓝（MB）的光催化降解作为模型反应，使用紫外光进行研究。预先通过相转化过程浇铸并制备了CA膜，并使用实验室合成的ZnO微粒作为填料。使用扫描电子显微镜（SEM）对制备的膜进行孔径、超滤（UF）性能、孔隙率、形态表征，测量其水接触角，并研究其对MB的催化降解。制备的膜在紫外光下显示出大量的光催化氧化作用。在填充有ZnO纳米颗粒的CA（CA/ZnO）中，紫外光辐射下的光催化结果表明，MB的降解更快且更有效，初始浓度降低了30%以上。结果还表明，CA/ZnO组合如何有效地提高了膜对亚甲基蓝（MB）的光催化活性，表明染料溶液对紫外光的降解过程在化学和物理上是稳定且具有成本效益的。醋酸纤维素膜对MB的这种光催化活性有可能使这些膜成为从水溶液中去除纺织染料和其他污染物的有力竞争者。因此，聚合物-ZnO复合膜被认为是膜技术中一个有价值且有吸引力的课题。
