Belhaj Jihene, Khiari Ramzi, García-Caballero Valentín, Romero Antonio A, García Araceli
Nanoval FQM-383 Research Group, Organic Chemistry Department, University of Córdoba, Marie Curie (C-3) Building, Crta. Nnal. km 396, E-14014 Córdoba, Spain.
National Engineering School of Monastir, University of Monastir, Monastir 5019, Tunisia.
Polymers (Basel). 2025 Jun 22;17(13):1737. doi: 10.3390/polym17131737.
The synthesis of cellulose extracted from agricultural waste, specifically almond and fig tree trimmings, and its combination with ZnO nanoparticles to form cellulose/ZnO composites was studied. These adsorbents/photocatalysts were fully characterized, confirming not only the effective deposition of zinc oxide nanoparticles on the cellulose surface but also the improvement in homogeneity and lower agglomeration and size of ZnO particles grown on these fibers (crystallites were 43 ± 12 nm for pristine ZnO and 13-26 nm for composites). The efficacy of these composites was evaluated against methylene blue (MB), methyl orange (MO), and bromophenol blue (BB), this study being the first time that BB removal results have been reported using dual photo-adsorptive cellulosic composites. After 20 min, removals of approximately 45% were achieved for the anionic dyes MO and BB under UV light and up to 65% for MB with either applied radiation, indicating a clear adsorption mechanism for this cationic dye. A reusability study was conducted for the BB removal system, with only a 15-19% loss in BB removal capacity under UV irradiation after the third reuse. These results demonstrated the potential and efficiency of cellulose/ZnO composites as promising photocatalysts for textile wastewater treatment, providing a sustainable and interesting approach to mitigate dye pollution.
研究了从农业废弃物（特别是杏仁和无花果树修剪枝）中提取纤维素及其与氧化锌纳米颗粒结合形成纤维素/氧化锌复合材料的过程。对这些吸附剂/光催化剂进行了全面表征，不仅证实了氧化锌纳米颗粒在纤维素表面的有效沉积，还证实了在这些纤维上生长的氧化锌颗粒的均匀性得到改善，团聚和尺寸降低（原始氧化锌的微晶为43±12纳米，复合材料的微晶为13 - 26纳米）。评估了这些复合材料对亚甲基蓝（MB）、甲基橙（MO）和溴酚蓝（BB）的去除效果，本研究首次报道了使用双光吸附纤维素复合材料去除BB的结果。20分钟后，在紫外光下，阴离子染料MO和BB的去除率约为45%，而对于MB，无论使用何种辐射，去除率高达65%，这表明这种阳离子染料存在明显的吸附机制。对BB去除系统进行了可重复使用性研究，第三次重复使用后，在紫外照射下，BB去除能力仅损失15 - 19%。这些结果证明了纤维素/氧化锌复合材料作为有前景的光催化剂用于纺织废水处理的潜力和效率，为减轻染料污染提供了一种可持续且有趣的方法。
