Maruthupandy Muthuchamy, Rajivgandhi Govindan, Muneeswaran Thillaichidambaram, Vasantharaj Seerangaraj, Sandoval-Hevia Gabriela, Muneeswaran Muniyandi, Radzi Nurul Asyikin Binti Mohamed
Institute of Power Engineering, Department of Electrical Electronics, College of Engineering, Universiti Tenaga Nasional, Jalan Ikram-UNITEN, 43000 Kajang, Malaysia.
Departamento de Ingenieria Quimica, Biotecnologia y Materiales, Facultad de Ciencias Fisicas y Matematicas, Universidad de Chile, Avenida Beauchef 851, Santiago 8370456, Chile.
Int J Biol Macromol. 2025 May;307(Pt 3):142132. doi: 10.1016/j.ijbiomac.2025.142132. Epub 2025 Mar 14.
The pervasive occurrence of various organic contaminants, primarily dye molecules, in water bodies was caused by multiple dye industrial wastes, which recently sparked great scientific concern and public awareness due to their potential to spread these contaminants' resistant genes and pose a risk to humans. Cross-linking graphene in chitosan resulted in nanocomposites with varied morphology, increased surface area, and improved photocatalytic removal of bromothymol blue and bromophenol blue. The degradation capacity of photocatalysts at various concentrations (25 and 50 mg) was 96.2 % (170 min) and 99.2 % (80 min) with bromothymol blue, revealing a two-fold variation based on the Gr/Cts NCs concentrations. Similar to bromophenol blue dye molecules, which showed a two-fold enhancement of degradation based on graphene/chitosan nanocomposites concentration, bromophenol blue dye molecules were 95.3 % and 98.6 % at 240 and 120 min time intervals. The bromophenol blue and bromothymol blue dyes degraded according to the Langmuir adsorption model. Furthermore, the minimal cytotoxicity of graphene/chitosan nanocomposites to the human lung epithelial cell line and the human macrophage-like cell line indicates that the material is safe. This study reveals that the degrading properties of graphene/chitosan nanocomposites significantly improve as the concentration increases.
水体中各种有机污染物（主要是染料分子）的普遍存在是由多种染料工业废物造成的，这些废物最近引发了科学界的高度关注和公众意识，因为它们有可能传播这些污染物的抗性基因并对人类构成风险。壳聚糖中的交联石墨烯产生了具有不同形态、增加的表面积以及改善的光催化去除溴百里酚蓝和溴酚蓝能力的纳米复合材料。在不同浓度（25和50毫克）下，光催化剂对溴百里酚蓝的降解能力分别为96.2%（170分钟）和99.2%（80分钟），这表明基于Gr/Cts NCs浓度存在两倍的差异。与溴酚蓝染料分子类似，基于石墨烯/壳聚糖纳米复合材料的浓度，其降解能力提高了两倍，在240分钟和120分钟的时间间隔内，溴酚蓝染料分子的降解率分别为95.3%和98.6%。溴酚蓝和溴百里酚蓝染料的降解符合朗缪尔吸附模型。此外，石墨烯/壳聚糖纳米复合材料对人肺上皮细胞系和人巨噬细胞样细胞系的细胞毒性极小，这表明该材料是安全的。这项研究表明，随着浓度的增加，石墨烯/壳聚糖纳米复合材料的降解性能显著提高。
