State Key Laboratory of Food Science and Resources, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China; Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China; International Joint Laboratory on Food Safety, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China.
College of Food Science and Engineering, Wuhan Polytechnic University, Wuhan, People's Republic of China.
Food Chem. 2024 Jul 30;447:138977. doi: 10.1016/j.foodchem.2024.138977. Epub 2024 Mar 11.
In this study, a novel luminescent carbon dot-rooted polysaccharide hydrogel (CDs@CCP hydrogel) was prepared by crosslinking cellulose, chitosan (CS), and polyvinyl alcohol (PVA) for simultaneous fluorescent sensing and adsorption of Cu. The crosslinking of these low-cost, polysaccharide polymers greatly enhance the mechanical strength of the composite hydrogel while making the polysaccharide-based adsorbent easy to reuse. This composite hydrogel exhibited an excellent adsorption capacity (124.7 mg∙g) for residual Cu in water, as well as a sensitive and selective fluorescence response towards Cu with a good linear relationship (R > 0.97) and a low detection limit (LOD) of 0.02 μM. The adsorption isotherms, adsorption kinetics, and thermodynamics studies were also conducted to investigate the adsorption mechanism. This composite hydrogel offers an efficient tool for simultaneous monitoring and treatment of Cu from wastewater.
在这项研究中，通过交联纤维素、壳聚糖（CS）和聚乙烯醇（PVA）制备了一种新型的发光碳点-多糖水凝胶（CDs@CCP 水凝胶），用于同时荧光传感和吸附 Cu。这些低成本多糖聚合物的交联极大地增强了复合水凝胶的机械强度，同时使基于多糖的吸附剂易于重复使用。这种复合水凝胶对水中残留的 Cu 具有优异的吸附能力（124.7 mg·g），并且对 Cu 具有敏感和选择性的荧光响应，具有良好的线性关系（R>0.97）和低检测限（LOD）为 0.02 μM。还进行了吸附等温线、吸附动力学和热力学研究，以研究吸附机制。这种复合水凝胶为同时监测和处理废水中的 Cu 提供了一种有效的工具。
