Shenyang Pharmaceutical University, China.
Third Institute of Oceanography, Ministry of Natural Resources, China.
Int J Biol Macromol. 2024 Aug;274(Pt 1):133209. doi: 10.1016/j.ijbiomac.2024.133209. Epub 2024 Jun 19.
This study synthesized a robust, magnetically responsive hydrogel from Sophora flavescens-modified cellulose and chitosan, employing Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetric analysis (TGA and DTG), and scanning electron microscopy (SEM) to confirm the preservation of cellulose's intrinsic properties and the hydrogel's remarkable elasticity, toughness, and porosity. These hydrogels integrate cellulose's structural backbone with functional moieties from chitosan, enhancing adsorption capabilities for Cu ions and Congo red (CR) dye. Kinetic and thermodynamic analyses reveal that adsorption is spontaneous and endothermic, following a pseudo-second-order model and the Freundlich isotherm. Notably, Cu adsorption capacity increases with pH, while CR adsorption initially decreases before rising, demonstrating the hydrogels' potential as effective, sustainable adsorbents for removing pollutants from water.
本研究通过傅里叶变换红外光谱（FTIR）、X 射线衍射（XRD）、热重分析（TGA 和 DTG）和扫描电子显微镜（SEM），从苦参改性纤维素和壳聚糖合成了一种稳健的、对磁性有响应的水凝胶，以确认纤维素固有性质的保留和水凝胶的显著弹性、韧性和多孔性。这些水凝胶将纤维素的结构骨架与壳聚糖的功能部分结合在一起，提高了对 Cu 离子和刚果红（CR）染料的吸附能力。动力学和热力学分析表明，吸附是自发的和吸热的，遵循准二级模型和 Freundlich 等温线。值得注意的是，Cu 吸附容量随 pH 值增加而增加，而 CR 吸附最初下降后上升，表明水凝胶作为从水中去除污染物的有效、可持续吸附剂具有潜力。
