Sayed Mostafa A, Abdelhameed Reda M, Badr Ibrahim H A, Abdel-Aziz Ali M
Chemistry Department, Faculty of Science, Ain Shams University, Cairo, 11566, Egypt.
Applied Organic Chemistry Department, National Research Centre, Dokki, Giza, Egypt.
Sci Rep. 2025 Jun 5;15(1):19734. doi: 10.1038/s41598-025-04085-2.
In this research, we developed a novel composite material, Ce-BTC@MCC, by combining a metal-organic framework (Ce-BTC) with microcrystalline cellulose (MCC), a recyclable natural product. The surface features of the novel Ce-BTC@MCC composite were carefully investigated through infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), and N-adsorption/desorption. The ratio of Ce-BTC to MCC in the composite was systematically optimized based on adsorption performance experiments. The developed Ce-BTC@MCC composite significantly outperformed its individual components (Ce-BTC and MCC) in removing Congo Red (CR) dye from water. This enhanced performance is due to the synergistic effect between Ce-BTC and MCC, which enhances the adsorption capacity of the designed composite. A comprehensive investigation was conducted to assess the impact of various parameters, including contact time, pH, temperature, and initial concentration, on the adsorption process. The experimental adsorption data for CR were well-described by the Langmuir isotherm model. The optimized Ce-BTC@MCC composite (20 wt% Ce-BTC content) demonstrated a remarkable maximum adsorption capacity of 926.3 mg/g for CR. The adsorption kinetics followed a pseudo-second-order model (R = 0.988), and both intraparticle and boundary layer diffusion influenced the rate-limiting step of the adsorption process. A plausible mechanism for the adsorption of CR onto the Ce-BTC@MCC surface was proposed. The results highlight the effectiveness, selectivity, and reusability of the eco-friendly Ce-BTC@MCC adsorbent for removing CR from different real water samples.
在本研究中，我们通过将金属有机框架（Ce-BTC）与微晶纤维素（MCC，一种可回收的天然产物）相结合，开发了一种新型复合材料Ce-BTC@MCC。通过红外光谱（FTIR）、X射线衍射（XRD）、扫描电子显微镜（SEM）、能量色散X射线光谱（EDX）和N吸附/脱附对新型Ce-BTC@MCC复合材料的表面特征进行了仔细研究。基于吸附性能实验系统地优化了复合材料中Ce-BTC与MCC的比例。所开发的Ce-BTC@MCC复合材料在从水中去除刚果红（CR）染料方面明显优于其各个组分（Ce-BTC和MCC）。这种增强的性能归因于Ce-BTC和MCC之间的协同效应，这提高了设计复合材料的吸附能力。进行了全面研究以评估包括接触时间、pH值、温度和初始浓度在内的各种参数对吸附过程的影响。CR的实验吸附数据可以很好地用Langmuir等温线模型描述。优化后的Ce-BTC@MCC复合材料（Ce-BTC含量为20 wt%）对CR表现出926.3 mg/g的显著最大吸附容量。吸附动力学遵循准二级模型（R = 0.988），颗粒内扩散和边界层扩散都影响了吸附过程的限速步骤。提出了CR在Ce-BTC@MCC表面吸附的合理机制。结果突出了环保型Ce-BTC@MCC吸附剂从不同实际水样中去除CR的有效性、选择性和可重复使用性。
