Wang Chao, Feng Xuezhen, Shang Shibin, Liu He, Song Zhanqian, Zhang Haibo
Institute of Chemical Industry of Forest Products, CAF, National Engineering Lab. for Biomass Chemical Utilization, Key Lab. of Chemical Engineering of Forest Products, National Forestry and Grassland Administration, Key Lab. of Biomass Energy and Material, Jiangsu Province, Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing 210042, China.
Institute of Chemical Industry of Forest Products, CAF, National Engineering Lab. for Biomass Chemical Utilization, Key Lab. of Chemical Engineering of Forest Products, National Forestry and Grassland Administration, Key Lab. of Biomass Energy and Material, Jiangsu Province, Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing 210042, China.
Bioresour Technol. 2023 Nov;388:129781. doi: 10.1016/j.biortech.2023.129781. Epub 2023 Sep 18.
The lignin-based metal-organic framework (UIO-g-NL) was prepared by a Schiff base reaction of aminated lignin and the zirconium cluster-based MOF (UIO-66-NH) as an adsorbent of methyl orange (MO). The results showed that UIO-g-NL maintained the original crystal structure and aminated lignin was successfully introduced after functionalization. UIO-g-NL selectively adsorbed MO from a mixed solution 50 mg/L MO and 50 mg/L methylene blue (MB), with an adsorption efficiency of nearly 100%. In a mixed solution 250 mg/L MB and 250 mg/L MO, UIO-g-NL adsorbed both dyes with 1120.70 mg/g for MB and 961.54 mg/g for MO. Hydrogen bonding, π-π and NH-π interactions, and electrostatic attraction contribute to the MO adsorption by UIO-g-NL. In the MO/MB mixture, MO adsorption by UIO-g-NL follows the pseudo-second-order kinetic and Freundlich isotherm models, which is an endothermic, spontaneous, and feasible adsorption process. Furthermore, the MO adsorption efficiency of UIO-g-NL remained high (>90%) after six re-use cycles.
通过胺化木质素与锆簇基金属有机框架（UIO-66-NH）的席夫碱反应制备了木质素基金属有机框架（UIO-g-NL），并将其作为甲基橙（MO）的吸附剂。结果表明，UIO-g-NL保持了原始晶体结构，功能化后成功引入了胺化木质素。UIO-g-NL从50 mg/L MO和50 mg/L亚甲基蓝（MB）的混合溶液中选择性吸附MO，吸附效率接近100%。在250 mg/L MB和250 mg/L MO的混合溶液中，UIO-g-NL对两种染料都有吸附，对MB的吸附量为1120.70 mg/g，对MO的吸附量为961.54 mg/g。氢键、π-π和NH-π相互作用以及静电引力有助于UIO-g-NL对MO的吸附。在MO/MB混合物中，UIO-g-NL对MO的吸附遵循准二级动力学和Freundlich等温线模型，这是一个吸热、自发且可行的吸附过程。此外，UIO-g-NL在六个重复使用循环后对MO的吸附效率仍保持较高水平（>90%）。
