Li Shixiong, Yang Shaolong, Liang Guichun, Yan Mulun, Wei Chengting, Lu Yan
School of Mechanical and Resource Engineering, Wuzhou University Wuzhou Guangxi 543002 P. R. China
School of Chemistry and Chemical Engineering, Guangxi University Nanning 530004 P. R. China.
RSC Adv. 2023 Feb 10;13(8):5273-5282. doi: 10.1039/d3ra00004d. eCollection 2023 Feb 6.
Photocatalytic performance can be effectively improved by modifying the functional groups on the organic ligands of metal organic frameworks (MOFs). Herein, the hydroxyl-modified UiO-66 type MOF: UIO-66-2OH(2,3), was successfully synthesized by the method of ligand exchange by the 2,3-dihydroxyterephthalic acid and UIO-66 as raw materials. The mechanism of photocatalytic degradation of methylene blue (MB) by UIO-66-2OH(2,3) shows that the hydroxyl functional group on the organic ligand regulates its electronegativity and expands its light absorption range. The decomposition of MB is carried out in multiple steps under the oxidation of the hydroxyl radical (˙OH). This research result shows the direction for guiding the synthesis of efficient photocatalysts and clarifying the light absorption of MOFs regulated by hydroxyl functional groups.
通过修饰金属有机框架（MOFs）有机配体上的官能团，可以有效提高光催化性能。在此，以2,3-二羟基对苯二甲酸和UIO-66为原料，采用配体交换法成功合成了羟基修饰的UiO-66型MOF：UIO-66-2OH(2,3)。UIO-66-2OH(2,3)光催化降解亚甲基蓝（MB）的机理表明，有机配体上的羟基官能团调节其电负性并扩大其光吸收范围。MB的分解在羟基自由基（˙OH）的氧化作用下分多步进行。该研究结果为指导高效光催化剂的合成以及阐明羟基官能团对MOFs光吸收的调节提供了方向。
