Regulation and photocatalytic degradation mechanism of a hydroxyl modified UiO-66 type metal organic framework

Shixiong Li; Shaolong Yang; Guichun Liang; Mulun Yan; Chengting Wei; Yan Lu

doi:10.1039/d3ra00004d

Regulation and photocatalytic degradation mechanism of a hydroxyl modified UiO-66 type metal organic framework

RSC Adv. 2023 Feb 10;13(8):5273-5282. doi: 10.1039/d3ra00004d. eCollection 2023 Feb 6.

Authors

Shixiong Li^{1

2}, Shaolong Yang^{1

2}, Guichun Liang¹, Mulun Yan¹, Chengting Wei¹, Yan Lu¹

Affiliations

¹ School of Mechanical and Resource Engineering, Wuzhou University Wuzhou Guangxi 543002 P. R. China lsx1324@163.com.
² School of Chemistry and Chemical Engineering, Guangxi University Nanning 530004 P. R. China.

Abstract

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.