A propionate-functionalized polyoxovanadate K2[V10O16(OH)6(CH3CH2CO2)6]·20H2O: As catalyst for degradation of methylene blue

• Published in: Journal of molecular structure Vol. 1195; pp. 184 - 188
• Main Authors: Wang, Ke, He, Yuzan, Zhao, Yanxin, Ma, Pengtao, Wang, Jingping
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 05.11.2019
• Subjects: Carboxylate ligands; Degradation; Polyoxovanadate; Self-assembly; Carboxylate ligands; Degradation; Polyoxovanadate; Self-assembly
• ISSN: 0022-2860; 1872-8014
• DOI: 10.1016/j.molstruc.2019.05.130

By self-assembly of the KVO3 raw material with propionate ligand using hydrazine hydrate as reducing agents in conventional aqueous solution, a novel propionate-functionalized polyoxovanadate K2[V10O16(OH)6(CH3CH2CO2)6]·20H2O (1) has been successfully synthesized and further structurally characterized by IR spectrum, powder X-ray diffraction (PXRD), thermogravimetric (TG), and single-crystal X-ray diffraction analysis. Structural analysis demonstrates that the polyanion [V10O16(OH)6(CH3CH2CO2)6]2− of 1 is composed of the {V10}-based polyoxovanadate which is further anchored by 6 propionate ligands to form a propionate-stabilized decavanadate. The {V10} building unit of 1 is completely different from the classical [V10O28]6− ion. The catalytic property of 1 for the degradation of methylene blue (MB) was investigated, and the result indicates that 1 exhibits excellent catalytic activity for the degradation of MB. [Display omitted] •Two same {V5} subunits are interlinked in staggered pattern forming {V10} unit.•The {V10} building unit is further anchored by 6 propionate ligands.•Compound 1 shows excellent activity for the degradation of methylene blue.