A new La(III)-MOF: crystal structure and photodegradation of Rhodamine B

Abstract

Organic dyes have been widely used in industry but mistreatment of their use and disposal can have negative consequences on human health. A technique based on solid photocatalysts is feasible for remediating organic dyes without additional harmful byproducts or additives. Recently, metal-organic frameworks formed by the metal ions and organic linkers have been studied in the areas of photocatalysis and biomedicine. In this study, the assembly reaction of 2-CNB ligand with La(CH₃COO)₃ generated a metal-organic framework, [La(2-CNB)(CH₃COO)₂(H₂O)] _n (1, 2-CNB = 2-cyanobenzoic acid). Its high degradation efficiency makes 1 an effective photocatalyst for Rhodamine B (RhB) photodegradation under irradiation by UV light, with a degradation efficiency of 97.78% within 90 min.

KEYWORDS:

• La(III) compound
• photocatalysis
• Rhodamine B

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

The research was supported by Natural Science Basic Research Plan in Shaanxi Province of China (2022JM-075) and Three-Year Action Plan Project of Xi’an University (21XJZZ0001-11).