Stable Core‐Shell UiO‐66‐NH <sub>2</sub> @Zeolitic Imidazolate Frameworks Composite as a Favorable Photocatalyst for Tetracycline Degradation
Bahar Jeyhoon, Vahid Safarifard
Abstract
Abstract Metal‐organic frameworks (MOFs) are promising materials for photocatalytic applications due to their unique properties. Core‐shell MOFs have recently emerged as a particularly attractive subclass of MOFs, offering enhanced light absorption, charge separation capabilities, and stability. In this study, we synthesized UiO‐66‐NH 2 @ZIF‐67 and UiO‐66‐NH 2 @ZIF‐8 core‐shell structures using UiO‐66‐NH 2 , ZIF‐67, and ZIF‐8. We found that UiO‐66‐NH 2 @ZIF‐67 exhibited a photocatalytic tetracycline (TC) degradation rate that was five times higher than that of pure UiO‐66‐NH 2 under visible light. Furthermore, UiO‐66‐NH 2 @ZIF‐67 demonstrated superior stability and recyclability, maintaining its efficiency for five cycles. The photocatalytic removal efficiency of TC over UiO‐66‐NH 2 @ZIF‐67 under visible light reached 97 % in just 60 minutes. In this study, the two MOFs with a high surface area, one with a large bandgap and one with the ability to absorb visible light were combined to construct the desire core‐shell structure. Our results offer a novel and convenient strategy for synthesizing highly effective and stable core‐shell MOF‐on‐MOF photocatalysts for photodegradation and TC degradation.