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. 2024 Nov 4;14(47):35090-35096.
doi: 10.1039/d4ra06460g. eCollection 2024 Oct 29.

Effective BPA degradation in water: the integration of bimetallic UiO-66 Ce-Zr

Leidy Marcela Gallo  1 , Juan L Obeso  1   2 , Nora S Portillo-Vélez  3 , Carlos E Garduño-Albino  3 , Catalina V Flores  1 , Leonardo Herrera-Zuñiga  3 , Alejandro Islas-Jácome  3 , Ricardo A Peralta  3 , Carolina Leyva  1
Affiliations

Effective BPA degradation in water: the integration of bimetallic UiO-66 Ce-Zr

Leidy Marcela Gallo et al. RSC Adv. .

Abstract

In this work, a bimetallic MOF UiO-66 Ce-Zr to degrade bisphenol A (BPA) in water was synthesised. The material exhibited a remarkable degradation efficiency of 84.3% under UV irradiation for 240 minutes. Combining cerium (Ce) and zirconium (Zr) in the MOF structure enhanced the catalytic activity and reinforced its structural stability. Comprehensive characterisation was performed using PXRD, FT-IR, SEM-EDS, XPS, and N₂ adsorption-desorption isotherms. Scavenger tests confirmed that hydroxyl (˙OH) and superoxide (˙O₂⁻) radicals played a crucial role in the photocatalysis. The material demonstrated excellent reusability, maintaining high performance over three cycles with minimal structural changes. Furthermore, a toxicological evaluation of the degradation by-products was conducted using UPLC-MS, reaffirming the potential of the material as an efficient water treatment system. This study underscores the potential of UiO-66 Ce-Zr as a stable and effective photocatalyst for water treatment applications, particularly in removing emerging pollutants such as BPA.

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Conflict of interest statement

There are no conflicts to declare.

Figures

Fig. 1
Fig. 1. (a and b) Photodegradation efficiency of the MOFs UiO-66 in kinetic studies without and with a lamp. (c) PXRD patterns of the initial MOF UiO-66 Ce–Zr and degraded MOF UiO-66 Ce–Zr. (d) Recyclability of the MOF UiO-66 Ce–Zr for three cycles.
Fig. 2
Fig. 2. (a) Scavenger test of the MOF UiO-66 Ce–Zr. (b) Photodegradation efficiency of the MOFs UiO-66 Ce–Zr in kinetic studies without and with a lamp using the scavenger test.
Fig. 3
Fig. 3. High-resolution XPS spectra before and after BPA photodegradation of (a) C 1 s, (b) O 1 s, (c) Zr 3d, and (d) Ce 3d.
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