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Updated: May 6, 2026

A Complete Method for Evaluating the Performance of Photocatalysts for the Degradation of Antibiotics in Environmental Remediation
Published on: October 6, 2022
(COOH, NH2)-modified defective MOF-808(Zr) for enhancing photocatalytic oxidation of tetracycline and structural
An-Yu Wu1, Kazuki Harada2, Yun-Yun Tang1
1Department of Chemical Engineering, Sustainable Electrochemical Energy Development Center (SEED), National Taiwan University of Science and Technology, Daan Dist., Taipei City, 106, Taiwan.
Abstract:
Zirconium-based MOF-808 exhibits limited light absorption, restricting its photocatalytic performance. In this study, a dual-doping strategy involving 4-aminobenzoic acid (PABA) and colloidal dopamine-melanin (Dpa) was employed to synergistically enhance both the adsorption capacity and light absorption of MOF-808 for photocatalytic tetracycline oxidation. The dual-doped PABA/Dpa-MOF-808 (P/D/MOF-808) sample exhibited extended light absorption in the visible light range (350-800 nm) and a significantly larger surface area (∼1150 m2/g) than that of pristine MOF-808 (∼728 m2/g). These improvements resulted in enhanced tetracycline adsorption (174 mg/g) and degradation efficiency (∼95 %). PABA, containing a single carboxylate group, acted as a defective bridge linker by bonding with the Zr sites of MOF-808, thereby improving the surface adsorption of tetracycline. Dpa, with dual hydroxyl groups, formed bonds with the carboxylate groups of MOF-808 via esterification reactions. The exposed ‒NH2 groups with their lone electron pairs, further enhanced light absorption, thus improving photocatalytic activity. Based on Pearson correlation coefficients, the ‒NH2 group was the most influential factor for the degradation efficiency. The dual doping of PABA and Dpa in MOF-808 (NH2-modified defective MOF-808(Zr)) effectively enhances the adsorption and degradation of tetracycline, providing a green and sustainable approach for wastewater treatment.
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