This study investigates the photocatalytic degradation of antibiotics and the energy storage application of a Gd-doped Zinc-MOF composite. The Gd@Zinc-MOF material, synthesized in a one-step process, exhibits semiconducting properties with a band gap of 3.15 eV, enabling efficient photodegradation of antibiotics under UV light. The material was tested under optimal conditions (pH 7, antibiotic concentration 30 mg/L, catalyst dosage 20 mg/L, 120 min) and achieved 92.15% degradation of NFT. Radical trapping experiments confirmed the role of O₂·⁻ in the process. The material also showed excellent stability upon repeated use. Additionally, the supercapacitive activity of Gd@Zinc-MOF was studied, with a specific capacitance of 1156.25 F g⁻¹ at 1 A g⁻¹ and 93.07% retention after 4000 cycles. The study highlights the potential of Gd-doped Zinc-MOF composites as effective photocatalysts for water purification and promising electrode materials for energy storage. The research is novel as it is the first to investigate the fabrication and application of Gd-doped MOFs in photocatalytic degradation of antibiotics and their energy storage capabilities. The study tested nine antibiotics, including NFT, NFZ, MDZ, NFX, AMX, ODZ, CMP, Naproxen, and Indomethacin, for photocatalytic degradation. Electrochemical tests, including cyclic voltammetry and galvanostatic charge-discharge analyses, were conducted to evaluate the material's performance as an electrode. The results demonstrate the material's potential for both environmental and energy applications.This study investigates the photocatalytic degradation of antibiotics and the energy storage application of a Gd-doped Zinc-MOF composite. The Gd@Zinc-MOF material, synthesized in a one-step process, exhibits semiconducting properties with a band gap of 3.15 eV, enabling efficient photodegradation of antibiotics under UV light. The material was tested under optimal conditions (pH 7, antibiotic concentration 30 mg/L, catalyst dosage 20 mg/L, 120 min) and achieved 92.15% degradation of NFT. Radical trapping experiments confirmed the role of O₂·⁻ in the process. The material also showed excellent stability upon repeated use. Additionally, the supercapacitive activity of Gd@Zinc-MOF was studied, with a specific capacitance of 1156.25 F g⁻¹ at 1 A g⁻¹ and 93.07% retention after 4000 cycles. The study highlights the potential of Gd-doped Zinc-MOF composites as effective photocatalysts for water purification and promising electrode materials for energy storage. The research is novel as it is the first to investigate the fabrication and application of Gd-doped MOFs in photocatalytic degradation of antibiotics and their energy storage capabilities. The study tested nine antibiotics, including NFT, NFZ, MDZ, NFX, AMX, ODZ, CMP, Naproxen, and Indomethacin, for photocatalytic degradation. Electrochemical tests, including cyclic voltammetry and galvanostatic charge-discharge analyses, were conducted to evaluate the material's performance as an electrode. The results demonstrate the material's potential for both environmental and energy applications.