Hajati Narjes, Farhadian Mehrdad, Solaimany Nazar Ali Reza, Hajiali Mahboube
Department of Chemical Engineering, Faculty of Engineering, University of Isfahan, Isfahan, Iran.
Department of Chemical Engineering, Faculty of Engineering, University of Isfahan, Isfahan, Iran.
J Environ Manage. 2025 Sep;392:126735. doi: 10.1016/j.jenvman.2025.126735. Epub 2025 Aug 2.
ZnBiO/ZIF-67 S-scheme heterojunction (ZBO/ZIF-67) was successfully synthesized through a solvent-induced process at room temperature for the effective degradation of tetracycline hydrochloride (TC-HCl). The catalysts were characterized by XRD, FTIR, XPS, FE-SEM, EDX, TEM, PL, UV-Vis DRS, TGA, EIS, and photocurrent response analyses. Scavenger tests were used to investigate the photocatalytic reaction mechanism under visible light. The photocurrent response was utilized to confirm the enhanced photocatalytic performance in the heterojunction. In antibiotic degradation, the effective use of photocatalytic processes with peroxymonosulfate (PMS) is attributed to the enhanced production of reactive oxygen species (ROS). The ZBO/ZIF-67/PMS system demonstrated greater degradation capacity compared to the ZBO/ZIF-67 system, with a reduce in reaction time, while ZIF-67 exhibited effectiveness in the Co/Co cycle for activating PMS. The optimum operating parameters were obtained by the Central Composite Face-Centered method (CCF) as pH = 5, light intensity = 11.1 mW/cm, the ratio of photocatalyst load to the TC-HCl concentration = 10 mgCat/mgTC-HCl, and irradiation time = 90 min. The ZBO/ZIF-67/PMS system achieved 93.4 % TC-HCl degradation in just 15 min under visible light. After 90 min of photocatalytic reaction, the ZBO/ZIF-67 system achieved a TC-HCl removal efficiency of 90.4 %, while the ZBO/ZIF-67/PMS system reached 99.6 %. The influence of PMS concentration was examined, showing that 0.5 g/L is the optimal value. The leaching of metal ions, stability, and reuse potential of the ZBO/ZIF-67/PMS system were examined, and environmental safety was confirmed by the reduction in TC-HCl toxicity, demonstrated by OD measurements of Escherichia coli (E. coli) and enhanced plant root growth. The results revealed that the catalyst displayed excellent activity over five cycles. This study provides new insights into PMS activation using the ZBO/ZIF-67 heterojunction, potentially expanding strategies for photocatalyst-based PMS activation in degrading antibiotic pollutants in water.
通过室温下的溶剂诱导过程成功合成了ZnBiO/ZIF-67 S型异质结（ZBO/ZIF-67），用于有效降解盐酸四环素（TC-HCl）。通过XRD、FTIR、XPS、FE-SEM、EDX、TEM、PL、UV-Vis DRS、TGA、EIS和光电流响应分析对催化剂进行了表征。采用清除剂试验研究了可见光下的光催化反应机理。利用光电流响应来确认异质结中光催化性能的增强。在抗生素降解中，光催化过程与过一硫酸盐（PMS）的有效结合归因于活性氧（ROS）生成的增加。与ZBO/ZIF-67体系相比，ZBO/ZIF-67/PMS体系表现出更大的降解能力，反应时间缩短，而ZIF-67在Co/Co循环中对激活PMS具有有效性。通过中心复合表面中心法（CCF）获得的最佳操作参数为pH = 5、光强 = 11.1 mW/cm、光催化剂负载量与TC-HCl浓度之比 = 10 mgCat/mgTC-HCl以及照射时间 = 90分钟。ZBO/ZIF-67/PMS体系在可见光下仅15分钟内就实现了93.4%的TC-HCl降解。经过光催化反应90分钟后，ZBO/ZIF-67体系实现了90.4%的TC-HCl去除效率，而ZBO/ZIF-67/PMS体系达到了99.6%。研究了PMS浓度的影响，结果表明0.5 g/L是最佳值。考察了ZBO/ZIF-67/PMS体系中金属离子的浸出、稳定性和重复使用潜力，并通过对大肠杆菌（E. coli）的OD测量以及植物根系生长增强证明的TC-HCl毒性降低来确认环境安全性。结果表明，该催化剂在五个循环中均表现出优异的活性。本研究为利用ZBO/ZIF-67异质结激活PMS提供了新的见解，可能会扩展基于光催化剂的PMS激活策略，用于降解水中的抗生素污染物。
