Shahabinejad Hanieh, Binazadeh Mojtaba, Esmaeilzadeh Feridun, Hashemi Faezeh, Mousavi Seyyed Mojtaba
Department of Chemical Engineering, School of Chemical and Petroleum Engineering, Shiraz University, Shiraz, 7134851154, Iran.
Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan.
Sci Rep. 2024 Jul 23;14(1):16887. doi: 10.1038/s41598-024-67676-5.
Wastewater treatment is inevitably required to alleviate the pollution of water resources by various contaminants such as antibiotics. MOFs are novel materials with photocatalytic activities. In this study, sonophotocatalytic degradation of tetracycline (TC) by the Cerium-based MOF (Ce-MOF) is optimized by modification of its synthesis route. Ce-MOF synthesis by room temperature (RT), hydrothermal (HT), and sonochemical synthesis (SC) are studied. TC degradation experiments revealed the superiority of SC synthesis. The interplay of main synthesis parameters, namely, initial ligand concentration, ultrasound (US) power and time on sonophotocatalytic activity of Ce-MOF, were investigated by response surface methodology model (RSM) utilizing the central composite experimental design (CCD). The optimum SC synthesis conditions are an initial ligand concentration of 8.4 mmol/L, a sonication power of 50 amplitude, and a US time of 60 min. The optimally synthesized Ce-MOF was characterized by infrared spectroscopy, FTIR, XRD, FE-SEM, TEM, zeta potential analysis, diffuse reflectance spectroscopy, particle size analysis, Mott-Schottky analysis, photocurrent analysis, electrochemical impedance spectra, and photoluminescence spectroscopy. The findings indicate that the removal efficiency of TC can reach up to 81.75% within 120 min in an aqueous solution containing an initial TC concentration of 120 ppm and 1 g/L Ce-MOF at pH of 7. Mineralization efficiency of the process is 71% according to COD measurements. The Ce-MOF catalyst retained its chemical stability and remained active upon TC degradation which makes it a promising candidate for wastewater treatment.
为减轻抗生素等各种污染物对水资源的污染，废水处理成为必然需求。金属有机框架材料（MOFs）是具有光催化活性的新型材料。在本研究中，通过改进合成路线优化了铈基金属有机框架材料（Ce-MOF）对四环素（TC）的声光催化降解性能。研究了室温（RT）、水热（HT）和超声化学合成（SC）法制备Ce-MOF的过程。TC降解实验显示了SC合成法的优势。利用中心复合实验设计（CCD）的响应面方法模型（RSM）研究了主要合成参数，即初始配体浓度、超声（US）功率和时间对Ce-MOF声光催化活性的相互作用。最佳的SC合成条件为初始配体浓度8.4 mmol/L、超声功率50振幅和超声时间60分钟。通过红外光谱（FTIR）、X射线衍射（XRD）、场发射扫描电子显微镜（FE-SEM）、透射电子显微镜（TEM）、zeta电位分析、漫反射光谱、粒度分析、莫特-肖特基分析、光电流分析、电化学阻抗谱和光致发光光谱对优化合成的Ce-MOF进行了表征。研究结果表明，在初始TC浓度为120 ppm、Ce-MOF为1 g/L、pH为7的水溶液中，120分钟内TC的去除效率可达81.75%。根据化学需氧量（COD）测量，该过程的矿化效率为71%。Ce-MOF催化剂在TC降解过程中保持了化学稳定性并保持活性，这使其成为废水处理的有前景的候选材料。
