MIL-53(Fe)金属有机骨架的改性及降解四环素性能研究

Modification of MIL-53(Fe) Metal-Organic Backbone and Degradation of Tetracycline

论文通过溶剂热法制备MoS_(2)@MIL-53(Fe)(记为MSMF)金属有机骨架光催化剂,以四环素为目标污染物,研究催化剂不同配比、反应模式、pH和投加量等因素对四环素降解性能的影响,并使用XRD、XPS、SEM、BET、PL表征分析材料性貌。实验结果显示,MoS_(2)∶MIL-53(Fe)最佳质量比为1∶5(20%MSMF)。在吸附与光催化协同作用下,20%MSMF在400 W紫外光照射50 min四环素去除率为88.57%,而在相同条件下MoS_(2)和MIL-53(Fe)的去除率仅为41.29%、72.21%。表征结果显示:20%MSMF比表面积是MIL-53(Fe)和MoS_(2)的1.11和1.92倍;孔容体积是MIL-53(Fe)和MoS_(2)的3.13、1.56倍;相比MIL-53(Fe)和MoS_(2),20%MSMF电子-空穴对分离效率更高。MoS_(2)的掺杂增强了MIL-53(Fe)的吸附和光催化能力,使其能通过吸附光催化协同反应高效去除四环素。

MoS_(2)@MIL-53(Fe)(denoted as MSMF)metal-organic backbone photocatalyst was prepared by the solvent thermal method to study the effects of different catalyst ratios,reaction modes,pH and dosing amounts on the degradation performance of tetracycline with tetracycline as the target pollutant,and the material properties were analyzed using XRD,XPS,SEM,BET,and PL characterizations.The experimental results showed that the optimal mass ratio of MoS_(2)∶MIL-53(Fe)was1∶5(20%MSMF).The removal rate of tetracycline by 20%MSMF under the synergistic effect of adsorption and photocatalysis was 88.57%at 50 min of 400 W UV irradiation,while the removal rates of MoS_(2)and MIL-53(Fe)were only 41.29%and 72.21%under the same conditions.The characterization results showed that the specific surface area of 20%MSMF was1.11 and 1.92 times higher than that of MIL-53(Fe)and MoS_(2),and the pore volume was 3.13 and 1.56 times higher than that of MIL-53(Fe)and MoS_(2),with the highest electron-hole pair separation efficiency.The doping of MoS_(2)enhanced the adsorption and photocatalytic ability of MIL-53(Fe),enabling efficient removal of tetracycline by synergistic adsorptionphotocatalytic reaction.