合成并修饰了一种新型的花状CuNiMn-LDH,为了获得有前途的类Fenton催化剂,Fe3O4@ZIF-67/CuNiMn-LDH,利用H2O2氧化剂显著降解刚果红(CR)。通过FTIR分析了Fe3O4@ZIF-67/CuNiMn-LDH的结构和形态特征,XRD,XPS,SEM-EDX,和SEM光谱。此外,磁性和表面电荷通过VSM和ZP分析定义,分别。进行了类似Fenton的实验,以研究CR的类似Fenton的降解条件;pH介质,催化剂用量,H2O2浓度,温度,和CR的初始浓度。催化剂在pH5和25°C下30分钟内表现出最高的CR降解性能,达到90.9%。此外,Fe3O4@ZIF-67/CuNiMn-LDH/H2O2体系在测试不同染料时表现出相当大的活性,因为CV的降解效率,MG,MB,MR,MO,CR分别为65.86、70.76、72.56、75.54、85.99和90.9%,分别。此外,动力学研究表明,Fe3O4@ZIF-67/CuNiMn-LDH/H2O2体系对CR的降解符合拟一级动力学模型。更重要的是,具体结果推导出催化剂组分之间的协同作用,产生由五种活性金属物种组成的连续氧化还原循环。最终,猝灭测试和机理研究表明,Fe3O4@ZIF-67/CuNiMn-LDH/H2O2体系对CR的Fenton类降解的自由基机理途径占优势。
A novel flower-like CuNiMn-LDH was synthesized and modified, to obtain a promising Fenton-like catalyst, Fe3O4@ZIF-67/CuNiMn-LDH, with a remarkable degradation of Congo red (CR) utilizing H2O2 oxidant. The structural and morphological characteristics of Fe3O4@ZIF-67/CuNiMn-LDH were analyzed via FTIR, XRD, XPS, SEM-EDX, and SEM spectroscopy. In addition, the magnetic property and the surface\'s charge were defined via VSM and ZP analysis, respectively. Fenton-like experiments were implemented to investigate the aptness conditions for the Fenton-like degradation of CR; pH medium, catalyst dosage, H2O2 concentration, temperature, and the initial concentration of CR. The catalyst exhibited supreme degradation performance for CR to reach 90.9% within 30 min at pH 5 and 25 °C. Moreover, the Fe3O4@ZIF-67/CuNiMn-LDH/H2O2 system revealed considerable activity when tested for different dyes since the degradation efficiencies of CV, MG, MB, MR, MO, and CR were 65.86, 70.76, 72.56, 75.54, 85.99, and 90.9%, respectively. Furthermore, the kinetic study elucidated that the CR degradation by the Fe3O4@ZIF-67/CuNiMn-LDH/H2O2 system obeyed pseudo-first-order kinetic model. More importantly, the concrete results deduced the synergistic effect between the catalyst components, producing a continuous redox cycle consisting of five active metal species. Eventually, the quenching test and the mechanism study proposed the predominance of the radical mechanism pathway on the Fenton-like degradation of CR by the Fe3O4@ZIF-67/CuNiMn-LDH/H2O2 system.