抗生素污染对我国有显著的负面影响,世界上最大的抗生素生产商和消费者之一。在这项研究中,CoFe-LDHs的三维花状结构用于在由过氧单硫酸盐(PMS)触发并暴露于可见光的系统中有效降解四环素(TC)。在探索了不同金属比例的影响后,催化剂用量,初始TC浓度,pH值,确定了最佳反应条件。与纯CoFe-LDHs相比,添加PMS可显著提高TC消除率。强大的抗环境能力,出色的稳定性和可重用性,和普遍的灵活性。猝灭实验和电子自旋共振检测表明,活性双金属组分之间电子的协同传输促进了活性氧的产生。Further,光生空穴是主要的氧化物种,这对TC的降解贡献更大。提出了TC的潜在降解途径和中等毒性。这项工作提供了一种以光生孔为主的新方法,可以有效地去除TC废水。
Antibiotic contamination has a significant negative impact on China, one of the largest producers and consumers of antibiotics worldwide. In this
study, a three-dimensional flower-like structure of CoFe-LDHs was used to efficiently degrade tetracycline (TC) in a system triggered by peroxymonosulfate (PMS) and exposed to visible light. After exploring the effects of different metal ratios, catalyst dosage, initial TC concentrations, and pH, the optimal reaction conditions were determined. In comparison to pure CoFe-LDHs, the TC elimination rate was dramatically increased by the addition of the PMS. The strong environmental resistance, excellent stability and reusability, and universal flexibility were shown. The quenching experiments and electron spin resonance detection showed that the creation of reactive oxygen species was facilitated by the synergistic transmission of electrons between the active bimetallic components. Further, photogenerated holes was the dominant oxidizing species, which contributed more to the degradation of TC. The potential degradation pathways and intermediate toxicity of TC were suggested. This work offers a new method dominated by photogenerated holes for efficiently removing TC effluent.