MOFs材料负载的钴铁尖晶石活化过一硫酸盐降解四环素

Efficiently activate peroxymonosulfate by MOFs loaded cobalt ferrite for tetracycline degradation

通过简单的水热法成功制备了钴铁尖晶石和MOFs材料耦合的磁性功能催化剂CoFe_(2)O_(4)/UiO-66-NH2(CF/U6N),用于活化过一硫酸盐降解水中的四环素(TC)。由于负载后CoFe_(2)O_(4)活性组分分散性的提高和与载体之间的相互作用增强,CF/U6N表现出良好的催化活性和稳定性,在30 min内对TC降解效率可达93.2%。5次循环后,对TC的去除率仍保持在80%以上。同时CF/U6N功能催化剂可适用于较宽的pH值范围(3~9),在无机阴离子共存条件下对TC降解也具有较高的催化活性。猝灭实验和电子顺磁光谱表明TC的降解过程涉及自由基和非自由基路径,且硫酸根自由基和单线态氧均在TC降解过程中起到重要作用。

The magnetic function catalyst CoFe_(2)O_(4)/UiO-66-NH2(CF/U6N)of cobalt ferrite and MOFS material coupling is successfully prepared through the simple hydrothermal to activate peroxymonosulfate on tetracycline(TC)degradation.Due to the improved dispersion of the CoFe_(2)O_(4)active component of and the enhanced interaction with the U6N,CF/U6N showed attractive catalytic activity and stability,and could effectively degrade pollutants with high degradation difficulty such as tetracycline hydrochloride(TC)within 30 min with a degradation efficiency of 93.2%.The removal efficiency of TC remained above 80%after 5 consecutive cycles.Meanwhile,the CF/U6N functional catalyst could maintain favorable degradation activity of TC in a wide pH range(3.0~9.0)and also exhibited high catalytic activity for TC degradation under the condition of inorganic anion coexistence.Quenching tests and electron paramagnetic resonance spectrum show that the degradation process of TC involves both free radical and nonfree radical pathways,and both sulfate radicals and singlet oxygen play an important role in TC degradation processes.