BaTiO3/Co3O4异质结的构建及其压电协同活化过一硫酸盐降解四环素
The construction of the BaTiO3/Co3O4 heterojunction and its piezoelectric-assisted activation of peroxymonosulfate for the degradation of tetracycline
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摘要: 过一硫酸盐(PMS)高级氧化技术虽氧化能力强、反应速度快,但活化效率低的问题限制了其应用。本文采用模板法制备BaTiO3/Co3O4复合压电催化剂,并以盐酸四环素(TC-HCl)为目标污染物,评估其在超声振动下活化PMS的性能。研究表明,Co3O4纳米片负载于棒状BaTiO3表面形成了结合紧密、界面清晰的异质结结构。此外,BT/Co3O4-3表现出最佳的协同催化效果,20 min内对TC-HCl的降解效率达99.48%,较纯BaTiO3提升约3.6倍。同时,连续5次循环后活性保持率仍超过90%,展现出良好的结构稳定性与循环使用性能。上述结果证实了该材料在压电活化PMS体系中的高效稳定性,为压电协同高级氧化处理难降解抗生素提供了可行策略。Abstract: Although peroxymonosulfate (PMS)-based advanced oxidation technology exhibits strong oxidation capacity and fast reaction kinetics, its low activation efficiency limits its practical application. Herein, BaTiO3/Co3O4 composite piezoelectric catalysts were prepared via a template method, and tetracycline hydrochloride (TC-HCl) was used as a model pollutant to evaluate the catalytic performance of PMS activation under ultrasonic vibration. The results show that Co3O4 nanosheets are uniformly loaded onto the surface of rod-like BaTiO3, forming a tightly coupled and well-defined heterojunction structure. Among the composites, BT/Co3O4-3 exhibits the best synergistic catalytic effect, achieving a TC-HCl degradation efficiency of 99.48% within 20 min, which is approximately 3.6 times higher than that of pure BaTiO3. Moreover, the catalyst retains over 90% of its initial activity after five consecutive cycles, demonstrating excellent structural stability and recyclability. These findings confirm the high stability of this material in the piezoelectric-activated PMS system, providing a feasible strategy for the piezoelectric-assisted advanced oxidation treatment of refractory antibiotics.
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