• 关键词：MoO₂  氧空位  过一硫酸盐  铁离子循环  四环素

• 基金项目：肇庆市科技创新指导类项目（No. 2021040302003，201904030201）； 肇庆学院校级科研基金项目（No. 201902，202012，202021，202022）

• 张博
• 肇庆学院环境与化学工程学院，肇庆 526061;广东省环境健康与资源利用重点实验室，肇庆 526061

• 黎素
• 肇庆学院环境与化学工程学院，肇庆 526061;广东省环境健康与资源利用重点实验室，肇庆 526061

• 张扬
• 肇庆学院环境与化学工程学院，肇庆 526061;广东省环境健康与资源利用重点实验室，肇庆 526061

• 肖纯
• 肇庆学院环境与化学工程学院，肇庆 526061

• 摘要：采用NaBH₄超声还原法合成了富含氧空位的MoO₂，并通过多种表征方法证明了氧空位的存在.10-MoO₂作为助催化剂显著增强了Fe²⁺/过一硫酸盐体系催化性能，构建的10-MoO₂/Fe²⁺/PMS体系可快速降解四环素（TC），10 min内对TC的降解率接近100%.系统研究了各种影响因素对TC降解效果的影响，探讨了助催化剂的稳定性及该体系的实用性.电化学、铁离子循环及自由基捕获实验的结果表明，由于氧空位（O_vacancy）的存在，降低了MoO₂的电阻，增强了电子转移能力，加速了Fe³⁺/Fe²⁺循环，提高了活性氧物种的产率，从而增强了Fe²⁺/PMS类芬顿体系的催化活性.本研究为类芬顿法处理抗生素废水提供了一种新的视角.

• Abstract：Oxygen-vacancy-rich MoO₂ was synthesized by ultrasonic reduction method with NaBH₄， and the existence of oxygen vacancies was demonstrated by various characterization methods. By employing 10-MoO₂ as a cocatalyst， the catalytic effect of the Fe⁺/peroxymonosulfate system promoted significantly， and the tetracycline （TC） could be degraded rapidly by the 10-MoO₂/Fe²⁺/PMS system， close to 100% within 10 min. The effects of various factors on the degradation of TC were systematically studied. The stability of the cocatalyst and the practical feasibility of the system were discussed. The results of electrochemical， iron ions cycle and radical trapping experiments showed that due to the existence of oxygen vacancies （O_vacancy）， the resistance of MoO₂ was reduced and the electron transfer ability was improved， which acceleratinges the cyclic transformation cycle of Fe³⁺/Fe²⁺， so as to promote the generatingon of reactive oxygen species， and thereby enhance the catalytic activity of Fe²⁺/PMS Fenton-like system was enhanced. This study provides a new perspective for the treatment of antibiotic wastewater by Fenton-like method.

• Key words：MoO₂  oxygen vacancy  peroxymonosulfate  iron ions cycle  tetracycline

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