将ZIF-67与g-C₃N₄按一定质量比复合制备Co₃O₄/g-C₃N₄复合光催化材料,并以此来提高Co₃O₄的光催化性能。利用XRD、SEM和FT-IR对复合材料结构、性能和元素分布进行表征。结果表明,当盐酸四环素(TC-HCl)质量浓度为 3 mg/L、质量分数为3%的Co₃O₄/g-C₃N₄投加量为15 mg且pH为中性时,催化剂光催化性能最佳,90 min降解盐酸四环素效率达到了91.1%。3% Co₃O₄/g-C₃N₄复合光催化剂重复使用5次后,其降解率仍可达到88.5%,表明该材料具有一定的光催化稳定性和重复利用性。体系自由基捕获实验证明,产生了·O^-₂、h⁺、·OH 3种自由基,其中·O^-₂在Co₃O₄/g-C₃N₄光催化降解TC-HCl中发挥主要作用。

To improve the photocatalytic performance of Co₃O₄,a Co₃O₄/g-C₃N₄ composite photocatalytic material is prepared from ZIF-67 and g-C₃N₄ through calcining ZIF-67 with MOF template.The structure,properties and elements distribution of the prepared samples are characterized by means of XRD,SEM and FT-IR.The results show that the catalyst exhibits the best photocatalytic performance with a degradation efficiency of 91.1% in 90 min when the concentration of tetracycline hydrochloride is 3 mg·L^-1,the dosage of Co₃O₄/g-C₃N₄ with a mass ratio of 3% is 15 mg and pH is neutral.The degradation rate can still reach 88.5% after the 3% Co₃O₄/g-C₃N₄ composite photocatalyst has been reused for 5 times,indicating a certain photocatalytic stability and reusability.It is verified through system radical capture experiments that three kinds of free radicals including ·O^2-,h⁺ and ·OH are produced,among them ·O^2- plays a major role in the photocatalytic degradation of tetracycline hydrochloride by Co₃O₄/g-C₃N₄.

梁月明(1998-),女,硕士生,研究方向为水污染控制工程,2970501848@qq.com;董海山(1975-),男,博士,副教授,研究方向为水污染控制工程,通讯联系人,1305080092@qq.com。