ZIF-67衍生Co3O4/g-C3N4复合材料光催化降解盐酸四环素废水的研究
Photocatalytic degradation of tetracycline hydrochloride-containing wastewater by ZIF-67 derived Co3O4/g-C3N4 composites
梁月明 1董海山 1王栋 1刘航1
作者信息
- 1. 西南交通大学地球科学与环境工程学院,四川 成都 610000
- 折叠
摘要
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·O2-、h+、.OH 3种自由基,其中·O2-在Co3O4/g-C3N4光催化降解TC-HCl中发挥主要作用.
Abstract
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·O2-,h+and·OH are produced,among them·O2-plays a major role in the photocatalytic degradation of tetracycline hydrochloride by Co3O4/g-C3N4.
关键词
光催化/盐酸四环素/Co3O4/MOFsKey words
photocatalysis/tetracycline hydrochloride/Co3O4/MOFs引用本文复制引用
出版年
2024
NETL
NSTL
万方数据