LI Zhiying，GU Aotian，FU Hao，CHEN Jiuyu，CHEN Kaiwei，YANG Yi

(School of Environment and Biological Engineering; Key Laboratory of Jiangsu Province for Chemical Pollution Control and Resource Reuse, Nanjing University of Science and Technology, Nanjing 210094, China)

Abstract: In order to improve the photocatalytic performance of methylene blue, Zn-Al layered double oxides (LDO) with different molar ratio of zinc to aluminum were modified by in-situ growth, and ZIF-8@LDO composites were synthesized. The composites were characterized in detail by means of X-ray diffraction and scanning electron microscope. The results show that compared with the unmodified LDO materials, the prepared composites have better adsorption properties and photocatalytic degradation activity for methylene blue. By changing the ratio of zinc to aluminum in the process of ZIF-8@LDO synthesis, it is found that when the mass ratio of zinc to aluminum is 2, the removal rate of methylene blue of ZIF-8@LDO-2 composite in 150 min is more than 99.3%. The effect is the best in the range of 4 to 6, and the degradation rate of 86.1% can be maintained after being reused for 4 times.

Keywords: methylene blue; zeolitic imidazolate framework; layered double oxide; photocatalysis

中图分类号： X522

文献标志码：A

文章编号：1008-5548(2021)06-0011-08

DOI:10.13732/j.issn.1008-5548.2021.06.002

收稿日期： 2021-08-21，修回日期：2021-09-17，在线出版时间：2021-10-18 14:27。

基金项目：国家自然科学基金项目，编号：11805101；中央高校基本科研业务费专项资金资助项目，编号：30921013110；江苏省环保科研

课题项目，编号：JSZCD 2018-012；江苏省凹土资源利用重点实验室开放课题项目，编号：HPK202001。

第一作者简介：李智颖(1998—)，女，硕士研究生，研究方向为环境功能材料。E-mail： 1192300153@qq.com。

通信作者简介：杨毅(1973—)，男，博士，研究员，博士生导师，研究方向为环境功能材料。E-mail： yangyi@njust.edu.cn。