李智颖，顾傲天，付 豪，陈九玉，陈凯伟，杨 毅

（南京理工大学 环境与生物工程学院； 江苏省化工污染控制与资源化重点实验室，江苏 南京 210094）

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。

摘要：为了提高材料对亚甲基蓝的光催化性能,通过原位生长对不同锌铝物质的量比的Zn-Al层状双氧化物(LDO)进行修饰,合成ZIF-8@LDO复合材料;采用X射线衍射、扫描电子显微镜等方法对复合材料进行详细的表征。结果表明:相较于未修饰的LDO材料,所制备的复合材料对亚甲基蓝具有较好的吸附性能和光催化降解活性。通过改变ZIF-8@LDO合成过程中锌铝物质的量的比,发现其值为2时,ZIF-8@LDO-2复合材料在150 min内,对亚甲基蓝的去除率超过99.3%;在pH为4～6范围内效果最佳,重复使用4次后,仍能保持86.1%的降解率。

关键词：亚甲基蓝；沸石咪唑酯骨架；层状双氧化物；光催化

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

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