由Zn-MOF制备ZnO^(*)及可见光催化降解四环素

Preparation and Photocatalytic Degradation for Tetracycline of ZnO^(*)from Zn-MOF by Visible Light

利用1,3,5-三(3-羧基-三氮唑-亚甲基)-2,4,6-三甲苯(H3L)为配体通过溶剂热法合成了一种含锌基金属有机框架材料(Zn-MOF),并通过高温煅烧方法制备了ZnO^(*)(*代表ZnO有氧空位)。分别利用X-射线粉末衍射(XRD)、扫描电子显微镜(SEM)、电子顺磁共振波谱(EPR)、紫外-可见漫反射光谱测试分析方法对Zn-MOF及ZnO^(*)的结构、形貌及粒径大小、氧空位和带隙宽度(Eg)进行了表征。进一步地,选择四环素(TC)为目标污染物,利用Zn-MOF及ZnO^(*)为催化剂开展可见光催化降解实验。实验结果表明,在可见光驱动下,ZnO^(*)对四环素的光催化降解效果较Zn-MOF得到了很大程度的提升。

A Zn-based metal-organic framework material(Zn-MOF)was synthesized by solvothermal method using 1,3,5-tri(3-carboxyl-triazole-methylene)-2,4,6-tritoluene(H 3L)as ligand,and ZnO^(*)(*represents ZnO containing oxygen vacancies)was prepared by high-temperature calcination.The structure,morphology,particle size,oxygen vacancy and band gap width(E g)of Zn-MOF and ZnO^(*)were characterized by X-ray powder diffraction(XRD),scanning electron microscopy(SEM),electron paramagnetic resonance spectroscopy(EPR)and UV-vis diffuse reflection spectroscopy,respectively.Further,tetracycline(TC)was selected as the target pollutant,and photocatalytic degradation experiments were carried out using Zn-MOF and ZnO^(*)as catalysts.Driven by visible light,the photocatalytic degradation for TC by ZnO^(*)is much better than that by Zn-MOF.