MOF-808/BiOCl复合材料的制备及其光催化性能

将高稳定性的MOF-808与BiOCl结合，采用简便的水热法制备出新型MOF-808/BiOCl复合异质结材料。以环丙沙星(CIP)为污染物，探究复合材料MOF-808/BiOCl对CIP的光催化性能。发现含有10% MOF-808的复合材料(MOF-808/BiOCl-10%)表现出最佳的光催化活性。在紫外光照射20 min内，MOF-808/BiOCl-10%对CIP的光催化降解效率高达94.7%。通过X射线粉末衍射、扫描电镜、红外光谱、荧光光谱、紫外可见漫反射光谱、光电流、电化学阻抗等表征技术来考察材料的物相组成、形貌以及光电化学性质。紫外可见漫反射光谱的结果表明，MOF-808/BiOCl-10%材料光吸收范围得到提高。同时进行了自由基捕获实验。基于以上实验数据，提出了MOF-808/BiOCl复合材料可能的光催化机理。

Preparation and photocatalytic degradation performance of MOF-808/BiOCl composites

A novel MOF-808/BiOCl composite heterojunction material was prepared by combining highly stable MOF-808 with BiOCl by simple hydrothermal method. The photocatalytic performance of composite MOF-808/BiOCl on ciprofloxacin (CIP) was investigated using CIP as a contaminant. Compared with pure BiOCl, the performance of composite materials has been improved. Among them, composites containing 10% MOF-808 (MOF-808/BiOCl-10%) showed the best photocatalytic activity. Within 20 min of UV light irradiation, the photocatalytic degradation efficiency of CIP by MOF-808/BiOCl-10% was as high as 94.7%. X-ray powder diffraction (XRD), scanning electron microscopy (SEM), infrared spectroscopy (FT-IR), fluorescence spectroscopy, ultraviolet-visible diffuse reflection spectroscopy (UV-Vis DRS), photocurrent, electrochemical impedance, and other characterization techniques were performed to analyze the phase composition, morphology and photoelectrochemical properties of materials. The formation of MOF-808 and BiOCl heterojunctions is beneficial to suppress the compounding efficiency of photogenerated carriers and improving photocatalytic activity. The UV-Vis diffuse reflectance spectroscopy results show that the light absorption range of MOF-808/BiOCl-10% material is improved. At the same time, radical trapping experiments were carried out. It indicates that ·O₂^- and h⁺ are the active species that play a major role in the degradation of CIP by MOF-808/BiOCl-10%. Based on the above experimental data, the possible photocatalytic mechanism of MOF-808/BiOCl composites was proposed.