摘要
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。
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 for-mation of MOF-808 and BiOCl heterojunctions is beneficial to suppress the compounding efficiency of photogenerat-ed 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·O_(2)-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.
作者
赵莹鑫
胡豪
周鑫
杨水金
杨赟
ZHAO Ying-Xin;HU Hao;ZHOU Xin;YANG Shui-Jin;YANG Yun(College of Chemistry and Chemical Engineering,Hubei Key Laboratory of Pollutant Analysis&Reuse Technology,Hubei Normal University,Huangshi,Hubei 435002,China;College of Chemistry and Environmental Engineering,Hanjiang Normal University,Shiyan,Hubei 442000,China)
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2023年第8期1553-1563,共11页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金(No.22072038)
湖北省教育厅重点科研项目(No.D20213102)资助。
