铁酸镁/氧化锌纳米磁性复合材料的光催化性能  

Photocatalytic Properties of MgFe2O4/ZnO Magnetic Nanocomposite

作　　者：曹建文 田晓霞[2] 蒙澳 赵芸彤 孔志远 张家瑞 马丽斯[2] CAO Jianwen;TIAN Xiaoxia;MENG Ao;ZHAO Yuntong;KONG Zhiyuan;ZHANG Jiarui;MA Lisi(Cadet Brigade 4, School of Aeronautics and Astronautics Engineering, Air Force Engineering University, Xi’an 710051, China;Department of Basic Sciences, Air Force Engineering University, Xi’an 710051, China;Cadet Brigade 2, Air and Missile Defense College, Air Force Engineering University, Xi’an 710051, China)

机构地区：[1]空军工程大学航空航天工程学院学员四大队,西安710051 [2]空军工程大学基础部,西安710051 [3]空军工程大学防空反导学院学员二大队,西安710051

出　　处：《人工晶体学报》2020年第3期462-467,共6页Journal of Synthetic Crystals

基　　金：国家自然科学基金(21471159);陕西省自然科学基金(2019JZ-40);国家级大学生创新创业计划项目(201890052006);空军工程大学基础部课题(YNJC19070601,JK2019115)。

摘　　要：采用原位水热法合成MgFe2O4/ZnO纳米复合材料,通过窄带隙的磁性铁酸镁半导体与宽带隙的氧化锌半导体进行匹配并形成具有异质结的复合光催化剂。借助X射线衍射仪(XRD)分析样品的相结构、扫描电子显微镜观察样品微观形貌、振动样品磁场计(VSM)测试样品磁性能、紫外-可见分光光度计(UV-Vis)表征MgFe2O4/ZnO磁性纳米复合材料光催化性能。结果表明,与MgFe2O4复合之后的MgFe2O4/ZnO磁性纳米复合材料对光的吸收范围拓宽到可见光范围,有效提高了ZnO的光催化性能,在可见光照射60 min后,对甲基橙溶液的降解率可达到95.2%,该催化剂5次循环后的活性仍然大于87.3%。MgFe2O4/ZnO magnetic nanocomposite materials was prepared by hydrothermal method,and the narrow band gap MgFe2O4magnetic semiconductor is matched with the wide band gap ZnO semiconductor to form a composite photocatalyst with heterojunction.The composites were characterized by X-ray diffraction(XRD),Scanning electron microscope(SEM),Vibration sample magnetic field meter(VSM),and UV-visible diffuse reflectance spectroscope(UV-Vis DRS),meaning to analysis its surface structure,morphology,magnetic properties and photocatalytic activity.Results show that the introduction of MgFe2O4 effectively extend the absorption range,thereby enhance the ZnO photodegradation efficiency of pollutant improves the adsorption capacity and photocatalytic activity of composites.The photodegradation efficiencies of MO are approximately 95.2%after 60 min under visible light.After 5 cycles recovery tests,its photocatalytic degradation of methyl orange is still above 87.3%.

关 键 词：磁性 MgFe2O4/ZnO 复合 可见光催化 

分 类 号：O643.3[理学—物理化学]