磁性LDHs复合材料的制备及可见光光催化性能研究  

Synthesis of LDHs Magnetic Composites and Visible-Light Photocatalytic Activity

作　　者：王卫伟[1] 于欢[1] 姚佳良[1] 张爱娟[1] 

机构地区：[1]山东理工大学材料科学与工程学院,淄博255091

出　　处：《人工晶体学报》2017年第9期1833-1837,共5页Journal of Synthetic Crystals

基　　金：山东省自然科学基金(ZR2015BM022)

摘　　要：材料复合过程组成单元间的相互作用有利于光生电子空穴对的分离,是提高材料光催化活性的一条有效途径。以Mg-Al-LDHs为主,利用直接包覆法在Fe_3O_4表面垂直生长生长LDHs,并引入Cu元素,得到了可见光光催化性能良好的Fe_3O_4/Cu-Mg-Al-LDHs复合材料。利用X-射线衍射、扫描电镜、X射线光电子能谱、红外光谱和交变梯度磁强计等测试方法研究了样品的形貌、粒径、结晶性、磁性能和元素。对比分析了单一材料、单一材料简单混合样品和Fe_3O_4/Cu-Mg-Al-LDHs复合材料对甲基橙光催化降解效果。实验结果表明,Fe_3O_4/Cu-Mg-Al-LDHs复合材料对甲基橙表现出良好的光催化效果,同时良好的磁性能有利于吸附剂的回收。The interaction among units favors the separation of the photogenerated electron/hole pairs,which is an effect method to improve its photocatalytic performance. Layered double hydroxides（ LDHs）sheets grew vertically on the surface of Fe3O4 introducing Cu, which exhibited good visible-light photocalytic property. The morphology,particle size,crystallinity,magnetic property and compositions were characterized by X-ray diffraction,scanning electron microscopic analysis,X-ray photoelectron spectroscopy,infrared spectrum and alternating gradient magnetometer. The photocalytic property of the single materials,the mixture of Fe3O4 and Cu-Mg-Al-LDHs powders,and Fe3O4/Cu-Mg-Al-LDHs were investigated. The experimental results show that Fe3O4/Cu-Mg-Al-LDHs composites exhibited better visible-light photocalytic property in the degradation of methyl orange. In addition,Fe3O4/Cu-Mg-AlLDHs composites can be separated by applying an appropriate magnetic field.

关 键 词：层状双金属氢氧化物(LDHs) 磁性能 复合材料 可见光光催化 

分 类 号：TQ123.4[化学工程—无机化工]