Fabrication of MgFe2O4–ZnO heterojunction photocatalysts for application of organic pollutants
Fabrication of MgFe2O4–ZnO heterojunction photocatalysts for application of organic pollutants
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DOI：
10.1016/j.matlet.2013.12.106
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发表时间：
2014-05
影响因子：
3
通讯作者：
N. Su;Pin Lv;Meijing Li;Xiaolin Zhang;Minghui Li;J. Niu
中科院分区：
文献类型：
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作者：
N. Su;Pin Lv;Meijing Li;Xiaolin Zhang;Minghui Li;J. Niu
采用新型异质结MgFe 2 O 4-ZnO光催化剂对有机污染物罗丹明B（RhB）进行光催化降解。该异质结通过两个步骤制备。首先，采用简单的溶液法在低温下合成了ZnO花状纳米管束。其次，采用化学共沉淀法在ZnO表面包覆MgFe_2 O_4。采用X射线衍射仪（XRD）、UV-3150双光束分光光度计、场发射扫描电镜（FE-SEM）、透射电镜（TEM）和高分辨透射电镜（HRTEM）对样品进行了表征。光催化降解实验结果表明，所制备的异质结MgFe 2 O 4-ZnO具有比纯ZnO和MgFe 2 O 4更高的光催化活性。外加磁场可以方便地分离MgFe_2 O_4-ZnO。MgFe 2 O 4-ZnO复合材料的光催化活性增强的原因可能是由于MgFe 2 O 4和ZnO纳米颗粒之间的异质结相互连接。
Novel heterojunction MgFe2O4–ZnO was employed as a photocatalyst to photodegrade organic pollutants Rhodamine B (RhB). This heterojunction was prepared by two steps. First, ZnO flower-like nanotube bundles were synthesized by using a simple solution method at low temperature. Second, MgFe2O4was coated on ZnO surfaces on the basis of a chemical co-precipitation method. The as-prepared samples were characterized with X-ray diffraction (XRD), UV-3150 double-beam spectrophotometer, field-emission scanning electron microscope (FE-SEM), transmission electron microscopy (TEM), and high-resolution transmission (HRTEM). Photodegradation experiments results indicated that the obtained heterojunction MgFe2O4–ZnO exhibited higher photocatalytic activity than that of pure ZnO or MgFe2O4. Furthermore, MgFe2O4–ZnO could be separated conveniently by using an external magnetic field. The enhanced photocatalytic ability of MgFe2O4–ZnO composites could be attributed to the interconnected heterojunction of MgFe2O4and ZnO nanoparticles.