用钛铁矿制备Fe_3O_4/TiO_2复合物及其光催化降解性能考察
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摘要
以廉价易得的钛铁矿为原料,采用溶液法制备Fe_3O_4/TiO_2磁性复合物,通过XRD、FT-IR、UV-vis等手段对材料形态结构进行表征分析,产物由面心立方结构的Fe_3O_4和锐钛矿型TiO_2构成,并以光降解有机污染物罗丹明B为探针反应,考察其光催化性能,结果表明,该复合物对罗丹明B具有较好的光催化降解效果,且该复合物在外磁场作用下可回收及再利用,循环5次以上,降解效果仍能达90%以上。
In this paper,we successfully synthesized the magnetic Fe_3O_4/TiO_2 composites by the method of solution preparation.The samples were characterized by XRD,FT-IR,UV-Vis.The photocatalytic activities of prepared samples were evaluated by photodegradation of rhodamine B.The cycling stability of Fe_3O_4/TiO_2 composites were also studied.The results showed that the composite had a good catalytic degradation effect on rhodamine B and outstanding recyclability.The degradation effect of catalyst after reused 5 times was still over 90%.
In this paper,we successfully synthesized the magnetic Fe_3O_4/TiO_2 composites by the method of solution preparation.The samples were characterized by XRD,FT-IR,UV-Vis.The photocatalytic activities of prepared samples were evaluated by photodegradation of rhodamine B.The cycling stability of Fe_3O_4/TiO_2 composites were also studied.The results showed that the composite had a good catalytic degradation effect on rhodamine B and outstanding recyclability.The degradation effect of catalyst after reused 5 times was still over 90%.
引文
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[2]吴江,王松,蒋德山,等.纳米TiO2光催化剂改性方法研究进展[J].当代化工,2016,45(8):345-347.
[3]郭小华.Fe3O4@TiO2光催化剂的制备及其性能研究[J].化学研究与应用,2015,27(10):1559-1563.
[4]Shang J W,Zhang Y X,Xin S C,et al.Highly efficient and recyclable triple-shelled Ag@Fe3O4@SiO2@TiO2photocatalysts for degradation of organic pollutants and reduction of hexavalent chromium ions[J].Nanoscale,2014,6(10):5181-5192
[5]Watson S,Beydoun D,Alllal R.Synthesis of a novel magnetic photocatalyst by direct deposition of nanosized TiO2crystals onto a magnetic core[J].J Phys Chem C,2009,113(2):553-558.
[6]Fan R,Chen X H,Gui Z,et al.Anew simple hydrothermal preparation of nanocrystalline magnetite Fe3O4[J].Mater Res Bul,2001,36(3-4):497-502.
[7]梁翠芬,熊予莹,等.磁性纳米Fe3O4/TiO2复合材料的制备[J].华南师范大学学报,2010,5(2):63-66.
[8]辛铁军,张和鹏,马明亮,等.Fe3O4/TiO2核壳磁性纳米材料的制备和表征[J].功能材料,2014,1(45):1072-1077.
[9]Hasanpour A,Niyaifar M,Mohammadpour H,et al.Anovel non-thermal process of TiO2-shell coating on Fe3O4-core nanoparticles[J].J Phys Chem Solid,2012,73(9):1006-1070.