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采用静电纺丝法合成了纤维状的Bi2Fe4O9前驱体, 再对前驱体进行热处理得到了棒状的Bi2Fe4O9.通过X射线衍射、 扫描电子显微镜及透射电子显微镜表征了合成样品的物相及形貌特征. 结果表明合成的样品为Bi2Fe4O9单相,属于正交晶系; 退火处理导致纤维状的前驱体转变为棒状的Bi2Fe4O9. 紫外-可见吸收光谱表明制备的Bi2Fe4O9对光的吸收范围广, 不仅对紫外光具有较强吸收,而且对可见光也有一定的吸收.通过振动样品磁强计测定 Bi2Fe4O9磁滞回线研究其磁学特性,相应的矫顽力Hc 82 Oe (1 Oe = 79.5775 A/m),剥离顺磁信号后的剩磁Mr 0.25 emu/g, 研究发现Bi2Fe4O9样品具有弱铁磁性,并且软磁性能有所提高.The Bi2Fe4O9 fibrous precursor is successfully synthesized through electrospinning technique, and the single-phase claviform Bi2Fe4O9 is obtained after calcining the precursor. The UV-vis absorption spectrum shows that the absorption range of the as-prepared Bi2Fe4O9 is wide, which indicates that the as-prepared Bi2Fe4O9 could be a photocatalyst with visible-light-driven photocatalytic activity. In addition,the result of magnetic hysteresis loop for Bi2Fe4O9 shows weak ferromagnetism and good soft magnetic properties, which indicate that the as-prepared Bi2Fe4O9 has a good application in soft magnetic material.
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Keywords:
- Bi2Fe4O9 /
- electrospinning /
- magnetic properties
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[47] -
[1] Koizumi H, Niizeki N, Ikeda T 1964 J. Appl. Phys. 3 495
[2] [3] Kostiner E, Shoemaker G L 1971 J. Solid State Chem. 3 186
[4] [5] Groult D, Hervieu M, Nguyen N, Raveau B 1988 J. Solid State Chem. 76 248
[6] [7] Poghossian A S, Abovian H V, Avakian P B, Mkrtchian S H, Haroutunian V M 1991 Sens. Actuators B 4 545
[8] Zakharchenko N I 2000 J. Appl. Chem. 73 2047
[9] [10] [11] Zakharchenko N I 2002 Kinet Catal. 43 95
[12] Yang Z, Huang Y, Dong B, Li H L, Shi S Q 2006 J. Solid State Chem. 179 3324
[13] [14] Xiong Y, Wu M, Peng Z, Jang N, Chen Q 2004 Chem. Lett. 33 502
[15] [16] [17] Sun S, Wang W, Zhang L 2009 J. Phys. Chem. C 113 12826
[18] Wang Y, Xu G, Yang L, Ren Z 2009 Ceram. Int. 35 51
[19] [20] [21] Han J T, Huang Y H, Jia R J 2006 J. Cryst. Growth 294 469
[22] [23] Ruan Q J, Zhang W D 2009 J. Phys. Chem. C 113 4168
[24] Formalas A 1934 U.S. Patent 1 975 504[1934]
[25] [26] Li D, Xia Y N 2004 Adv. Mater. 16 1151
[27] [28] [29] Xia Y, Sang P Y, Sun Y, Wu Y, Mayers B, Gates B, Yin Y, Kim F, Yan H 2003 Adv. Mater. 15 353
[30] Law M, Goldberger J, Yang P 2004 Annu. Rev. Mater. Res. 34 83
[31] [32] [33] Kenawy E R, Abdel-Hay F I, El-Newehy M H, Wnek G E 2009 Mater. Chem. Phys. 113 296
[34] [35] Yin Y, Gates B, Xia Y 2000 Adv. Mater. 12 1426
[36] Doh S J, Kim C, Lee S G, Lee S J, Kim H 2008 J. Hazard. Mater. 154 118
[37] [38] [39] Cho C M, Noh J H, Cho I S, An J S, Hong K S, Kim J Y 2008 J. Am. Ceram. Soc. 91 3753
[40] [41] Baji A, Mai Y W, Li Q, Wong S C, Liu Y, Yao Q 2011 Nanotechnology. 22 235702
[42] [43] Xie S, Li J, Proksch R, Liu Y, Zhou Y, Liu Y, Ou Y, Lan L, Qiao Y 2008 Appl. Phys. Lett. 93 222904
[44] Park T J, Papaefthymiou G C, Viescas A J, Moodenbaugh A R, Wong S S 2007 Nano Lett. 7 766
[45] [46] Tian Z M, Yuan S L, Wang X L, Zheng X F, Yin S Y, Wang C H, Liu L 2009 J. Appl. Phys. 106 103912
[47]
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