Effect of magnetic carrier NiFe₂O₄ nanoparticles on physicochemical and catalytic properties of magnetically separable photocatalyst TiO₂/NiFe₂O₄

Abstract

A series of magnetically separable photocatalyst TiO₂/NiFe₂O₄(TN) with different mass ratios of NiFe₂O₄ to TiO₂ was prepared by sol-gel method. The X-ray diffraction(XRD), X-ray photoelectron spectroscopy(XPS), transmission electron microscopy(TEM), ultraviolet-visible spectroscopy(UV-Vis), Brunauer-Emmett-Teller(BET) surface analysis and photoluminescence spectroscopy(PL) were used to characterize the photocatalyst TN. The XRD patterns of TN indicate that adulterating a smidgen of NiFe₂O₄ into TiO₂(about 0.1%, mass ratio) can promote the phase transformation of TiO₂, however, when the doped amount of NiFe₂O₄ surpasses 1%, the introduction of NiFe₂O₄ can inhibit the growth of TiO₂ crystal grain and reduce the size of TiO₂ crystal grain. The XPS results of TN indicate that some Fe³⁺ replace Ti⁴⁺ of the TiO₂ lattice forming Fe-O-Ti bonds. The PL analysis of TN shows that the NiFe₂O₄ nanoparticles in photocatalyst TN play the role of the effective recombination centre of the photogenerated electrons and holes, leading to the decrease in photocatalytic activity.

Keywords

Photocatalyst / TiO₂ / NiFe₂O₄ / Magnetical separation

References

[1] Carp O., Huisma C. L., Reller A. Prog. Solid State Chem., 2004, 32(1/2): 33.

[2] Mukherjee P. S., Ray A. K. Chem. Eng. Technol., 1999, 22(3): 253.

[3] Arslan I., Balcioglu I. A., Bahnemann D. W. Appl. Catal. B: Environ., 2000, 26(3): 193.

[4] Chen X. Q., Li F. B., Li X. J., Gu G. B. Soil Environ. Sci., 2001, 10(1): 30.

[5] Peng S. C., Xie J. J., Qing C. S. J. Chin. Ceram. Soc., 2006, 34(10): 1208.

[6] Shimizu K., Murayama H., Nagai A., Shimada A., Hatamachi T., Kodama T., Kitayama Y. Appl. Catal. B: Environ., 2005, 55(2): 141.

[7] Wang L. J., Zhang D. Y. Inorg. Chem. Ind., 2010, 42(6): 15.

[8] Horikoshi S., Watanabe N., Onishi H., Hidaka H., Serpone N. Appl. Catal. B: Environ., 2002, 37(2): 117.

[9] Beydoun D., Amal R., Low G. K. C., McEvoy S. J. Phys. Chem. B, 2000, 104(18): 4387.

[10] Gao Y., Chen B. H., Li H. L., Ma Y. X. Mater. Chem. Phys., 2003, 80(1): 348.

[11] Ortega D., Garitaonandia J. S., Barrera-Solano C., Ramirez-Del-Solar M., Blanco E., Dominguez M. J. Non-Cryst. Solids, 2006, 352(26/27): 2801.

[12] Chen L. Y., Shen Y. M., Bai J. F. Mater. Lett., 2009, 63(12): 1099.

[13] Xu S. H., Shangguan W. F., Yuan J., Chen M. X., Shi J. W. Appl. Catal. B: Environ., 2007, 71(3/4): 177.

[14] Xu S. H., Shangguan W. F., Yuan J., Chen M. X., Shi J. W. Chin. J. Chem. Eng., 2007, 15(2): 190.

[15] Xu S. H., Shangguan W. F., Yuan J., Chen M. X., Shi J. W. Nanotechnology, 2008, 19(9): 095606.

[16] Xu M. W., Bao S. J., Zhang X. G. Mater. Lett., 2005, 59(17): 2194.

[17] Kurinobu S., Tsurusaki K., Natui Y., Kimata M., Hasegawa M. Magn. J. Magn. Mater., 2007, 310(2): e1025.

[18] Chen F., Xie Y. D., Zhao J. C., Lu G. X. Chemosphere, 2001, 44(5): 1159.

[19] Nobile A., Davis M. W. J. Catal., 1989, 116(2): 383.

[20] Pal B., Sharon M., Nogami G. Mater. Chem. Phys., 1999, 59(3): 254.

[21] Yuan Z. H., Zhang L. D. Chem. J. Chinese Universities, 1999, 20(7): 1007.

[22] Li J. X., Xu J. H., Dai W. L., Li H. X., Fan K. N. Appl. Catal. B: Environ., 2009, 85(3/4): 162.

[23] Zhu J. F., Chen F., Zhang J. L., Chen H. J., Anpo M. J. Photochem. Photobiol. A: Chem., 2006, 180(1/2): 196.

[24] Yuan W., Dai X. M., Ai D. S., Li Q. F. J. Chin. Ceram. Soc., 2002, 30(S1): 31.

[25] Balaji S., Selvan R. K., Berchmans L. J., Angappan S., Subramanian K., Augustin C. O. Mater. Sci. Eng. B: Solid State Mater. Adv. Technol., 2005, 119(2): 119.

[26] Beydoun D., Amal R., Scott J., Low G. K. C., McEvoy S. Chem. Eng. Technol., 2001, 24(7): 745.

[27] Xu S. H., Shangguan W. F., Yuan J., Shi J. W., Chen M. X. Mater. Sci. Eng. B: Solid State Mater. Adv. Technol., 2007, 137(1–3): 108.