Influences of Silver-Doping on the Crystal Structure, Morphology and Photocatalytic Activity of TiO2 Nanofibers


Doping of titanium dioxide nanofibers by silver nanoparticles revealed distinct improvement in the photocatalytic activity; however other influences have not been investigated. In this work, effect of sliver-doping on the crystal structure, the nanofibrous morphology as well as the photocatalytic activity of titanium oxide nanofibers has been studied. Silver-doped TiO2 nanofibers having different silver contents were prepared by calcination of electrospun nanofiber mats consisting of silver nitrate, titanium isopropoxide and poly(vinyl acetate) at 600℃. The results affirmed formation of silver-doped TiO2 nanofibers composed of anatase and rutile when the silver nitrate content in the original electrospun solution was more than 3 wt%. The rutile phase content was directly proportional with the AgNO3 concentration in the electrospun solution. Negative impact of the silver-doping on the nanofibrous morphology was observed as increase the silver content caused to decrease the aspect ratio, i.e. producing nanorods rather nanofibers. However, silver-doping leads to modify the surface roughness. Study of the photocatalytic degradation of methylene blue dye clarified that increase the silver content strongly enhances the dye oxidation process.

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N. Barakat, M. Kanjwal, S. Al-Deyab and I. Chronakis, "Influences of Silver-Doping on the Crystal Structure, Morphology and Photocatalytic Activity of TiO2 Nanofibers," Materials Sciences and Applications, Vol. 2 No. 9, 2011, pp. 1188-1193. doi: 10.4236/msa.2011.29160.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] X. Chen and S. D. Mao, “Titanium Dioxide Nanomaterials: Synthesis, Properties, Modifications, and Applications,” Chemical Review, Vol. 107, No. 7, 2007, pp. 2891- 2959. doi:10.1021/cr0500535
[2] M. Gr?tzel, “Photoelectrochemical Cells,” Nature, Vol. 414, 2001, pp. 338-344.
[3] A. Millis and S. Le Hunte, “An Review of Semiconductor Photocatalysis,” Journal of Photochemistry and Photobiology, Vol. 108, No. 1, 1997, pp. 1-35.
[4] S. Xu, J. Ng, X. Zhang, H. Bai and D. D. Sun, “Adsorption and Photocatalytic Degradation of Acid Orange 7 over Hydrother-mally Synthesized Mesoporous TiO2 Nanotube,” Colloids and Surfaces A, Vol. 379, No. 1, 2011, pp. 169-175.
[5] C. K. Lee, C. C. Wang, L. C. Juang, M. D. Lyu, S. H. Hung and S. S. Liu, “Effects of Sodium Content on the Microstructures and Basic Dye Cation Exchange of Titanate Nanotubes,” Col-loids and Surfaces A, Vol. 317, No. 1, 2008, pp. 164-173.
[6] M. Fraune, U. Rüdiger and G. Güntherodt, “Size Dependence of the Exchange Bias Field in Ni/NiO Nanostructures,” Applied Physics Letters, Vol. 77, 2000, pp. 3815-3817. doi:10.1063/1.1330752
[7] N. A. M. Barakat, B. Kim, S. J. Park, Y. Jo, M. H. Jung and H. Y. Kim, “Cobalt Nanofibers Encapsulated in Graphite Shell with Thermally Independent Magnetic Properties,” Journal of Materials Chemistry, Vol. 19, No. 39, 2009, pp. 7371-7378. doi:10.1039/b904669k
[8] N. A. M. Barakat, K. A. Khalil, I. H. Mahmoud, M. A. Kanjwal, F. A. Sheikh and H. Y. Kim, “CoNi Bimetallic Nanofibers by Electrospinning: Nickel-Based Soft Magnetic Material with Improved Magnetic Properties,” Journal of Physical Chemistry C, Vol. 114, No. 37, 2010, pp. 15589-15593.
[9] D. Li and Y. Xia, “Fabrication of Tatania Nanofibers by Elec-trospinning,” Nano Letters, Vol. 3, No. 4, 2003, pp. 555-560. doi:10.1021/nl034039o
[10] Y. Z .Yuan and B. L. Su, “Titanium Oxide Nanotubes, Nanofi-bers and Nanowires,” Colloids and Surfaces A, Vol. 241, No. 1-3, 2004, pp. 173-183.
[11] A. DiPaola, G. Marci, L. Palmisano, M. Schiavello, K. Uosaki, S. Ikeda and B. Ohtani, “Preparation of Polycrystalline TiO2 Photocatalysts Impregnated with Various Transition Metal Ions: Characterization and Photocatalytic Activity for the Degrada-tion of 4-Nitrophenol,” Journal of Physical Chemistry B, Vol. 106, 2002, pp. 637-645. doi:10.1021/jp013074l
[12] N. A. M. Barakat, M. S. Khill and H. Y. Kim, “Preparation of MnO Nanofibers by Novel Hydrothermal Treatment of Man-ganese Acetate/PVA Electrospun Nanofiber Mats,” Materials Science and Engineering B, Vo. 162, 2009, pp. 205-208.
[13] J. Arbiol, J. Cerdá, G. Dezanneau, A. Cirera, F. Peiró, A. Cor-net and J. R. Morante, “Effects of Nb Doping on the TiO2 Ana-tase-to-Rutile Phase Transition,” Journal of Applied Physics, Vol. 92, No. 2, 2002, pp. 853-861. doi:10.1063/1.1487915
[14] M. A. Kanjwal, N. A. M. Barakat, F. A. Sheikh, M. S. Khil and H. Y. Kim, “Functionalization of Electrospun Titanium Oxide Nanofibers with Silver Nanoparticles: Strongly Effective Photocatalyst,” International Journal of Applied Ceramics Technology, Vol. 7, Suppl. 1, 2010, pp. E54-E63.
[15] N. A. M. Barakat, K. D. Woo, M. A. Kanjwal, K. E. Choi, M. S. Khil and H.Y. Kim, “Surface Plasmon Resonances, Optical Properties and Electrical Conductivity Thermal Hystersis of Silver Nanofibers Produced by Electrospinning Technique,” Langmuir, Vol. 24, 2008, pp. 11982- 11987.
[16] T. Nikolajsen, T. Leosson, K. Salakutdinov and S. Bozhevolnyi, “Surface Plasmon Polariton Based Modulators and Switches Operating at Telecom Wavelengths,” Applied Physics Letters, Vol. 85, 2004, pp. 5833-5836. doi:10.1063/1.1835997
[17] K. H. Ko, Y. C. Lee and Y. J. Jung, “Enhanced Efficiency of Dye-Sensitized TiO2 Solar Cells (DSSC) by Doping of Metal Ions,” Journal of Colloid and Interface Science, Vol. 283, No. 2, 2005, pp. 482-487. doi:10.1016/j.jcis.2004.09.009
[18] W. Sigmund, J. Yuh, H. Park, V. Maneeratana, G. Pyrgiotakis, A. Daga, J. Taylo and J. C. Nino, “Processing and Structure Relationships in Electrospinning of Ce- ramic Fiber Systems,” Journal of American Ceramic Society, Vol. 89, No. 2, 2006, pp. 395-407. doi:10.1111/j.1551-2916.2005.00807.x
[19] N. A. M. Barakat and H. Y. Kim, “Metal Oxides Nanostruc-tures and Their Applications,” American Scientific Publisher, Stevenson Ranch, 2009.
[20] M. S. Islam and M. R. Karim, “Fabrication and Characteriza-tion of Poly(Vinyl Alcohol)/Alginate Blend Nanofibers by Electrospinning Method,” Colloids and Surfaces A, Vol. 366, No. 1-3, 2010, pp. 135-140.
[21] A. R. Abbasi and A. Morsali, “Ultrasound-Assisted Coating of Silk Yarn with Silver Chloride Nanoparticles,” Colloids and Surfaces A, Vol. 371, No. 1, 2010, pp. 113- 118.
[22] B. Ding, C. K. Kim, H. Y. Kim, M. S. Khil and S. Park, “Tita-nium Dioxide Nanofibers Prepared by Using Electrospinning Method,” Fibers and Polymers, Vol. 5, 2005, pp. 105-109.

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