Photocatalytic activity of Mo+Fe Co-doped titanium dioxide nanoparticles prepared by Sol-Gel method

Abstract

Mo+Fe co-doped TiO₂ nano powders were synthesised by sol-gel method. X-ray diffraction and transmission electronic microscopy morphologies showed that the Mo+Fe co-doped TiO₂ nano powders were pure anatase phase, with the average crystallite size around 20 nm. UV-Vis and photocatalic activity measurements show that this Mo+Fe co-doped TiO₂ can absorb visible light, have higher separation efficiency of photoinduced electrons and holes, and possess higher photocatalytic activity compared with anatase TiO₂. The enhanced photocatalytic activity of Mo+Fe co-doped TiO₂ verified that doping by transition metal ions can also modify the energy band and reduce the recombination centers in TiO₂.

Keywords

Mo+Fe co-doped TiO₂ / anatase / photocatalytic activity

References

[1] Fujishima A., Zhang X. T., Tryk D. A. TiO₂ Photocatalysis and Related Surface Phenomena[J]. Surf. Sci. Rep., 2008, 63(12): 515-582.

[2] Liu G., Wang L. Z., Yang H. G., . Titania-based Photocatalysts—Crystal Growth, Doping and Heterostructuring[J]. J. Mater. Chem., 2010, 20(5): 831-843.

[3] Chen X. B., Mao S. S. Titanium Dioxide Nanomaterials: Synthesis, Properties, Modifications, and Applications[J]. Chem. Rev., 2007, 107(7): 2 891-2 959.

[4] Khan S. U. M., Al-Shahry M., Ingler W. B. Jr. Efficient Photochemical Water Splitting by a Chemically Modified n-TiO₂[J]. Science, 2002, 297(5590): 2 243-2 245.

[5] Hoffmann M. R., Martin S. T., Choi W., . Environmental Applications of Semiconductor Photocatalysis[J]. Chem. Rev., 1995, 95(1): 69-96.

[6] Gai Y. Q., Li J. B., Li S. S., . Design of Narrow-Gap TiO2: A Passivated Codoping Approach for Enhanced Photoelectrochemical Activity[J]. Phys. Rev. Lett., 2009, 102(3): 036 402

[7] Zhu W. G., Qiu X. F., Lancu V., . Band Gap Narrowing of Titanium Oxide Semiconductors by Noncompensated Anion-Cation Codoping for Enhanced Visible-Light Photoactivity[J]. Phys. Rev. Lett., 2009, 103(22): 226 401

[8] Shirley R., Kraft M., Inderwildi O. R. Electronic and Optical Properties of Aluminium-doped Anatase and Rutile TiO₂ from ab initio Calculations[J]. Phys. Rev. B, 2010, 81(7): 075 111

[9] Wu Z. B., Jin R. B., Liu Y., . Ceria Modified MnOx/TiO2 as a Superior Catalyst for NO Reduction with NH₃ at Low-temperature[J]. Catal. Commun., 2008, 9(13): 2 217-2 220.

[10] Shang Y. L., Huo L., Jia Y. L., . Electrorheological Property of M-doped (M=Na, Zr) Nano-sized TiO₂ Particle Materials, Influence of Surface Composition and Microstructure[J]. Colloids and Surfaces A, 2008, 325(3): 160-165.

[11] Weng H. M., Yang X. P., Dong J. M., . Electronic Structure and Optical Properties of the Co-doped Anatase TiO₂ Studied from First Principles[J]. Phys. Rev. B, 2004, 69(12): 125 219

[12] Sasikala R., Shirole A. R., Sudarsan V., . Enhanced Photocatalytic Activity of Indium and Nitrogen Co-doped TiO₂-Pd Nanocomposites for Hydrogen Generation[J]. Applied Catalysis A: General, 2010, 377(1): 47-54.

[13] Kubacka A., Bachiller-Baeza B., Colón G., . Doping Level Effect on Sunlight-driven W,N-co-doped TiO₂-anatase Photo-catalysts for Aromatic Hydrocarbon Partial Oxidation[J]. Applied Catalysis B: Environmental, 2010, 93(3): 274-281.

[14] Mai L. Q., Hu B., Chen W., . Lithiated MoO₃ Nanobelts with Greatly Improved Performance for Lithium Batteries[J]. Advanced Materials, 2007, 19(21): 3 712-3 716.

[15] Jin W., W C., Li Y., . The Effect of Surface Morphology on the Response of Fe₂O₃-loaded Vanadium Oxide Nanotubes Gas Sensor[J]. Appl. Surf. Sci., 2011, 257(16): 7 071-7 075.