Photocatalytic activity of lanthanum and sulfur co-doped TiO₂ photocatalyst under visible light

Abstract

A novel lanthanum and sulfur co-doped TiO₂ photocatalyst was synthesized by precipitation-dipping method, and characterized by X-ray diffraction(XRD), transmission electron microscopy(TEM) and UV-Vis diffuse reflectance spectroscopy. Compared with the S-doped TiO₂, La-doped TiO₂ and the standard Degussa P25 photocatalysts, the lanthanum and sulfur co-doped TiO₂ photocatalyst (the molar percentage of La is 3.0%) calcined at 450 °C for 2 h showed the strongest absorption for visible light and highest activities for degradation of reactive blue 19 dye in aqueous solution under visible light(λ>400 nm) irradiation. It was also discovered that the co-doping of lanthanum and sulfur hindered the aggregation and growth of TiO₂ particles, and the doping of lanthanum reduced slightly the phase transition temperature of TiO₂ from anatase to rutile.

Keywords

photocatalysis / TiO₂ / co-doping reactive blue 19 / visible light

References

[1] Sun B., Reddy E. P., Smirniotis P. G. Effect of the Cr⁶⁺ Concentration in Cr-incorporated TiO₂-loaded MCM-41 Catalysts for Visible Light Photocatalysis[J]. Appl. Catal. B: Environ., 2005, 57: 139-149.

[2] Colón G., Hidalgo M. C., Navío J. A. Effect of ZrO₂ Incorporation and Calcination Ttemperature on the Photocatalytic Activity of Commercial TiO₂ for Salicylic Acid and Cr (VI) Photodegradation[J]. Appl. Catal. A: Gen., 2002, 231: 185-199.

[3] Yu J. G., Xiong J. F., Cheng B., . Hydrothermal Preparation and Visible-light Photocatalytic Activity of Bi₂WO₆ Powders[J]. J. Solid State Chem., 2005, 178: 1968-1972.

[4] Kohtani S., Tomohiro M., Tokumura K., . Photooxidation Reactions of Polycyclic Aromatic Hydrocarbons over Pure and Ag-loaded BiVO₄ Photocatalysts[J]. Appl. Catal. B: Environ., 2005, 58: 265-272.

[5] Andjelka T., Dóra M. G., Miroslav K., . Photomineralization of the Herbicide Mecoprop Dissolved in Water Sensitized by TiO₂[J]. Water Res., 2000, 34: 1473-1478.

[6] Wong C. C., Chu W. The Hydrogen Peroxide-assisted Photocatalytic Degradation of Alachlor in TiO₂ Suspensions[J]. Environ. Sci. Technol., 2003, 37: 2310-2316.

[7] Yan G. Y., Wang X. X., Fu X. Z., . A Primary Study on the Photocatalytic Properties of HZSM-5 Zeolite[J]. Catal. Today, 2004, 93–95: 851-856.

[8] Hong X. T., Wang Z. P., Cai W. M., . Visible-light-activated Nanoparticle Photocatalyst of Iodine-doped Titanium Dioxide[J]. Chem. Mater., 2005, 17: 1548-1552.

[9] Tai C., Jiang G. B., Liu G. F., . Rapid Degradation of Bisphenol A Using Air as the Oxidant Catalyzed by Polynuclear Phthalocyanine Complexes under Visible Light Irradiation[J]. J. Photochem. Photobiol. A: Chem., 2005, 172: 275-282.

[10] Kumar S., Fedorov A. G., Gole J. L. Photodegradation of Ethylene Using Visible Light Responsive Surfaces Prepared from Titania Nanoparticle Slurries[J]. Appl. Catal. B: Environ., 2005, 57: 93-107.

[11] Bessekhouad Y., Robert D., Weber J. V. Bi₂S₃/TiO₂ and CdS/TiO₂ Heterojunctions as an Available Configuration for Photocatalytic Degradation of Organic Pollutant[J]. J. Photochem. Photobiol. A: Chem., 2004, 163: 569-580.

[12] Tennakone K., Bandara J. Photocatalytic Activity of Dyesensitized Tin(IV) Oxide Nanocrystalline Particles Attached to Zinc Oxide Particles: Long Distance Electron Transfer via Bballistic Transport of Electrons across Nanocrystallites[J]. Appl. Catal. A: Gen., 2001, 208: 335-341.

[13] Li X. Z., Li F. B., Yang C. L., . Photocatalytic Activity of WO_x-TiO₂ under Visible Light Irradiation[J]. J. Photochem. Photobiol. A: Chem., 2001, 141: 209-217.

[14] Liu B. S., Zhao X. J., Zhang N. Z., . Photocatalytic Mechanism of TiO₂-CeO₂ Films Prepared by Magnetron Sputtering under UV and Visible Light[J]. Surf. Sci., 2005, 595: 203-211.

[15] Yang H. M., Shi R. R., Zhang K., . Synthesis of WO₃/TiO₂ Nanocomposites via Sol-gel Method[J]. J. Alloys Compd., 2005, 398: 200-202.

[16] Zhang X. W., Zhou M. H., Lei L. H. Co-deposition of Photocatalytic Fe Doped TiO₂ Coatings by MOCVD[J]. Catal. Commun., 2006, 7: 427-431.

[17] Kumbhar A., Chumanov G. Synthesis of Iron(III)-doped Titania Nanoparticles and its Application for Photodegradation of Sulforhodamine-B Pollutant[J]. J. Nanoparticle Res., 2005, 7: 489-498.

[18] Li D., Haneda H., Labhsetwar N. K., . Visible-light-driven Photocatalysis on Fluorine-doped TiO₂ Powders by the Creation of Surface Oxygen Vacancies[J]. Chem. Phys. Lett., 2005, 401: 579-584.

[19] Shen M., Wu Z. Y., Huang H., . Carbon-doped Anatase TiO₂ Obtained from TiC for Photocatalysis under Visible Light Irradiation[J]. Mater. Lett., 2006, 60: 693-697.

[20] Lin L., Lin W., Zhu X. Y., . Uniform Carbon-covered Titania and its Photocatalytic Property[J]. J. Mol. Catal. A: Chem., 2005, 236: 46-53.

[21] Pore V., Heikkilä M., Ritala M., . Atomic Layer Deposition of TiO_2−xN_x Thin Films for Photocatalytic Applications[J]. J. Photochem. Photobiol. A: Chem., 2006, 177: 68-75.

[22] Liu Y., Chen X., Li J., . Photocatalytic Degradation of Azo Dyes by Nitrogen-doped TiO₂ Nanocatalysts[J]. Chemosphere, 2005, 61: 11-18.

[23] Wang Z. P., Cai W. M., Hong X. T., . Photocatalytic Degradation of Phenol in Aqueous Nitrogen-doped TiO₂ Suspensions with Various Light Sources[J]. Appl. Catal. B: Environ., 2005, 57: 223-231.

[24] Kasahara A., Nukumizu K., Hitoki G., . Photoreactions on LaTiO₂N under Visible Light Irradiation[J]. J. Phys. Chem. A, 2002, 106: 6750-6753.

[25] Reddy B. M., Sreekanth P. M., Reddy E. P., . Surface Characterization of La₂O₃-TiO₂ and V₂O₅/La₂O₃-TiO₂ Catalysts [J]. J. Phys. Chem. B, 2002, 106: 5695-5700.

[26] Janus M., Inagaki M., Tryba B., . Carbon-modified TiO₂ Photocatalyst by Ethanol Carbonisation[J]. Appl. Catal. B: Environ., 2006, 63: 272-276.

[27] Ohno T., Mitsui T., Matsumura M. Photocatalytic Activity of S-doped TiO₂ Photocatalyst under Visible Light[J]. Chem. Lett., 2003, 32(4): 364-365.

[28] Xie Y. B., Yuan C. W., Li X. Z. Photosensitized and Photocatalyzed Degradation of Azo Dye Using Ln ⁿ⁺-TiO₂ Sol in Aqueous Solution under Visible Light Irradiation[J]. Mater. Sci. Eng. B, 2005, 117: 325-333.

[29] Kosowska B., Mozia S., Morawski A. W., . The Preparation of TiO₂-nitrogen Doped by Calcination of TiO₂·xH₂O under Ammonia Atmosphere for Visible Light Photocatalysis[J]. Sol. Energy Mater. Sol. Cells, 2005, 88: 269-280.

[30] Umebayashi T., Yamaki T., Tanaka S., . Visible Light-induced Degradation of Methylene Blue on S-doped TiO₂[J]. Chem. Lett., 2003, 32(4): 330-331.

[31] Cen J. W., Li X. J., He M. X., . Effects of La³⁺ Non-uniformly Doping in TiO₂ Films on Photocatalytic Activities[J]. J. Rare Earth Soc.(China)., 2005, 23(6): 668-673.

[32] Ranjit K. T., Willner I., Bossmann S. H., . Lanthanide Oxidedoped Titanium Dioxide Photocatalysts: Novel Photocatalysts for the Enhanced Degradation of p-Chlorophenoxyacetic Acid [J]. Environ. Sci. Technol., 2001, 35: 1544-1549.

[33] Demeestere K., Dewulf J., Ohno T., . Visible Light Mediated Photocatalytic Degradation of Gaseous Trichloroethylene and Dimethyl Sulfide on Modified Titanium Dioxide[J]. Appl. Catal. B: Environ., 2005, 61: 140-149.