Photocatalytic degradation of rhodamine B Dye with high purity anatase nano-TiO₂ synthesized by a hydrothermal method

Abstract

High purity anatase nano-TiO₂ powders with high photocatalytic activity were prepared by a hydrothermal synthesis method. X-ray diffraction (XRD), field emission transmission electron microscopy (FETEM), ultraviolet-visible (UV-Vis) light absorption spectrum and photoluminescence (PL) spectrum were adopted to characterize the catalyst. Effects of temperature, time and sol concentration of hydrothermal synthesis on particle size and phases were investigated. Photocatalytic activities in the degradation of Rhodamine B Dye were studied. The experimental results indicated that photocatalytic activity of the nano-TiO₂ powers was much higher than that of P25 (Degussa).

Keywords

TiO₂ / hydrothermal synthesis / photocatalytic activity / high purity anatase

References

[1] Matos J., Laine J., Herrman J. M. Synergy Effect in the Photocatalytic Degradation of Phenol on a Suspended Mixture of Titania and Activated Carbon[J]. Appl. Catal. B: Environ., 1998, 18: 281-291.

[2] Herrman J. M., Matos J., Disdier J., . Solar Photocatalytic Degradation of 4-chlorophenol Using the Synergistic Effect between Titania and Activated Carbon in Aqueous Suspension[J]. Catal. Today, 1998, 54: 255-265.

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

[4] Linsebiger A. L., Lu G. Q., Yates J. T. Photocatalysis on TiO₂ Surfaces: Principles, Mechanisms, and Selected Results[J]. Chem. Rev., 1995, 95: 735-758.

[5] Liu S. X., Qu Z. P., Han X. W., . A mechanism for Enhanced Photocatalytic Activity of Silver-loaded Titanium Dioxide[J]. Catal. Today, 2004, 93–95: 877-884.

[6] Kim C. S., Moon B. K., Park J. H., . Synthesis of Nanocrystalline TiO₂ in Toluene by a Solvothermal Route[J]. J. Cryst. Growth, 2003, 254: 405-410.

[7] Wang C., Deng Z. X., Zhang G., . Synthesis of Nanocrystalline TiO₂ in Alcohols[J]. Powder Technol., 2002, 125: 39-44.

[8] Kang M., Kim B. J., Cho S. M., . Decomposition of Toluene Using an Atmospheric Pressure Plasma/TiO₂ Catalytic System[J]. J. Mol. Catal. A: Chem., 2002, 180: 125-132.

[9] Kominami H., Kohno M., Takada Y., . A New Synthetic Method for Nano-sized, Thermally Stable Titanium(IV) Oxide[J]. Ind. Eng. Chem. Res., 1999, 38: 3925-3931.

[10] Nam H. D., Lee B. H., Kim S. J., . Preparation of Ultrafine TiO₂ Powders from Aqueous TiCl4 Solution by Precipitation[J]. Jpn. J. Appl. Phys., 1998, 37: 4603-4608.

[11] Su C., Hong B. Y., Tseng C. M. Sol-gel Preparation and Photocatalysis of Titanium Dioxide[J]. Catal. Today, 2004, 96: 119-126.

[12] Yang P., Lu C., Hua N., . Titanium Dioxide Nanoparticles Co-doped with Fe³⁺ and Eu³⁺ Ions for Photocatalysis[J]. Mater. Lett., 2002, 57: 794-801.

[13] Bessekhouad Y., Robert D., Weber J. V. Synthesis of Photocatalytic TiO₂ Nanoparticles: Optimization of the Preparation Conditions [J]. J. Photochem. Photobiol. A: Chem., 2003, 157: 47-53.

[14] Nakaso K., Okuyama K., Shimada M., . Effect of Reaction Temperature on CVD-made TiO₂ Primary Particle Diameter[J]. Chem. Eng. Sci., 2003, 58: 3327-3335.

[15] Kominami H., Kalo J., Takada Y., . Novel Synthesis of Microcrystalline Titanium(IV) Oxide Having High Thermal Stability and Ultra-high Photocatalytic Activity: Thermal Decomposition of Titanium(IV) Alkoxide in Organic Solvents[J]. Catal. Lett., 1997, 46: 235-240.

[16] Supphasrirongjaroen P., Praserthdam P., Panpranot J., . Effect of Quenching Medium on Photocatalytic Activity of Nano-TiO₂ Prepared by Solvothermal Method[J]. Chem. Eng. J., 2008, 138: 622-627.

[17] Ma Y., Yao J. N. Comparison of Photodegradative Rate of Rhodamine B Assisted by two Kinds of TiO₂ Films[J]. Chemosphere, 1999, 38: 2407-2414.

[18] Zhao J. C., Wu T. X., Wu K. Q., . Photoassisted Degradation of Dye Pollutants. 3. Degradation of the Cationic Dye Rhodamine B in Aqueous Anionic Surfactant/TiO₂ Dispersions under Visible Light Irradiation: Evidence for the need of Substrate Adsorption on TiO₂ Particles[J]. Environ. Sci. Technol., 1998, 3: 6845-6851.

[19] Shi X. L., Wang S., Dong X. B., . Enhanced Photocatalytic Activity of Titanium Dioxide by Nut Shell Carbon[J]. J. Hazard. Mater., 2009, 167: 692-695.

[20] Li G. S., Li L. P. High Purity Anatase TiO₂ Manocrystals: Near Room-temperature Synthesis, Grain Growth Kinetics, and Surface Hydration Chemistry[J]. J. Am. Chem. Soc., 2005, 127: 8659-8666.

[21] Quan X. J., Zhao Q. H., Tan H. Q., . Comparative Study of Lanthanide Oxide Doped Titanium Dioxide Photocatalysts Prepared by Coprecipitation and Sol-gel Process[J]. Mater. Chem. Phys., 2009, 114: 90-98.

[22] Yan P. F., Wang J. Q., Jiang X., . Preparation and Photocatalytic Properties of Iron-doped TiO₂ nanocrystal[J]. Mater. Sci. Technol., 2002, 10: 28-31.

[23] Wang S., Shi X. L., Shao G. Q., . Preparation, Characterization and Photocatalytic Activity of Multi-walled Carbon Nanotube-Supported Tungsten Trioxide Composites[J]. J. Phys. Chem. Solids, 2008, 69: 2396-2400.

[24] Oh Y. C., Bao Y., Jenks W. S. Isotope Studies of Photoea-talysis TiO₂-mediated Degradation of Dimethyl Phenylphosphonate[J]. J.Photochem. Photobio.A: Chem., 2003, 161: 69-77.