Photo-Catalytic Nanometer Composite-Crystal TiO2 Powder Synthesized by Two-Step Method

Document Type: Research Article

Authors

1 College of Chemistry and Environmental Science, Hebei University, Baoding 071002, CHINA

2 Physic Experimental Center, Hebei University, Baoding 071002, CHINA

Abstract

TiCl4, ammonia, inorganic salts as raw material, nanometer composite-crystal TiO2 powders were synthesized by two-step chemical method. Precursors were crystallized with different phase and stable composite-crystal TiO2 with anatase and rutile phase was prepared at low temperature. Quantitative control of crystal phase was realized. Remarkable factors including reaction pH value, reaction time, which affected the phase content, microstructure, morphology were discussed. Applied experiments of photo-degradation organic dyes illuminated by sunshine showed higher photocatalytic activity of composite-crystal than that of pure anatase, pure rutile and mechanical mixture of both, nanometer composite-crystal TiO2 as photocatalyst.

Keywords

Main Subjects


[1] Cotton F. A., Wilkinson G., "Advanced Inorganic Chemistry", 5th Ed., pp. 654-655, John Wiley, New York, (1988).
[2] Fujishima A., Honda K., Electrochemical Photolysis of Water at a Semiconductor Electrode, Nature, 238, p. 37 (1972).
[3] O’Regan B., Gratzel M., A Low-Cost, High-Efficiency Solar Cell Based on Dye-Sensitized Colloidal TiO2 Films, Nature, 3558, p.737 (1991).
[4] Mills A., Hunte S.L.,An Overview of Semiconductor Photocatalysis, Journal of Photochemistry and Photobiology A., 108, p. 1 (1997).
[5] Banfield J.F., Veblen D.R., Smith D.J., The Identification of a New TiO2 Mineral as TiO2(B) by Structure Determination Using Highresolution Microscopy, Image Simulatio, and Distance-Ieast-Squares Refinement, American Mineralogist, 76, p. 343 (1991).
[6] Seok D.S., Lee J.K., Kim H., Preparation of Nanotube-Shaped TiO2 Powder, Journal of Crystal Growth, 229, p. 428 (2001).
[7] Fang C.S., Chen Y.W., Preparation of Titania Particles by Thermal Hydrolysis of TiCl4 in N-Propanol Solution, Materials Chemistry and Physics, 78, p. 739 (2003).
[8] Kim K.D., Kim H.T., Synthesis of Titanium Dioxide Nanoparticles Using a Continuous Reaction Method, Colloids and Surfaces, A: Physicochemical and Engineering Aspects, 207, p. 263 (2002).
[9] Chu R.H., Yan J.C., Lian S.Y., Shape-Controlled Synthesis of Nanocrystalline Titania at Low Temperature, Solid State Communications, 130, p. 789 (2004).
[10] Wang Y.Q., Hu G.Q., Duan X.F., Microstructure and Formation Mechanism of Titanium Dioxide Nanotubes, Chemical Physicals Letters, 365, p. 427 (2002).
[11] Augustynski  J.,  The  Role  of  the  Surface Intermediates in the Photoelectrochemical Behaviour of Anatase and Rutile TiO2, Electrochem. Acta, 38, p. 43 (1993).
[12] Bickley  R.I.,  Gonzalez-Carreno  T.,  Lees  J.S., Palmisano L., A Structural Investigation of Titanium Dioxide Photocatalysts, Journal Solid State Chem., 92, p. 178 (1991).
[13] Spur R.A., Myers W., Quantitative Analysis of Anantase-Rutile Mixtures with an X-Ray Diffractometer, Analytical Chemistry, 29, p. 760 (1957).
[14] Maki T., Effect of pH Ti(SO4)2 Solution on Properties of Hydrous Ti(IV) Oxide Precipitated from the Solution, Nippo Kagaku Kaishi, 8, p. 45 (1978).
[15] Zhang Y.,  Shi E.,  Chen Z.,  Influence of Solution Concentration on the Hydrothermal Preparation of Titania Crystallites, Mater. Chem., 11, p. 1547 (2001).
[16] Yin S.,  Hasegawa H.,  Maeda D.,  Synthesis of Visible-Light-Active Nanosize Rutile Titania Photocatalyst by Low Temperature Dissolution-Reprecipitation, Journal of Photochemistry and Photobiology A: Chemistry, 63, p. 1 (2004).