สุภัทร์พร เทียนงาม. Synthesis and Activity Test of the Visible Light Activated Titanium Dioxide. Master's Degree(Environmental Engineering). King Mongkut's University of Technology Thonburi. KMUTT Library. : King Mongkut's University of Technology Thonburi, 2010.
Synthesis and Activity Test of the Visible Light Activated Titanium Dioxide
Abstract:
This research evaluated the photocatalytic characteristics of titanium dioxide
synthesized by sol-gel method, doped with tungsten, and treated with hydrothermal
process by using 2-chlorophenol as the target pollutant. Studied parameters included
light wavelength, pH, and 2-chlorophenol concentration. The results indicated that the
synthetic titanium dioxide could absorb energy within the visible light region much
better than the Degussa P-25. A photocatalytic activity test revealed that the synthetic
titanium dioxide could oxidize 2-chlorophenol under blue light irradiation almost
comparable to Degussa P-25 with UV light irradiation. The optimum pH for the
photocatalytic oxidation of 2-chlorophenol was 5. Photocatalytic behavior could be
sufficiently explained by Langmuir-Hinshelwood equation with the equilibrium
absorption constant and the reaction rate constant of 68.58 l/mM and 2.7692x10-4
mM/min, respectively.