Preparation of the TiO2 photocatalyst using pressurized ammonia

• Authors: Beata Wawrzyniak , Magdalena Janus , Barbara Grzmil , Antoni Morawski
• Languages of publication: EN

Abstracts

EN

The industrial hydrated amorphous titanium dioxide (TiO2ċ xH2O) was modified by treatment inside a chemical reactor under elevated pressure at low temperatures for 4 hours in an ammonia atmosphere. On the basis of the FTIR/DRS analysis the presence of nitrogen was confirmed. The XRD patterns of all of the catalysts exhibit mainly the diffraction lines of anatase phases. The photocatalytic activity of the modified photocatalysts was determined and compared to TiO2-P25 (Degussa, Germany). The high rate of phenol and dye degradation was obtained for the catalysts modified at 180°/15atm. TiO2-P25 showed similar activity in phenol decomposition like TiO2-15bar, whereas it was more active in dye decomposition.

Keywords

EN

photocatalysis; TiO2-nitrogen; dye decolorization; TiO2 preparation under pressure

• Publisher: De Gruyter Open
• Journal: Polish Journal of Chemical Technology
• Year: 2007
• Volume: 9
• Issue: 1
• Pages: 51-56

Dates

published

1 - 1 - 2007

online

3 - 7 - 2007

Contributors

author

Beata Wawrzyniak

• Institute of Chemical and Environment Engineering, Szczecin University of Technology, ul. Pulaskiego 10, 70-322 Szczecin, Poland

author

Magdalena Janus

• Institute of Chemical and Environment Engineering, Szczecin University of Technology, ul. Pulaskiego 10, 70-322 Szczecin, Poland

author

Barbara Grzmil

• Institute of Chemical and Environment Engineering, Szczecin University of Technology, ul. Pulaskiego 10, 70-322 Szczecin, Poland

author

Antoni Morawski

• Institute of Chemical and Environment Engineering, Szczecin University of Technology, ul. Pulaskiego 10, 70-322 Szczecin, Poland

References

• Tang J., Zou Z., Yin J., Ye J.: Photocatalytic degradation of methylene blue on CaIn2O4 under visible light irradiation, Chememical Physical Letter, 2003, 382, 175.
• Yamashita H., Harada M., Misaka J., Takeuchi M., Neppolian B., Anpo M.: Photocatalytic degradation of organic compounds diluted in water using visible light-responsive metal ion-implanted TiO2 catalysts: Fe ion-implanted TiO2, Catalysis Today, 2003, 84, 191.
• Moon J., Yun C. Y., Chung K. W., Kang M. S., Yi J.: Photocatalytic activation of TiO2 under visible light using Acid Red 44, Catalysis Today, 2003, 87, 77.
• Guillard C., Disdier J., Monnet C., Dussaud J., Malato S., Blanco J., Maldonado M. I., Herrmann J. M.: Solar efficiency of a new deposited titania photocatalyst: chlorophenol, pesticide and dye removal applications, Applied Catalysis B: Environmental, 2003, 46, 319.
• Shifu C., Lei C., Shen G., Gengyu C.: The preparation of nitrogen-doped photocatalyst TiO2-xNx by ball milling, Chemical Physical Letter, 2005, 413, 404.
• Joung S. K, Amemiya T., Murabayashi M., Itoh K.: Relation between photocatalytic activity and preparation conditions for nitrogen-doped visible light-driven TiO2 photocatalysts, Applied Catalysis A: General, 2006, 312, 20.
• Silveyra R., De La Torre Sáenz L., Flores W. A., Martínez C., Elguézabal A. A.: Doping of TiO2 with nitrogen to modify the interval of photocatalytic activation towards visible radiation, Catalysis Today, 2005, 107 - 108, 602.
• Asahi R., Morikawa T., Ohwaki T., Aoki K., Taga Y., Visible-Light Photocatalysis in Nitrogen-Doped Titanium Oxides, Science, 2001, 293, 269.
• Ihara T., Miyoshi M., Iriyama Y., Matsumoto O., Sugihara S.: Visible-light-active titanium oxide photocatalyst realized by an oxygen-deficient structure and by nitrogen doping Applied Catalysis B: Environmental, 2003, 42, 403.
• Sawabe Y., Sakatani Y., Kolke H.: EU Patent EP 1138634A1, 2001.
• Yuan J., Chen M., Shi J., Shangguan W.: Preparations and photocatalytic hydrogen evolution of N-doped TiO2 from urea and titanium tetrachloride, International Journal of Hydrogen Energy, 2006, 31, 1326.
• Jang J. S., Kim H. G., Ji S. M., Bae S. W., Jung J. H., Shon B. H., Lee J. S.: Formation of crystalline TiO2-xNx and its photocatalytic activity, Journal of Solid State Chemistry, 2006, 179, 1067.
• Koneko M., Okura I.: Photocatalysis Science and Technology, Kodansha, Springer, Japonia, 2002.
• Mozia S., Tomaszewska M., Kosowska B., Grzmil B., Morawski A. W., Kałucki K.: Decomposition of nonionic surfactant on a nitrogen-doped photocatalyst under visiblelight irradiation, Applied Catalysis B: Environmental, 2005, 55, 195.
• Kosowska B., Mozia S., Morawski A. W., Grzmil B., Janus M., Kałucki K.: The preparation of TiO2-nitrogen doped by calcination of TiO2 ·xH2O under ammonia atmosphere for visible light photocatalysis, Solar Energy Materials and Solar Cells, 2005, 88, 269.
• Irie H., Watanabe Y., Hashimoto K., Nitrogen-Concentration Dependence on Photocatalytic Activity of TiO2-xNx Powders, Journal of Physical Chemistry B, 2003, 107, 5483.

Identifiers

DOI

10.2478/v10026-007-0012-0