Paper Title:
Titanium Dioxide Photocatalyst - Unresolved Problems
  Abstract

The present work considers the performance of TiO2-based photosensitive oxide semiconductors as photocatalysts for water purification. This paper brings together the concepts of solid state chemistry for nonstoichiometric compounds and the concepts of photocatalysis in order to discuss the reactivity between TiO2 and water including microorganisms (bacteria and viruses). The performance of TiO2 photocatalysts are considered in terms of a model of photoelectrochemical cell. The experimental data on photocatalytic removal of microorganisms from water are considered in terms of the effect of several properties, including pH, dispersion, light intensity, and temperature. It is argued that correct understanding of the performance of TiO2 photocatalysts requires recognition that properties of TiO2, which is a nonstoichiometric compound, are determined by defect disorder and the related ability to donate or accept electrons. The photocatalytic properties of TiO2 are considered in terms of the reactivity of both anodic and cathodic sites with water and the related charge transfer at the TiO2/H2O interface. It is shown that the formation of well defined photocatalysts requires knowledge of mass and charge transfer during processing and performance, respectively. The main hurdles in the development of high-performance photocatalysts are discussed.

  Info
Periodical
Solid State Phenomena (Volume 162)
Edited by
Maria K. Nowotny and Janusz Nowotny
Pages
77-90
DOI
10.4028/www.scientific.net/SSP.162.77
Citation
T. Bak, T. Norby, J. Nowotny, M. K. Nowotny, N. Sucher, "Titanium Dioxide Photocatalyst - Unresolved Problems", Solid State Phenomena, Vol. 162, pp. 77-90, 2010
Online since
June 2010
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Gun Dae Lee, Y.J. Do, Seong Soo Park, Seong Soo Hong
Abstract:Cr, Ti-substituted TiO2-loaded MCM-41 (TiO2/Cr-Ti-MCM-41) catalysts were prepared, and their photocatalytic activities for decomposition of...
13
Authors: Yong Luan, Ping Feng Fu, Xue Gang Dai
Abstract:Nanoparticles of titanium dioxide co-doped with Fe3+ and Nd3+ were prepared using the sol-gel method. The prepared TiO2 photocatalyst was...
239
Authors: Jin Huan Li, Hong Bo Fang, Wei Wang, Gui Fan Liu, Shao Dong Zhang
Chapter 1: Material Science
Abstract:Nanocrystals with different Eu3+ doping levels (%) were prepared by sol-gel and hydrothermal synthetic method using titanium...
219
Authors: Tie Kun Jia, Fan Zhang, Xiao Feng Wang, Wei Min Wang
Chapter 1: Novel Processing and Manufacturing
Abstract:Zn-doped SnO2 seaflower like hierarchical architectures have been synthesized via a solvothermal synthesis route in the mixed solvents of...
334
Authors: Rekha Dom, Pramod H. Borse
Abstract:This article presents a comparative study on the synthesis and characterization of the binary and ternary ferrites for photocatalytic and...
334