Relationship between TiO2 particle size and reactor diameter in solar photoreactors efficiency

P. Fernández-Ibáñez, S. Malato, F. J. De Las Nieves

Research output: Contribution to journalArticlepeer-review

77 Citations (Scopus)


The optimal experimental conditions for photocatalysis are determined for a cylindrical non-concentrating photoreactor using a TiO2 catalyst suspension using technical grade Imidacloprid (50 mg/l) as a model compound, two different particle sizes (obtained by several preparation protocols) of the same TiO2 (Degussa P25) and three concentrations (50, 200 and 500 mg/l) to test the optimal TiO2 concentration. Three inner diameters of reactor were also tested for the best dimension for each catalyst concentration. These experiments have demonstrated that the optimum conditions tested were 2.55 cm inner diameter, 200 mg TiO2/l and 300 nm mean particle size. At the same time, the influence of the relationships between the three parameters studied (catalyst concentration, particle size and reactor diameter) is discussed.

Original languageEnglish
Pages (from-to)195-204
Number of pages10
JournalCatalysis Today
Issue number2-3
Publication statusPublished (in print/issue) - 3 Dec 1999


  • Colloidal suspension
  • Imidacloprid
  • Photoreactor efficiency
  • Solar photocatalysis
  • Titanium dioxide


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