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How photocatalytic activity of the MAO-grown TiO2 nano/micro-porous films is influenced by growth parameters?

Bayati, M. R ; Sharif University of Technology | 2010

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  1. Type of Document: Article
  2. DOI: 10.1016/j.apsusc.2010.02.011
  3. Publisher: 2010
  4. Abstract:
  5. Pure titania porous layers consisted of anatase and rutile phases, chemically and structurally suitable for catalytic applications, were grown via micro-arc oxidation (MAO). The effect of applied voltage, process time, and electrolyte concentration on surface structure, chemical composition, and especially photocatalytic activity of the layers was investigated. SEM and AFM studies revealed that pore size and surface roughness of the layers increased with the applied voltage, and the electrolyte concentration. Moreover, the photocatalytic performance of the layers synthesized at medium applied voltages was significantly higher than that of the layers produced at other voltages. About 90% of methylene blue solution was decomposed after 180 min UV-irradiation on the layers produced in an electrolyte with a concentration of 10 g l-1 at the applied voltage of 450 V
  6. Keywords:
  7. Micro-arc oxidation ; AFM ; Applied voltages ; Catalytic applications ; Chemical compositions ; Concentration of ; Electrolyte concentration ; Growth parameters ; Methylene blue solution ; Oxide materials ; Photocatalytic activities ; Photocatalytic performance ; Porous film ; Porous layers ; Process time ; Rutile phasis ; SEM ; TiO ; UV irradiation ; Cavity resonators ; Electrolytes ; Oxide minerals ; Photocatalysis ; Surface roughness ; Surface structure ; Titanium ; Titanium dioxide ; Titanium oxides ; Catalytic oxidation
  8. Source: Applied Surface Science ; Volume 256, Issue 13 , 2010 , Pages 4253-4259 ; 01694332 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S0169433210001753