Effect of calcination temperature on structural properties and photocatalytic activity of Mn-C-codoped TiO2
Authors:
Open Access
- 4 March 2016
- journal article
- research article
- Published by FapUNIFESP (SciELO) in Materials Research
- Vol. 19 (2) , 401-407
Abstract
Mn-C-codoped TiO2 catalysts were synthesized by modified sol-gel method based on the self-assembly technique using polyoxyethylenesorbitan monooleate (Tween 80) as template and carbon precursor and the effect of calcination temperature on their structural properties and photocatalytic activity were investigated. The XRD results showed undoped and Mn-C-codoped TiO2 calcined at 400 oC only include anatase phase and the rutile phase appears when the calcination temperature reached to 600 oC. UV-vis absorption spectroscopy demonstrates that the absorption spectra are strongly modified by the calcination temperature. Moreover, the Mn-C-TiO2 calcined at 400 oC showed the lowest PL intensity due to a decrease in the recombination rate of photogenerated electrons and holes under light irradiation. The photocatlytic activity of Mn-C-codoped TiO2 were evaluated by the degradation of methyl orange (MO) under the simulate daylight irradiation and all the prepared Mn-C-codoped TiO2 samples exhibited high photocatalytic activities for photocatalytic decolorization of methyl orange aqueous solution. At 400 oC, the Mn-C-codoped TiO2 samples showed the highest photocatalytic activity due to synergetic effects of good crystallize ation, appropriate phase composition and slower recombination rate of photogenerated charge carriers, which further confirms the calcination temperature could affect the properties of Mn-C-codoped TiO2 significantly.Keywords
This publication has 37 references indexed in Scilit:
- Determination of photo-catalytic activity of un-doped and Mn-doped TiO2 anatase powders on acetaldehyde under UV and visible lightThin Solid Films, 2011
- Solvothermal synthesis of Fe–C codoped TiO2 nanoparticles for visible-light photocatalytic removal of emerging organic contaminants in waterApplied Catalysis A: General, 2011
- Solid-phase photocatalytic degradation of polyethylene film with manganese oxide OMS-2Solid State Sciences, 2011
- Synthesis and characterization of thermally stable Sm,N co-doped TiO2 with highly visible light activityJournal of Hazardous Materials, 2010
- Synthesis, structural characterization and evaluation of sol–gel-based NF-TiO2 films with visible light-photoactivation for the removal of microcystin-LRApplied Catalysis B: Environment and Energy, 2010
- Visible light-activated N-F-codoped TiO2 nanoparticles for the photocatalytic degradation of microcystin-LR in waterCatalysis Today, 2009
- Highly Efficient Visible-Light-Induced Photocatalytic Activity of Nanostructured AgI/TiO2 PhotocatalystLangmuir, 2008
- Highly visible-light active C- and V-doped TiO2 for degradation of acetaldehydeJournal of Catalysis, 2007
- Synthesis and characterization of phosphor and nitrogen co-doped titaniaApplied Catalysis B: Environment and Energy, 2007
- The Effect of Calcination Temperature on the Surface Microstructure and Photocatalytic Activity of TiO2 Thin Films Prepared by Liquid Phase DepositionThe Journal of Physical Chemistry B, 2003