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Photocatalytic activity of erbium-doped TiO2 nanoparticles immobilized in macro-porous silica films |
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| Authors: | J Castañeda-Contreras VF Marañón-Ruiz R Chiu-Zárate H Pérez-Ladrón de Guevara R Rodriguez C Michel-Uribe |
| Affiliation: | 1. Laser Centre, Ibnu Sina Institute for Scientific and Industrial Research, Universiti Teknologi Malaysia, Skudai, Johor 81310 Malaysia;2. Centre of Excellence in Solid State Physics, University of the Punjab, QAC, Lahore 54590, Pakistan;3. Chemistry Department, Faculty of Science, Universiti Teknologi Malaysia, Johor Bahru 81310, Malaysia |
| Abstract: | A macro-porous silica film served as mechanical support to immobilize TiO2 nanoparticles, which were doped with erbium. The films and the nanoparticles were prepared by sol–gel route. The nanoparticles exhibited photocatalytic activity under visible light. We obtained a degradation rate of methylene blue that followed first order kinetics. The sensitization of the nanoparticles to visible light was attributed to a red shift in the band-gap of the TiO2 due to the addition of erbium ions. |
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