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Enhanced photocatalytic activity and stability of nano-scaled TiO2 co-doped with N and Fe |
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| Authors: | Shaozheng Hu Fayun LiZhiping Fan Chein-Chi Chang |
| Affiliation: | a Institute of Eco-environmental Sciences, Liaoning Shihua University, Fushun 113001, PR China b Department of Chemical Engineering, Bioengineering, and Environmental Engineering, University of Maryland, Baltimore County, Baltimore, MD 21250, United States c Department of Engineering and Technical Services, D. C. Water and Sewer Authority, Washington, DC 20032, United States |
| Abstract: | Titanium dioxide (TiO2) nanoparticles co-doped with N and Fe were prepared via modified sol-gel process. The products were characterized by transmission electron microscopy (TEM), N2 adsorption, X-ray diffraction (XRD), Raman spectroscopy, UV-vis spectroscopy, photoluminescence (PL), and X-ray photoelectron spectroscopy (XPS). It is shown that the prepared TiO2 particles were less than 10 nm with narrow particle size distribution. The addition of MCM-41 caused the formation of Ti-O-Si bond which fixed the TiO2 on MCM-41 surface, thus restricted the agglomeration and growth of TiO2 particles. The photocatalytic performance in the degradation of methylene blue showed that N, Fe co-doped TiO2 exhibited much higher photocatalytic activity than doped sample with nitrogen or Fe3+ alone under both UV and visible light. N, Fe co-doping decreased the loss of doping N during the degradation reaction, thus increased the photocatalytic stability. It was also found that the nitridation time had significant influence on the photocatalytic activity of prepared TiO2 catalysts. |
| Keywords: | Titanium dioxide Co-doped Photocatalysis Fe3+ Nitrogen Stability |
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