Journal
CATALYSIS COMMUNICATIONS
Volume 11, Issue 5, Pages 378-382Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.catcom.2009.11.005
Keywords
Nitrogen-doped TiO2; Template; Photocatalyst; Calcination temperature; Visible light
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Funding
- Ministry of Commerce, Industry and Energy
- Ministry of Education, Science and Technology [400-2008-0230]
- Korea Evaluation Institute of Industrial Technology (KEIT) [CO003-10-00] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Nitrogen-doped SiO2/TiO2 core/shell nanoparticles with uniform diameter were fabricated using SiO2 template sol-gel method. Furthermore, the relationship between the temperate of calcination and photocatalytic efficiency was also investigated in the viewpoint of organic pollutant decomposition. The morphology and characteristics of nitrogen-doped SiO2/TiO2 core/shell nanoparticles were studied by transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), UV-vis diffuse reflectance spectroscopy (DRS), X-ray powder diffraction (XRD), and specific surface area. The results demonstrated that nitrogen-doped TiO2 layer was successfully coated onto the SiO2 nanoparticles without aggregation. Nitrogen-doped SiO2/TiO2 core/shell nanoparticles exhibited highly efficient photocatalytic activity under visible light irradiation due to high nitrogen doping level and surface area. (C) 2009 Elsevier B.V. All rights reserved.
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