Visible-light active (N, P)-codoped TiO 2 (NP-TiO 2) nanoparticles are prepared by one step hydrothermal method and characterized by XPS, XRD, SEM, FT-IR and UV-vis spectrum. Based on the XPS analysis, the chemical state of N in TiO 2 is identified as N-Ti-O in the anatase TiO 2 lattice, while P exists in a pentavalent-oxidation state (P 5+) or as PO43- group coordinating in TiO 2. The result confirms that the doping of phosphate would affect the crystallite size and structure of anatase. UV-vis spectra demonstrates that NP-TiO 2 could shift the absorption edge of titania to the visible-light region effectively, which could increase the visible-light photocatalytic activity. The total degradation of methylene blue (MB) and rhodamine B (RhB) is significantly faster on NP-TiO 2 samples than that on N-doped and NS-codoped TiO 2 under visible-light irradiation.
All Science Journal Classification (ASJC) codes
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry