Abstract
Abstract Nitrogen-doped titania (N-doped TiO2) and nitrogen-carbon co-doped titania (N-C-doped TiO2) were prepared in metal-organic chemical vapor deposition (MOCVD) processes under the controlled reaction atmosphere. The N-doped TiO2 and N-C-doped TiO2 with anatase phase were prepared at 600Â oC under N2-O2-NH3 and N2-NH3 atmospheres respectively. The N-C-doped TiO2 exhibited the high photocatalytic activity for the oxidation of NO under visible-light illuminations. The chamber atmosphere in the MOCVD process plays an important role on the surface lattice structure and nitrogen and carbon content of TiO2. The nitrogen and carbonaceous species on the TiO2 surface, evidenced from X-ray diffractometry (XRD), UV-VIS, and Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS), were inferred as important factors for narrowing band gap of titania and enhancement of its visible-light-responsive activity.
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