Research on Solvothermal Synthesis of Phase Composition Controllable Nanocrystalline TiO₂ Powders

Abstract:

N-doped TiO₂ powders have been prepared by solvothermal synthesis using TiCl₃ aqueous solution as precursor. The as-synthesized powders are composed of anatase and rutile and show light-yellow in color. The grain size is ranged from 10.3 nm to 19.1 nm by Scherrer's method and the specific surface area is ranged from 21 m²/g to 122 m²/g. X-ray photoelectron spectroscopy (XPS) results indicate that N atoms have been doped into the lattice of TiO₂. Ti-N bonding and radical groups such as ×OH were detected on the surface of the powders. The synthesized N-doped TiO₂ powders shows excellent visible-light photocatalytic activities and their absorption edge have been red-shifted to 560 nm.

• Periodical: Advanced Materials Research (Volumes 284-286)
• Pages: 820-824
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.284-286.820
• Online since: July 2011
• Authors: Mei Jun Li, Wen Bin Cao
• Keywords: Nanocrystalline, N-Doped, Solvothermal Synthesis, TiO₂, Visible Light

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