Enhanced Photocatalytic Activities of Ta_2O_5 and Nitrogen Co-Doped TiO_2 under Visible Light Irradiation

摘要

Tantalum dioxide and nitrogen co-doped titanium dioxide nanopowders, denoted as (Ta_2O_5, N) co-doped TiO_2, were fabricated by a high-energy ball miller using TiO_2, Ta_2O_5 and urea as raw materials. Experiments on the photocatalytic activities of the (Ta_2O_5, N) co-doped TiO_2 were carried out in the form of photodegradation of methylene blue (MB) in aqueous solution under visible light irradiation. Enhanced photocatalytic activities were observed for the (Ta_2O_5, N) co-doped TiO_2 than commercial Degussa P25. Besides, physical, chemical and optical properties, including XRD, DRS, and XPS were detected to analyze the origins for the enhanced photocatalytic activities of the prepared samples.