Abstract
Nitrogen-doped TiO 2 nanophotocatalysts were prepared, and characterized by XRD patterns and UV–vis spectroscopy. The results indicated that nitrogen was doped effectively and the shift of the absorption edge to a lower energy and a stronger absorption in the visible light region were observed. The calcinations temperature is a key factor to narrow the band gap of titania, and consequently affects the response to visible light of nitrogen-doped TiO 2 nanocrystals. This photocatalyst can effectively inhibit the growth of Helminthosporium maydis, whereas undoped TiO 2 nanocrystals cannot inhibit the growth of H. maydis under the same experimental conditions.
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