文摘
Subtleties in the synthesis of materials can have a profound effect on the catalytic and photocatalytic properties of materials. Black TiO<sub>2sub> nanotubes, demonstrating remarkable solar absorption, were synthesized using a stainless steel reactor. Using UV鈥搗is diffuse reflectance spectroscopy, XPS, EDS, ICP, and TEM, the change in electronic absorption of the TiO<sub>2sub> nanotubes is explained by the discrete introduction of Cr concentrated particles from the stainless steel reactor. The black TiO<sub>2sub> nanotubes displayed significant solar-driven photocatalytic activity with the photo-oxidation of acetaldehyde under visible light (位 > 450 nm).r>Keywords:
titanium oxide; titantia; nanotubes; photocatalysis; chromium