The photoelectrical performance of anodized titanium sheets

<p>Anodization is a widely used method to obtain multicolored oxidized titanium sheets. However, most researchers paid great attention to the color related properties<span> of TiO</span>_{<span><span>2</span></span>}<span> nanotube</span><span> instead of photoelectrical properties</span><span> of titanium oxide film</span><span>. In this work, to study their photoelectrical properties, a series of multicolored oxidized titanium sheets were prepared by anodization method, and </span>UV-Vis absorption and photocurrents were tested<span>. </span><span>The anodized titanium sheets not only can be used as decoration material such as Jewelry, but also are supposed to be used as photoelectrical catalyst. </span><span>The </span><span>relationship between </span><span>anodization</span><span> voltages</span><span>/anodization durations</span><span> and photocurrents of titanium sheets was studied. Results show that titanium sheets have excellent photoelectric</span><span>al</span><span> performance</span><span>. </span>With the increase of anodization voltage, number of UV-Vis absorption peaks increased under visible light which means increasing absorption. When anodization duration increased, absorption band edge also increased in visible light region, which means band gap needed to produce charge transfer transition decreased. <span>Under simulated sunlight and applied voltage of +0.4V, photocurrent increase</span><span>d</span><span> with the increase of either anodiz</span><span>ation</span><span> voltage or </span><span>anodization duration</span><span>, and can be expressed by linear equations respectively.</span> <span>In addition,</span> <span>anodization currents were recorded during anodization. Morphology, crystal structure and p</span><span>hoto</span><span>electrical properties of anodized titanium sheets were characterized. </span></p>