Development of Titania Nanotubes Loaded with Au Nanoparticles and their Opto-electronic Response under UV Light

Au nanoparticles surface-modified titania nanotubes were produced by direct-current(DC) magnetic sputtering technology.The morphology of the nanotubes was characterized by X-ray diffractometry(XRD) and field emission scanning electron microscope(FESEM).Opto-electronic properties were tested under UV light.Comparing with original titania nanotubes,Au/TiO2 nanotubes can generate the photocurrent with great improvements in constant potential and dynamic potential.At constant potential(1.0V) test under UV light,the photovoltaic current generated by Au/TiO2 is 0.4mA,1.8-fold of original nanotubes'.While at dynamic photocurrent(-1.5V to 1.5V) test,the photocurrent has reached 0.75mA,which is 3.75-fold of that for original nanobubes under the scan voltage of 1.5V.