TiO2纳米管负载纳米金的制备及其在紫外光下的光电性能(英文)

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

利用直流磁控溅射法制备纳米金颗粒表面改性TiO2纳米管,并通过XRD,FESEM对其结构进行表征.在紫外光下测试其光电效应,结果发现在定电位和动电位下,纳米金改性后的TiO2纳米管产生的光电流都要比未改性的TiO2纳米管大.在定电位下(1.0V),Au/TiO2纳米管产生的光电流为0.4mA,是TiO2纳米管的1.8倍.在动电位下(-1.5～1.5V),当电位达1.5V时,Au/TiO2纳米管产生的光电流为0.75mA,是TiO2纳米管的3.75倍.

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.