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.
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