Photocatalytic activity and electron field emission of necked ZnO:Bi nanowires

摘要

Bismuth-doped ZnO nanowires were synthesized by a vapor transfer process at 600°C. Raman spectra revealed that a slight blueshift occurred in ZnO:Bi (438 cm~(-1)) nanowires in contrast to ZnO (436 cm~(-1)) nanowires. The X-ray photoelectron spectrum showed that the ZnO:Bi nanowires contained the Bi dopant as Bi~0 and Bi~(3+). The turn-on fields of the ZnO:Bi and ZnO nanowires were ～4.19 and 6.57 V/μm, respectively. Because the ZnO:Bi nanowires exhibited a redshift of absorbance spectrum with a high ratio in the UV range, the photocatalytic activities of ZnO:Bi nanowires were considered superior to those of ZnO nanowires.