標題: Well-aligned ZnO nanowires with excellent field emission and photocatalytic properties
作者: Chu, Fu-Hsuan
Huang, Chun-Wei
Hsin, Cheng-Lun
Wang, Chun-Wen
Yu, Shih-Ying
Yeh, Ping-Hung
Wu, Wen-Wei
材料科學與工程學系
Department of Materials Science and Engineering
公開日期: 2012
摘要: Well-aligned ZnO nanowires (NWs) were successfully synthesized on Si(100) by the process of carbothermal reduction and vapor-liquid-solid method. Scanning electron microscopy and transmission electron microscopy results confirmed that ZnO NWs were single crystalline wurtzite structures and grew along the [0001] direction. The influences of substrate temperature and total pressure on the growth were discussed. The well-aligned ZnO NWs show good field emission properties, and the emitter constructed of pencil-like ZnO NWs exhibited a low turn-on field (3.82 V mu m(-1)) and a high field enhancement factor (beta 2303). Finally, we demonstrated that the as-prepared ZnO NWs with small diameter on the substrate have good photocatalytic activity toward degradation of methylene blue. Using ZnO NWs with Au nanoparticles (NPs) would decrease the recombination rate of hole-electron pairs due to the great shift of the Fermi level to the conduction band. Hence, adding Au NPs was a promising method to enhance the photocatalytic performance of ZnO NWs. It is significant that photocatalyst fabricated by ZnO NWs can apply to the degradation of organic pollution, and solve the environmental issues.
URI: http://hdl.handle.net/11536/15711
http://dx.doi.org/10.1039/c1nr10796h
ISSN: 2040-3364
DOI: 10.1039/c1nr10796h
期刊: NANOSCALE
Volume: 4
Issue: 5
起始頁: 1471
結束頁: 1475
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