期刊
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
卷 191, 期 -, 页码 28-32出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.mseb.2014.10.008
关键词
ZnO NWAs; Exposure time; Photocatalysis; Degradation
资金
- Key grant Project of Chinese Ministry of Education [309027]
- National Science Fund for Distinguished Young Scholars [50925103]
We have successfully fabricated self-supporting ZnO nanowire arrays (NWAs) by recently proposed versatile hydrothermal process. The effect of exposure time on microstructure and photocatalytic performance of ZnO NWAs has been analyzed for the first time, which is the main finding of the present work. Specifically, with increasing exposure time, the vertical alignment is improved and the diameter of NWAs is decreased. Under 15 min exposure time, the obtained ZnO NWAs exhibit the most uniform, dense, and thin arrays. SEM images show that all the NWAs are about 200-300 nm in diameter and 9 pm in length. Furthermore, photocatalytic tests indicated that the as-prepared ZnO NVVAs exposed with 15 min exhibited the best activity for photo-degradation of organic dye under UV light irradiation. After 5 recycles, the sample did not exhibit an obvious loss in activity, confirming its good activity upon recycling. (C) 2014 Elsevier B.V. All rights reserved.
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