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Study Findings from Sichuan University Broaden Understanding of Nanotubes (Preparation and photocatalytic performance of ZrO2 nanotubes fabricated...

July 4, 2014



Study Findings from Sichuan University Broaden Understanding of Nanotubes (Preparation and photocatalytic performance of ZrO2 nanotubes fabricated with anodization process)

By a News Reporter-Staff News Editor at Science Letter -- Fresh data on Nanotubes are presented in a new report. According to news reporting from Chengdu, People's Republic of China, by NewsRx journalists, research stated, "Anodization process is a facile method to prepare structured nano-material. In this research, anodization process of zirconium in (NH4)2504/NH4F solution was studied systematically and the anodized zirconia was applied to degrade methyl orange (MO) solution under UV irradiation and compared with anodized titania nanotubes to determine the photoactivity of zirconia nanotubes."

The news correspondents obtained a quote from the research from Sichuan University, "After anodization in aqueous electrolyte containing 1 M (NH4)2504 and 0.25 wt% NH4F for 120 min at 20V, zirconia nanotubes (ZNT) with diameters of about 20 nm and lengths of about 600 nm were formed. The growth mechanism of ZNT was studied with SEM and TEM. The hypothesis of ZNT growth, in which electric etching process started at the pits and further to deepen in situ to form nanotubes, was confirmed by the SEM. The anodization process on the sanded rough Zr foil verified this assumption since the growth of ZNT occurred at the bottom of the ripples on Zr foil and gathered to form bundles at the peaks. The as-grown ZNT is a mixture of monoclinic and tetragonal Zr02 crystals, which transforms into pure monoclinic structure after annealed at 300 C. The unannealed ZNT has excellent photocatalytic performance with a MO photo-degradation rate of 94.45% after 4 h, even if contrasting to anodized titania."

According to the news reporters, the research concluded: "Reusing experiments confirmed that the decaying of photocatalytic performance of ZNT can be negligible in 6 times recycling."

For more information on this research see: Preparation and photocatalytic performance of ZrO2 nanotubes fabricated with anodization process. Applied Surface Science, 2014;307():407-413. Applied Surface Science can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier - www.elsevier.com; Applied Surface Science - www.elsevier.com/wps/product/cws_home/505669)

Our news journalists report that additional information may be obtained by contacting W. Jiang, Sichuan University, Coll Chem Engn, Multiphase Mass Transfer & React Engn Lab, Chengdu 610065, People's Republic of China. Additional authors for this research include J. He, J.M. Zhong, J.Y. Lu, S.J. Yuan and B. Liang (see also Nanotubes).

Keywords for this news article include: Asia, Chengdu, Photocatalyst, Nanotechnology, Photocatalytic, Emerging Technologies, People's Republic of China

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Science Letter


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