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论文类型：期刊论文

发表时间：2009-05-01

发表刊物：ACTA MATERIALIA

收录刊物：SCIE

卷号：57

期号：9

页面范围：2684-2690

ISSN号：1359-6454

关键字：ZnFe2O4; Nanotube; Template synthesis; Photovoltaic properties; Quantum confinement effects

摘要：Highly ordered ZnFe2O4 nanotube arrays were successfully prepared using porous anodic aluminum oxide (AAO) template from sol-gel Solution. The ZnFe2O4 nanotubes are orderly arranged in parallel and each nanotube is composed of many agglutinating nanoparticles. The UV-vis absorption and surface photovoltage spectra of the ZnFe2O4 nanotubes and gel powders have been compared. The photovoltaic response threshold of the ZnFe2O4 nanotubes exhibited a blue-shift of about 150 nm with respect to that of the ZnFe2O4 gel powder, which implies that the photogenerated charges in the nanotubes have a higher redox activity than that of the gel powder. Both materials behave like a p-type semiconductor with photogenerated electrons accumulated at their surface. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.