Synthesis and characterization of TiO₂/Fe₂O₃ core–shell nanocomposition film and their photoelectrochemical property

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• 作者：Hui Zhao^a ; Wuyou Fu ; ^a ; ^{fuwy56@163.com"" rel=""nofollow} ; Haibin Yang^a ; Yang Xu^a ; Wenyan Zhao^a ; Yanyan Zhang^a ; Hui Chen^a ; Qiang Jing^a ; Xuefeng Qi^a ; Jing Cao^a ; Xiaoming Zhou^a ; Yixing Li^a
• 关键词：TiO₂ nanorod array ; Fe₂O₃ ; Nanocomposition film ; Photoelectrochemical property
• 刊名：Applied Surface Science
• 出版年：2011
• 出版时间：15 August 2011
• 年：2011
• 卷：257
• 期：21
• 页码：8778-8783
• 全文大小：1003 K

文摘

TiO₂/Fe₂O₃ core–shell nanocomposition film has been fabricated via two-step method. TiO₂ nanorod arrays are synthesized by a facile hydrothermal method, and followed by Fe₂O₃ nanoparticles deposited on TiO₂ nanorod arrays through an ordinary chemical bath deposition. The phase structures, morphologies, particle size, chemical compositions of the composites have been characterized by X-ray diffraction (XRD), field emission scanning electron microscope (FESEM) and ultraviolet–visible (UV–vis) spectrophotometer. The results confirm that Fe₂O₃ nanoparticles of mean size ca. 10 nm coated on the surface of TiO2 NRs. After depositing Fe₂O₃, UV–vis absorption property is induces the shift to the visible-light range, the annealing temperature of 600 °C is the best condition for UV–vis absorption property of TiO₂/Fe₂O₃ nanocomposite film, and increasing Fe content, optical activity are enhanced one by one. The photoelectrochemical (PEC) performances of the as-prepared composite nanorods are determined by measuring the photo-generated currents under illumination of UV–vis light. The TiO₂ NRs modified by Fe₂O₃ show the photocurrent value of 1.36 mA/cm² at 0 V vs Ag/AgCl, which is higher than those of unmodified TiO₂ NRs.