Controllable Synthesis, Magnetic Properties, and Enhanced Photocatalytic Activity of Spindlelike Mesoporous 伪-Fe2O3/ZnO Core鈥揝hell Heterostructures

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• 作者：Wei Wu ; Shaofeng Zhang ; Xiangheng Xiao ; Juan Zhou ; Feng Ren ; Lingling Sun ; Changzhong Jiang
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2012
• 出版时间：July 25, 2012
• 年：2012
• 卷：4
• 期：7
• 页码：3602-3609
• 全文大小：602K
• 年卷期：v.4,no.7(July 25, 2012)
• ISSN：1944-8252

文摘

Mesoporous spindlelike iron oxide/ZnO core鈥搒hell heterostructures are successfully fabricated by a low-cost, surfactant-free, and environmentally friendly seed-mediate strategy with the help of postannealing treatment. The material composition and stoichiometry, as well as these magnetic and optical properties, have been examined and verified by means of high-resolution transmission electron microscopy and X-ray diffraction, the thickness of ZnO layer can be simply tailored by the concentration of zinc precursor. Considering that both 伪-Fe₂O₃ and ZnO are good photocatalytic materials, we have investigated the photodegradation performances of the core鈥搒hell heterostructures using organic dyes Rhodamin B (RhB). It is interesting to find that the as-obtained iron oxides/ZnO core鈥搒hell heterostructures exhibited enhanced visible light or UV photocatalytic abilities, remarkably superior to the as-used 伪-Fe₂O₃ seeds and commercial TiO₂ products (P25), mainly owing to the synergistic effect between the narrow and wide bandgap semiconductors and effective electron鈥揾ole separation at the interfaces of iron oxides/ZnO.

Keywords:

mesoporous structure; heterostructure; magnetic properties; photocatalyst; semiconductors