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- W2164291216 abstract "A rapid and economical route based on an efficient microwave–hydrothermal process has been developed to synthesize monodisperse α-Fe2O3 nanocrystals with continuous aspect-ratio tuning and fine shape control, which takes advantage of microwave irradiation and hydrothermal effects. This method easily programs the experimental conditions (e.g., temperature and time) and significantly shortens the synthesis time to minutes. It allows the creation of numerous recipes for optimizing and scaling up production. The effects of experimental conditions including reaction temperature and reactant concentration on the morphology of α-Fe2O3 have been investigated systematically. Results reveal that the initial molar ratio of Fe3+ to PO plays a crucial role in the final morphology of the α-Fe2O3 products. Several morphologies, which include ellipsoids/spindles with aspect ratios that range from 1.1 to 6.3, nanosheets, nanorings, and spheres can be obtained. The as-formed α-Fe2O3 exhibits shape-dependent infrared optical properties. The growth process of colloidal α-Fe2O3 crystals in the presence of phosphate ions is discussed. The products have been characterized by using X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and infrared spectroscopy. This work presents an efficient and cost-effective approach that is potentially competitive for scaling-up industrial production. The as-formed α-Fe2O3 crystals with controllable morphologies not only provide flexible building blocks for advanced functional devices, but are also ideal candidates for studying their nanoarchitecture-dependent performance in optical, catalytic, and magnetic applications." @default.
- W2164291216 created "2016-06-24" @default.
- W2164291216 creator A5064171154 @default.
- W2164291216 creator A5082740886 @default.
- W2164291216 date "2008-03-25" @default.
- W2164291216 modified "2023-09-30" @default.
- W2164291216 title "Continuous Aspect-Ratio Tuning and Fine Shape Control of Monodisperseα-Fe2O3 Nanocrystals by a Programmed Microwave–Hydrothermal Method" @default.
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