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- W2560738045 abstract "Well-defined pyrite FeS2 microcubes and micro-octahedra with high-yield and good uniformity weresuccessfully synthesized by a convenient and simple polymer-assisted hydrothermal method.Employing S as sulfur source and FeCl2$4H2O as the precursor in the presence of polyvinylpyrrolidone(PVP) and polyvinyl alcohol (PVA), cube-shaped and octahedron-shaped pyrite FeS2 crystallites weresuccessfully obtained by simply adjusting the NaOH concentration, and the size of the product can bereadily tuned by varying the reaction parameters. The effects of various NaOH concentrations and thepolymer dosage on the morphology evolution process were investigated systematically. The phasecomposition, morphology, structure, and properties of the as-obtained products were studied by X-raydiffraction, field emission scanning electron microscopy, (high-resolution) transmission electronmicroscopy, Fourier transform-infrared spectroscopy, X-ray photoelectron spectrometry, and UV-Visspectrometry. It was found that besides the capping effect of the polymer reagents, the ‘‘synergisticeffect’’ or ‘‘cooperative effect’’ between the PVA and the PVP also played a crucial role in directing thegrowth of the FeS2 crystallites. The possible formation mechanism of the FeS2 phase and morphologywas tentatively proposed based on a series of contrast experiments. Moreover, the optical propertieswere also preliminarily studied. Thismethod can be easily controlled and is expected to be extendable tothe fabrication of other metal chalcogenides with controlled shape and structure." @default.
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- W2560738045 date "2010-01-01" @default.
- W2560738045 modified "2023-09-24" @default.
- W2560738045 title "Shape controlled growth of pyrite FeS2 crystallites via a polymer-assisted hydrothermal route" @default.
- W2560738045 hasPublicationYear "2010" @default.
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