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Abstract: Uniform copper hydroxyphosphate quadrangle star-like microcrystals with tunable size and microprism bundles have been achieved through a simple hydrothermal method. Reactions are conducted in a water system using CuSO4, NH4H2PO4 and NaOH as reactants without adding any surfactants. Structures and morphologies of the products were characterized by powder X-ray diffraction, scanning electron microscopy, fourier transform infrared spectrometry, and UV–vis spectrometry. It was found that the size and morphology of the products depended strongly on the concentration and the molar ratio of the starting reagents. The possible mechanism of the products was discussed and the size dependent photocatalytic property of the products was investigated. [Copyright &y& Elsevier]

Abstract: Uniform hematite nanoparticles have been successfully synthesized through a surfactant mediated hydrothermal method. The structure and morphology of the products were characterized by powder X-ray diffraction, transmission electron microscope, scanning electron microscope, and Fourier transform infrared spectrometer. The results showed that the products were α-Fe2O3 nanoellipsoids of 115–140nm in long axis and 60–80nm in short axis. The growth mechanism of the products was proposed based on the experiments. Uniform nanospindles, nanoellipsoids, nanospheres, and nanopolyhedra with different sizes can be obtained by adjusting the reaction temperature, the amount of additive, and concentration of the reactants. The result may facilitate the exploration of controlled synthesis of α-Fe2O3 nanoparticles. [Copyright &y& Elsevier]

Abstract: Various ZnO architectures like novel flowerlike structures radially assembled by rods, nails or towers and novel radialized bundled tubular structures with diverse diameter in entire length were controllably synthesized with different amine precursors by a simple surfactant-free hydrothermal process. It suggests that diverse amine sources, which possibly have different hydroxyl ion releasing rate contributing to different reaction rates, probably play an importance role in controlling the assembly of different ZnO architectures, besides temperature and time. X-ray powder diffraction (XRD) results prove the ZnO belonging to wurtzite structure and room temperature photoluminescence (PL) demonstrates a high quality of the products. [Copyright &y& Elsevier]