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一篇很有用的合成金属氧化物纳米线和纳米孔材料的文献,如Co3O4等.
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作者发表了一篇利用很简单的水热后处理的办法清除SBA-15 表面微孔的文章,尽管文章的影响因子不高,但是利用该材料作为硬模板,可以有效合成维度可控的金属氧化物材料,如介孔Co3O4 或Co3O4 纳米线等. Title:Tailoring porosity and dimensionality of Co3O4 nanophase using channel interconnectivity control by steaming of nanocasting SBA-15 Abstract:Two-dimensional hexagonal arrays of interconnected Co3O4 nano-rods or disconnected mono-dimensional Co3O4 nano-rods were nano-cast fabricated using SBA-15 as hard template with or without intra-wall microporosity, respectively. A clean, efficient and facile high temperature steam post-treatment is proposed to control the microporosity and the interconnectivity of the nanocasted oxide phase. Characterization by small-angle X-ray diffraction (XRD), nitrogen adsorption, scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HRTEM) suggests that the selective removal of micropores is resulted from hydrothermal restructuring within the pore wall of calcined SBA-15 followed by a sequential process, including hydrolysis and re-condensation of internal surface siloxane bonds and dissolution–migration–deposition of amorphous debris external onto the SBA-15 under the atmosphere of pure water vapor. -------------------------------------------------------------------------------- Link: http://www.sciencedirect.com/sci ... i/S1387181114004776 |
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2014-09-18 16:42:23, 2.32 M
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2014-09-19 06:53
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