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һƪºÜÓÐÓõĺϳɽðÊôÑõ»¯ÎïÄÉÃ×ÏߺÍÄÉÃ׿ײÄÁϵÄÎÄÏ×,ÈçCo3O4µÈ.
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×÷Õß·¢±íÁËһƪÀûÓúܼòµ¥µÄË®ÈȺó´¦ÀíµÄ°ì·¨Çå³ýSBA-15 ±íÃæÎ¢¿×µÄÎÄÕÂ,¾¡¹ÜÎÄÕµÄÓ°ÏìÒò×Ó²»¸ß,µ«ÊÇÀûÓøòÄÁÏ×÷ΪӲģ°å,¿ÉÒÔÓÐЧºÏ³Éά¶È¿É¿ØµÄ½ðÊôÑõ»¯Îï²ÄÁÏ,Èç½é¿×Co3O4 »òCo3O4 ÄÉÃ×ÏßµÈ. 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¨Cmigration¨Cdeposition 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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