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利用活化处理后的三叶草叶茎为模板,将模板浸渍于硝酸铈溶液中,经水热反应在叶茎细胞的外表面及叶茎管状结构的内外层实现铈盐颗粒的预组装,经过500℃煅烧去除叶茎模板制得具有仿生形态多孔结构的氧化铈。研究了叶茎与硝酸铈的质量比和水热反应温度对多孔氧化铈微观结构的影响。利用热重分析仪、场发射扫描电子显微镜、X射线衍射仪和红外光谱仪对样品进行表征。结果表明:当叶茎与铈盐的质量比为2:1和水热反应温度为80℃时,所得氧化铈具有纤维管状的仿生多孔结构,其长度为数十至数百微米、直径为数十纳米至十多微米。实现了无机氧化铈材料对叶茎模板三维立体多孔结构的精密仿生复制。
The activated carbon clover leaf was used as template to digest the template in ceric nitrate solution. The hydrothermal reaction was used to pre-assemble the cerium salt particles on the outer surface of the stem cells and the inner and outer layers of the tubular structure of the leaf stem. After 500 ℃ Calcination to remove the leaf stem template to obtain a porous structure with a bionic morphology of cerium oxide. The effects of mass ratio of leaf stem to cerium nitrate and hydrothermal reaction temperature on the microstructure of porous cerium oxide were studied. The samples were characterized by thermogravimetry, field emission scanning electron microscopy, X-ray diffraction and infrared spectroscopy. The results show that when the mass ratio of leaf stem to cerium salt is 2: 1 and the hydrothermal reaction temperature is 80 ℃, the obtained cerium oxide has a fibrous tubular bionic porous structure with a length of several tens to several hundreds of micrometers and a diameter of several Ten nanometers to ten microns. The precise bionic reproduction of the three-dimensional porous structure of the leaf stem template by the inorganic ceria material has been achieved.