Synthesis of SiC–TiO2 hybrid aerogel via supercritical drying combined PDCs route
Synthesis of SiC–TiO2 hybrid aerogel via supercritical drying combined PDCs route
复制标题
超临界干燥联合PDCs路线合成SiC-TiO2杂化气凝胶
DOI：
10.1016/j.ceramint.2016.07.213
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发表时间：
2016-11
影响因子：
5.2
通讯作者：
李家东
中科院分区：
文献类型：
--
作者：
褚鹏;刘洪丽;李亚静;张海媛;李家东
The SiC-TiO2hybrid aerogels were obtained from polycarbosilane (PCS) and tetrabutyltitanate (TBT) as precursors using supercritical drying and polymer derived ceramics route. The polymer to ceramic conversion and the crystallization behavior were studied by X-ray diffraction (XRD) and transmission electron microscopy (TEM), suggesting the preceramic aerogels converted to the SiC-TiO2ceramic aerogels through pyrolysis process at different temperatures. At 1200 °C, the ceramic aerogels were homogeneous with well-distributed element components, composed of rutile TiO2and the β-SiC crystalline phases. The results show that the SiC-TiO2ceramic aerogels with netwoks structure have 23.36 nm average pore size, high surface area (58 m2/g) and pore volume (0.22 cm3/g).
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