Dept. of Chemistry and Physics of Materials, Paris-Lodron-University of Salzburg, Jakob-Haringer-Straße 2a, 5020, Salzburg, Austria.
Institute of Physics, Montanuniversitaet Leoben, Franz-Josef Straße 18, 8700, Leoben, Austria.
Chempluschem. 2021 Feb;86(2):275-283. doi: 10.1002/cplu.202000740.
Sol-gel processing combined with soft templating and gelation-induced phase separation is very sensitive to the precursor sol composition. In this work we present a straightforward synthesis towards hierarchically structured, macroporous carbon/titania monoliths with ordered mesopores derived from resorcinol/formaldehyde monoliths and a glycolated titanium precursor. We demonstrate the influence of various reaction solvents, where diol-based media and the proportion of the catalyst seem to be essential in controlling spinodal decomposition, obtaining similar monolithic structures under different synthesis conditions. Based on these observations, we further homogeneously incorporated TiO into the carbon structure by an in situ synthesis approach, obtaining structural features similar to pure carbon materials with surface areas of about 400 m g , periodically arranged mesopores with a mean distance of 10-11 nm and cellular macroporosity.
溶胶-凝胶法结合软模板法和凝胶诱导相分离对前驱体溶胶组成非常敏感。在这项工作中，我们提出了一种简单的合成方法，用于制备具有有序介孔的分层结构的大孔碳/二氧化钛整体材料，这些介孔是由均苯三酚/甲醛整体材料和乙二醇化钛前驱体制备的。我们研究了不同反应溶剂的影响，其中二醇基介质和催化剂的比例对于控制旋节分解非常重要，可以在不同的合成条件下获得相似的整体结构。基于这些观察结果，我们进一步通过原位合成方法将 TiO 均匀地掺入到碳结构中，获得了与纯碳材料相似的结构特征，比表面积约为 400 m 2 /g，周期性排列的介孔平均距离为 10-11nm，具有细胞状大孔。
