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Nanostructured composite TiO_2/carbon catalysts of high activity for dehydration of n-butanol

机译：高活性的正丁醇脱水纳米复合TiO_2 /碳催化剂

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摘要

A novel method of wood impregnation with titanium ions is presented. Titanium(Ⅳ) ions were complexed to peroxo/hydroxo complexes which were obtained by treating a TiCl_4 water solution with H_2O_2. The solution of chelated titanium ions was used for the impregnation of living stems of Salix viminalis wood. Saturated stems were carbonized at 600-800 ℃, yielding a microporous carbon matrix, in which nanoparticles of TiO_2 were uniformly distributed. A series of composite TiO_2-carbon catalysts was manufactured and tested in the process of n-butanol conversion to butane-1. The composite catalysts exhibited very high selectivity (ca. 80%) and yield (ca. 30%) despite a low content of titanium (ca. 0.5% atomic). The research proved that the proposed functionalization led to high dispersion of the catalytic phase (TiO_2), which played a crucial role in the catalyst performance. High dispersion of TiO_2 was achieved due to a natural transport of complexed titanium ions in living plant stems.
机译：提出了一种用钛离子浸渍木材的新方法。钛（Ⅳ）离子与过氧/氢氧配合物络合，后者是通过用H_2O_2处理TiCl_4水溶液而获得的。螯合钛离子溶液用于浸渍柳柳木材的活茎。饱和茎在600-800℃下碳化，得到微孔碳基质，其中TiO_2纳米颗粒均匀分布。在正丁醇转化为丁烷-1的过程中，制造并测试了一系列复合TiO_2-碳催化剂。尽管钛含量低（约0.5％原子），该复合催化剂仍具有很高的选择性（约80％）和产率（约30％）。研究证明，所提出的功能化导致了催化相（TiO_2）的高度分散，这对催化剂的性能起着至关重要的作用。由于络合钛离子在活植物茎中的自然运输，实现了TiO_2的高分散。

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