Development of hydrothermal stability of mesoporous material

如下制备用于合成介孔材料的起始混合物。 在A溶液的制备中，将20.837 g TEOS溶解在4 ml去离子水和HCl中。 搅拌30分钟后，加入HCl。 在B溶液的制备中，将7.2 g Puronic P123溶解在10 ml去离子水和10 ml乙醇中。 搅拌30分钟后，加入HCl。 将溶液A和B与20 ml水和20 ml乙醇混合（溶液C）。 将15 ml溶液C和5 ml聚乙烯醇溶液混合作为浸涂溶液。 使用α-Al 2 O3多孔管作为基底。 浸渍后，使用真空泵在真空干燥器中快速干燥膜。 然后在1073 K下煅烧2 h。 用毛细管凝聚法测定了孔径分布。 孔由三嵌段共聚物的消失（1.8nm）和多孔载体上的孔的修饰（12 nm）组成。

The starting mixture for synthesizing the mesoporous materials was prepared as follows. In preparation of A solution, 20.837 g of TEOS was dissolved in 4 ml of deionized water and HCl. After stirring 30 min, HCl was added. In preparation of B solution, 7.2 g of Puronic P123 was dissolved in 10 ml of deionized water and 10 ml of ethanol. After stirring 30 min, HCl was added. The A and B solutions were mixed with 20 ml of water and 20 ml of ethanol (solution C). The 15 ml of solution C and 5 ml of polyvinyl alcohol solution were mixed as a dip-coating solution. An alpha-Al2O3 porous tubular was used as the substrate. After dipping, the membrane was rapidly dried in vacuum desiccator using a vacuum pump. It was then calcined at 1073 K for 2 h. The pore size distribution was evaluated by capillary condensed method. The pores was consisted of the disappearance of tri-block copolymer (1.8 nm) and the modification of pores on porous support (12 nm).