Steam-assisted synthesis of zeolite films from spin-coated zeolite precursor coatings
Steam-assisted synthesis of zeolite films from spin-coated zeolite precursor coatings
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DOI：
10.1039/b801812j
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发表时间：
2008-07
影响因子：
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通讯作者：
Lik H. Wee;L. Tosheva;L. Itani;V. Valtchev;A. Doyle
中科院分区：
文献类型：
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作者：
Lik H. Wee;L. Tosheva;L. Itani;V. Valtchev;A. Doyle
通过蒸汽辅助结晶方法，用不同醇（甲醇、乙醇、2-丙醇和1-丁醇）稀释的沸石前驱体溶液在不同载体（硅、玻璃和不锈钢）上合成了光滑均匀的Silicalite-1薄膜。使用旋涂技术制备前体薄膜产生了均匀的涂层。该方法只需要有限量的 SDA，并且形成的废物量可以忽略不计（< 0.2 g）。用于薄膜制备的醇类型显着影响晶体形态、薄膜厚度和取向。经过 3 天的汽蒸后，用甲醇稀释的前体溶液合成了优先 b 取向的 Silicalite-1 薄膜。用 2-丙醇稀释的前体溶液制备厚度为 800 nm 的薄而均匀的 Silicalite-1 薄膜。还观察到载体的类型影响薄膜形态，因为发现含二氧化硅的载体参与结晶过程。蒸煮后的 Silicalite-1 薄膜机械稳定，在煅烧和超声波处理后，SEM 分析中未观察到薄膜脱落。
Smooth and homogeneous Silicalite-1 films were synthesized on different supports (silicon, glass and stainless steel) by a steam-assisted crystallization method from zeolite precursor solutions diluted with different alcohols (methanol, ethanol, 2-propanol and 1-butanol). The use of the spin-coating technique for the preparation of the precursor films produced uniform coatings. Only a limited amount of SDA was required, and negligible amounts of waste products were formed (< 0.2 g) in the method. The type of alcohols used for film preparation significantly influenced the crystal morphology, film thickness and orientation. Preferentially b-oriented Silicalite-1 films were synthesized from a methanol-diluted precursor solution after 3 days of steaming. Thin and homogeneous Silicalite-1 films with a thickness of 800 nm were prepared from a 2-propanol-diluted precursor solution. It was also observed that the type of support affects the film morphology as the silica-containing supports were found to take part in the crystallization process. The steamed Silicalite-1 films were mechanically stable as no film detachment was observed under SEM analysis after both calcination and ultrasonic treatment.