【摘要】：采用水熱合成法,通過調(diào)節(jié)合成液配比,合成出粒徑均一且形貌規(guī)則的TS-1分子篩晶粒;選擇粒徑為1.2μm×0.9μm×0.4μm的棺狀TS-1分子篩晶粒作為晶種,利用Langmuir Blodgett(LB)技術(shù),在不銹鋼載體表面組裝得到厘米尺度排列緊密且呈高度b-軸取向的TS-1分子篩晶種層;分別采用合成液加入碳酸銨法和合成液預(yù)晶化法,抑制二次生長過程中孿晶的生成,獲得取向的TS-1分子篩膜。結(jié)果表明:采用合成液加入碳酸銨法,不能制備高度b-軸取向的TS-1分子篩膜;采用合成液預(yù)晶化法,在170℃生長6 h即可制備連續(xù)致密且高度b-軸取向的TS-1分子篩膜,其b-軸晶體優(yōu)先取向值(CPO(0k0))高達(dá)0.884,且紫外漫反射光譜結(jié)果證實所得TS-1分子篩膜具有較高的骨架鈦含量。因此,利用LB法可制備骨架鈦含量高、連續(xù)致密且高度b-軸取向的TS-1分子篩膜。
[Abstract]:TS-1 molecular sieve grains with uniform particle size and regular morphology were synthesized by hydrothermal synthesis method, and the grain size of TS-1 molecular sieve with diameter 1.2 渭 m 脳 0.9 渭 m 脳 0.4 渭 m was chosen as seed, and Langmuir Blodgett (LB) technique was used. The TS-1 molecular sieve seed layer with compact arrangement in centimeter scale and high b-axis orientation was obtained on the surface of stainless steel, and the twin formation was inhibited by adding ammonium carbonate into the synthetic solution and pre-crystallization of the synthetic solution, respectively, in the secondary growth process. The oriented TS-1 molecular sieve membrane was obtained. The results showed that the highly baxially oriented TS-1 molecular sieve membranes could not be prepared by adding ammonium carbonate into the synthetic solution, and the continuous dense and highly baxially oriented TS-1 molecular sieve membranes could be prepared by the synthetic liquid pre-crystallization method at 170 鈩，

本文編號：2271832