论文部分内容阅读
沸石分子筛阵列或薄膜在膜分离、膜催化、化学传感器与微电子器件等领域有广泛的应用前景.原位水热合成和载体表面的晶粒自组装是制备沸石分子筛阵列和薄膜的两种主要方法,近年来受到国内外科技工作者的普遍关注,取得了很多突破性进展.对于原位水热合成法,可以通过载体表面的改性或合成条件的调控来实现沸石分子筛晶体在载体表面的定向成核、生长,最终获得单一取向的多晶沸石分子筛阵列或薄膜.对于载体表面的晶粒自组装过程,可以通过不同的结合方式将沸石分子筛晶粒组装到载体表面,实现膜层微结构的调控,制备出结构有序的沸石分子筛阵列或薄膜.对近年来国内外在沸石分子筛晶体表面定向生长和组装方面取得的重要结果进行总结与评述,内容涉及:(1)在原位水热条件下通过载体表面植入功能基团、改变载体表面微结构以及调变合成液组成等措施,获得高度取向的沸石分子筛阵列或薄膜;(2)利用共价键、离子键和分子间键作用在载体表面组装沸石分子筛晶粒,制备高度覆盖、结构有序的晶体阵列或薄膜;(3)表面组装与微接触印刷、光刻技术结合制备图案化的沸石分子筛阵列或薄膜.最后介绍了分子筛阵列和薄膜的一些功能和应用,并对沸石分子筛表面定向合成与组装研究需要进一步关注的若干问题进行了展望.
Zeolite molecular sieve arrays or thin films have wide application prospects in the fields of membrane separation, membrane catalysis, chemical sensors and microelectronic devices, etc. In-situ hydrothermal synthesis and self-assembly of the surface of the support are the two main methods for preparing zeolite arrays and thin films Method, in recent years by scientists at home and abroad widespread concern, made a lot of groundbreaking progress.For the in-situ hydrothermal synthesis method, you can modify the surface of the carrier or the synthesis conditions to achieve the control of zeolite crystals in the carrier surface Oriented nucleation and growth, and finally obtain a single orientation polycrystalline zeolite molecular sieve array or film For the self-assembly process of the grain surface of the carrier, the zeolite crystallites can be assembled onto the surface of the carrier through different combinations to achieve the film microstructure , The zeolite molecular sieve array or thin film with ordered structure has been prepared.It summarizes and comments on the important results of directional growth and assembly on zeolite zeolite crystal both at home and abroad in recent years.The content involves: (1) Under the conditions of implantation of functional groups through the carrier surface, changing the microstructure of the carrier surface and the modulation of the fluid group Into a highly oriented zeolite molecular sieve array or film; (2) the use of covalent bonds, ionic bonds and intermolecular bonds assembled zeolite zeolite particles on the surface of the carrier, the preparation of highly-covered, ordered structure of the crystal array or film ; (3) Combination of surface assembly, micro-contact printing and photolithography to prepare patterned zeolite molecular sieve array or film.Finally, some functions and applications of molecular sieve arrays and thin films are introduced, and the further research on zeolite molecular sieve surface orientation synthesis and assembly is needed A number of issues of concern were forecast.