PKU系列微孔硼铝酸盐的合成、晶体结构、金属掺杂与催化性质研究

项目名称： PKU系列微孔硼铝酸盐的合成、晶体结构、金属掺杂与催化性质研究

项目编号： No.91222106

项目类型： 重大研究计划

立项/批准年度： 2013

项目学科： 无机化学

项目作者： 杨韬

作者单位： 重庆大学

项目金额： 70万元

中文摘要： 微孔分子筛材料由于其丰富多样的拓扑结构和微孔性，被广泛应用于吸附、离子交换和非均相催化等领域。常见的微孔分子筛是以SiO4、PO4、GeO4、AlO4等四面体为主要构成单元，本项目研究以AlO6八面体为主的微孔骨架，即PKU系列的硼铝酸盐。PKU-1，2，5是北京大学先期研究并发表的化合物，文献中对于其催化性能研究相当匮乏。这个体系的特殊之处在于其微孔骨架构成单元主要为AlO6八面体，因此我们可以对其进行非Al金属离子掺杂。我们初步研究PKU-1掺杂Fe3+、Cr3+分别可达到35%和18%。本项目计划对PKU-1，2，5进行离子掺杂研究，包括合成条件摸索，晶体结构细节变化研究，以及催化性能的系统表征。对于PKU-3，合作人进行了初步的结构框架搭建，发现其具有12元环孔道结构。我们计划进行系统的合成研究，期望获得单晶样品，并进行可能的金属离子掺杂和催化性能研究。

中文关键词： 微孔材料；硼酸盐；离子掺杂；结构性能关系；催化性能

英文摘要： Microporous materials have been widely used for chemical absorptions, ionic exchanges, heterocatalysis, et al due to their abundant topological structures and microporousity. Usually microporous materials are consisted of tetrahedra, like SiO4, PO4, GeO4 and AlO4, while our project focuses on PKU-series aluminoborates, whose open frameworks are mainly built of AlO6 octahedra. PKU-1 and 2 were first synthesized and published by a research group in Peking University, however the catalytic properties were almost not investigated. As mentioned, the main frameworks are built of octahedra, which is the particularity of these compounds, therefore, non-Al cations could be substituted into the frameworks easily, for example, the doping of Fe3+ and Cr3+ are as high as 35 % and 18 %, respectively. Our project will systematically investigated the cationic substitutions of PKU-1, 2 and 5, including the synthesis conditions, structural details and catalytic properties after substitutions. For PKU-3, our collaborators have been determined its framework, which possesses 12-membered-ring channels. We plan to study its synthesis conditions for single-crystal growth, and also the possible cationic substitutions with promising catalytic properties.

英文关键词： microporous materials；borates；cationic substitutions；structure-property relationship；catalytic properties