Core–shell zeolite Y with ant-nest like hollow interior constructed by amino acids and enhanced catalytic activity,Journal of Materials Chemistry A

当前位置： X-MOL 学术 › J. Mater. Chem. A › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Core–shell zeolite Y with ant-nest like hollow interior constructed by amino acids and enhanced catalytic activity
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2017-09-04 00:00:00 , DOI: 10.1039/c7ta05048h
Jian Zhang _{1,

2,

3,

4,

5} , Shan Bai _{1,

2,

3,

4,

5} , Zhuwen Chen _{1,

2,

3,

4,

5} , Yanding Wang _{1,

2,

3,

4,

5} , Lei Dong _{1,

2,

3,

4,

5} , Hairong Zheng _{4,

6,

7,

8,

9} , Feiyan Cai _{4,

6,

7,

8,

9} , Mei Hong _{1,

2,

3,

4,

5}

Affiliation

Core–shell zeolite Y containing an ant-nest like hollow interior has been synthesized in the presence of natural amino acids. Time-resolved characterization of zeolite samples revealed the gradual development of three-dimensionally interconnected mesoporous channels via an intermediate stage of spatially aligned cavities in the core, which did not follow either a classical or a reversed crystal growth route. Comparative experiments suggested coordinative construction actions of amino acids, the interpenetration of which into the internal weak points of the aluminosilicate framework takes place simultaneously with zeolite crystallization. At the point of complete zeolite growth, amino acids in aggregated domains begin disassembling the zeolite interior forming a network of channels while maintaining the external zeolite shell thickness of 165 nm and morphologically similar to conventional faujasite. The core–shell zeolite Y samples exhibit superior crystallinity and enhanced catalytic activity for Friedel–Crafts benzylation of toluene.

中文翻译：

核壳型沸石Y具有类似蚁巢的中空内部结构，由氨基酸构成，并具有增强的催化活性

在天然氨基酸的存在下，合成了含有蚁巢样空心内部的核壳型沸石Y。沸石样品的时间分辨特征显示的三维连通孔道的逐步发展经芯中空间排列的空腔的中间阶段，既没有遵循经典的晶体生长路线，也没有遵循相反的晶体生长路线。比较实验表明，氨基酸的协调结构作用，其互渗到铝硅酸盐骨架的内部弱点中与沸石结晶同时发生。在沸石完全生长时，聚集域中的氨基酸开始分解沸石内部，形成通道网络，同时保持沸石外部壳的厚度为165 nm，并且形态上类似于常规八面沸石。核-壳型沸石Y样品具有优异的结晶度，并且对甲苯的Friedel-Crafts苄基化反应具有增强的催化活性。

更新日期：2017-09-25

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11