A Feasible One-Step Synthesis of Hierarchical Zeolite Beta with Uniform Nanocrystals via CTAB

Weimin Zhang; Weixing Ming; Sufang Hu; Bo Qin; Jinghong Ma; Ruifeng Li

doi:10.3390/ma11050651

A Feasible One-Step Synthesis of Hierarchical Zeolite Beta with Uniform Nanocrystals via CTAB

Materials (Basel). 2018 Apr 24;11(5):651. doi: 10.3390/ma11050651.

Authors

Weimin Zhang¹, Weixing Ming², Sufang Hu³, Bo Qin⁴, Jinghong Ma⁵, Ruifeng Li⁶

Affiliations

¹ College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China. zhangweimin_1989@126.com.
² College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China. mingweixing@163.com.
³ College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China. husufang0114@link.tyut.edu.cn.
⁴ Dalian Research Institute of Petroleum & Petrochemicals, SINOPEC, Dalian 116045, China. qinbo.fshy@sinopec.com.
⁵ College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China. majinghong@tyut.edu.cn.
⁶ College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China. rfli@tyut.edu.cn.

Abstract

A hierarchical zeolite Beta has been prepared by a feasible one-pot and one-step method, which is suitable for application in industrial production. The synthesis is a simple hydrothermal process with low-cost raw materials, without adding alcohol or adding seeds, and without aging, recrystallization, and other complex steps. The hierarchical zeolite Beta is a uniform nanocrystal (20⁻50 nm) aggregation with high external surface area (300 m²/g) and mesoporous volume (0.50 cm³/g), with the mesoporous structure composed of intercrystal and intracrystal pores. As an acid catalyst in benzylation of naphthalene with benzyl chloride, the hierarchical zeolite Beta has shown high activity in the bulky molecule reaction due to its introduction of mesostructure.

Keywords: CTAB; hierarchical zeolite; hydrothermal synthesis; naphthalene benzylation; zeolite Beta; zeolitic nanocrystals.