Facile fabrication of nanoscale hierarchical porous zeolitic imidazolate frameworks for enhanced toluene adsorption capacity

• 作者: Min-Hui Yang Chong-Xiong Duan Xin-Juan Zeng Jing-Jing Li Cui-Yin Liu Long-Jiao Zeng Yi Zhang Kai Wang Hong-Xia Xi
• 来源期刊: 稀有金属（英文版）
• 年，卷（期）: 2021,（2）
• 所属期刊栏目: ADVANCED MOF-BASED MATERIALS FOR ENERGY CONVERSION AND STORAGE
• 页码范围: 471-477
• 页数: 7页
• 语种: 英文

摘要

The development of a simple and facile synthesis route is a highly desirable but challenging process in the fabrication of nanoscale hierarchical porous zeolitic imidazolate frameworks (ZIFs).Herein we describe a facile method for rapidly synthesizing hierarchically porous ZIF-90 nanocrystals (particle sizes of ～ 300 nm) using hydroxyl double salts as intermediates at room temperature.The as-synthesized ZIF-90 contained hierarchical porous structures developed using a crystalline interior and a random stack of multiple nanoparticles.Both the morphology and particle size of ZIF-90 nanocrystals could be tuned by controlling the molar ratio of ICA/Zn2+.Note that the as-synthesized hierarchically porous ZIF-90 nanocrystals exhibited higher thermal stability compared with the conventional ZIF-90.Because of the introduction of hierarchical porous structures,the resultant hierarchically porous ZIF-90 nanocrystals showed enhanced toluene adsorption capacity than those of conventional metal organic frameworks and zeolites.