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Hydrothermal preparation of hierarchical ZIF-L nanostructures for enhanced CO2 capture

Author:
Ding, Bing, Wang, Xianbiao, Xu, Yongfei, Feng, Shaojie, Ding, Yi, Pan, Yang, Xu, Weifan, Wang, Huanting
Source:
Journal of colloid and interface science 2018 v.519 pp. 38-43
ISSN:
0021-9797
Subject:
adsorption, carbon dioxide, hot water treatment, nanomaterials, surface area, temperature
Abstract:
A zeolitic imidazolate framework (ZIF-L) with hierarchical morphology was synthesized through hydrothermal method. The hierarchical product consists of ZIF-L leaves with length of several micrometers, width of 1 ∼ 2 μm and thickness of ∼300 nm cross connected symmetrically. It was found that the hydrothermal temperature is crucial for the formation of such hierarchical nanostructure. The formation mechanism was investigated to be a secondary crystal growth process. The hierarchical ZIF-L has larger surface area compared with the two-dimensional (2D) ZIF-L leaves. Subsequently, the hierarchical ZIF-L exhibited enhanced CO2 adsorption capacity (1.56 mmol·g−1) as compared with that of the reported two-dimensional ZIF-L leaves (0.94 mmol·g−1). This work not only reveals a new strategy for the formation of hierarchical ZIF-L nanostructures, but also supplies a potential material for CO2 capture.
Agid:
6288833