Hydrophilic swellable metal–organic framework encapsulated Pd nanoparticles as an efficient catalyst for Cr( vi ) reduction

Controllable integration of metallic nanoparticles and metal-organic frameworks (MOFs) may create a new material with multifunctional applications. In this work, an emerging type of core-shell nanostructure, in which metallic Pd nanoparticle cores were encapsulated by MOF (ZIF-67) shells, was facile...

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Bibliographic Details
Published in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2016-01, Vol.4 (30), p.11680-11687
Main Authors: Li, Hong-Chao, Liu, Wu-Jun, Han, He-Xing, Yu, Han-Qing
Format: Article
Language:English
Subjects:
Catalysts
Durability
Encapsulation
Metal-organic frameworks
Nanoparticles
Nanostructure
Palladium
Reduction
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Summary:Controllable integration of metallic nanoparticles and metal-organic frameworks (MOFs) may create a new material with multifunctional applications. In this work, an emerging type of core-shell nanostructure, in which metallic Pd nanoparticle cores were encapsulated by MOF (ZIF-67) shells, was facilely synthesized through an impregnation-reduction process. The as-synthesized Pd[at]ZIF-67 material, with highly dispersed Pd nanoparticles encapsulated in the porous ZIF-67 structure, exhibited favorable catalytic performance towards the formic acid (HCOOH)-induced reduction of highly toxic hexavalent chromium (Cr(vi)). In this process Cr(vi) was converted to Cr(iii) within 5 min, and the material could be reused 10 times without significant loss of its catalytic activity. The highly hydrophilic and swellable nature of the ZIF-67 was proposed to be responsible mainly for the favorable durability of the Pd[at]ZIF-67. The results provided in this work may pave a way for the concise preparation of nano-hybrid catalysts with high performance and durability for pollutant elimination.
ISSN:2050-7488
2050-7496
DOI:10.1039/c6ta03688k