In situ steam-assisted method for one-step synthesis of hierarchically porous Cu-BTC
Metal-organic framework(MOF)have shown great application potential in gas adsorption separation,catalysis,sensing and biomedicine due to their advantages such as large specific surface area,high porosity and highly adjustable structure.However,the pore structure of most MOF falls within the micropore range,and the narrow pore environment limits mass transfer diffusion and active site release during their application.Constructing hierarchical pores based on the microporous MOF structure can address this issue.To achieve hierarchically porous construction within the classic Cu-BTC structure,a novel single-step method combining in situ steam-assisted synthesis and etching was devised.Fine-tuning parameters such as the quantity of eco-friendly etchant acetic acid and steam assist duration yielded hierarchically porous Cu-BTC with customizable pore size ranges.Capitalizing on the enhanced mass transfer and active site accessibility conferred by the hierarchical pore architecture,the material demonstrated outstanding conversion efficiency in CO2 electroreduction experiments,culminating in a remarkable 157％increase in ethylene selectivity.Integrating material preparation and etching procedures through steam-assisted techniques enables streamlined fabrication of hierarchical porous MOF in a single step.This approach not only reduces reactant consumption and simplifies reaction steps but also propels the advancement of hierarchical porous MOF in practical applications.
万方数据
维普
