Metal-organic frameworks (MOFs) are well known for their high porosity, tunable pore structures or their exceptional gas sorption properties, making them promising candidates for a variety of applications. Nevertheless, their integration into practical applications faces challenges, particularly in terms of immobilization on substrates (shaping). This study introduces an innovative approach for the direct growth of MOFs on a geopolymer support, a class of amorphous aluminosilicate materials known for their excellent mechanical strength and chemical stability. The direct growth method of the well-known MOF, based on Zr, Al and Cu respectively named UiO-66, MIL-53 and HKUST-1, has been developed and the final material has been evaluated for gas sorption, notably N 2 O, a powerful ozone-depleting gas. Our results demonstrate the feasibility and versatility of MOF-geopolymer composite, showing the way for the development of advanced adsorbent materials with tailor-made functionalities for a variety of environmental and potentially industrial applications. • Direct growth of MOFs on geopolymer surfaces creates novel GeoMOF composites • UiO-66, MIL-53, and HKUST-1 were successfully grown on geopolymer matrices. • Resulting materials feature a hierarchical macro- and microporous network. • N 2 O adsorption capacity increased by up to 114% compared to the support alone. • This method provides an efficient, scalable shaping strategy for porous materials.
Prozsa et al. (Wed,) studied this question.