MIL-100(Fe)/Diatomite Composite with Hierarchical Porous Structure for Sorption of Volatile Organic Compounds

• Published in: Russian Journal of Physical Chemistry A 2022, Vol.96 (1), p.171-178
• Main Authors: Evdokimova, E. V., Matskan, P. A., Mamontov, G. V.
• Format: Article
• Language: English
• Subjects: Adsorption; Chemistry; Chemistry and Materials Science; Composite materials; Composite structures; Diatomaceous earth; Low temperature; Metal-organic frameworks; Physical Chemistry; Physical Chemistry of Surface Phenomena; Porous materials; Silicon dioxide; Sorption; Structural hierarchy; Toluene; VOCs; Volatile organic compounds
• ISSN: 0036-0244; 1531-863X
• DOI: 10.1134/S0036024422010083

The synthesis of a composite material with a hierarchical porous structure based on the metal-organic framework MIL-100 and a natural silica material diatomite is proposed in the present study. The structure of the synthesized materials was characterized by a complex of physical-chemical methods (low-temperature sorption of nitrogen, XRD, TG-DSC). The hierarchical porous structure of the composite was confirmed by the low-temperature nitrogen adsorption method. The presence of MIL-100(Fe) and diatomite phases (amorphous silica and quartz) was confirmed by XRD. The composite structure is stable up to 300°C (confirmed by TG-DSC). The sorption properties of the composite were evaluated in the removal of toluene vapor. The MIL-100(Fe)/diatomite composite exhibited the high adsorption capacity for toluene (183 mg/g).