Water-Based Synthesis of Zr6-Based Metal–Organic Framework Nanocrystals with Sulfonate Functions: Structural Features and Application to Fructose Dehydration - Université de Lille Accéder directement au contenu
Article Dans Une Revue ACS Applied Nano Materials Année : 2022

Water-Based Synthesis of Zr6-Based Metal–Organic Framework Nanocrystals with Sulfonate Functions: Structural Features and Application to Fructose Dehydration

Résumé

A series of zirconium-based metal−organic framework (MOF) nanocrystals (95−211 nm) displaying sulfonate functions (UiO-66-SO3H) was prepared in N,N-dimethylformamide (DMF) - the conventional solvent - and water, and their physicochemical properties were thoroughly investigated. In particular, X-ray diffraction results suggest that upon replacing DMF with water, the resulting MOF crystal structure presents a highly defective structure belonging to the space group Im3̅ instead of typical Fm3̅m. The acid catalysts were applied to the fructose dehydration into 5-hydroxymethylfurfural (5-HMF). Complete conversion of fructose over UiO-66-SO3H prepared in water was reached after only 30 min at 100 °C, in line with its stronger Brønsted acidity. In comparison, its counterpart prepared in DMF showed only 30% fructose conversion. Moreover, the intrinsic catalytic effect at 80 °C was only observed with the water-based UiO66-SO3H. Without reactivation of the catalyst, recycling tests demonstrated the preservation of its structural integrity upon nine consecutive cycles, while a gradual loss of the catalyst activity was attributed to the humin adsorption on the MOFs.

Domaines

Catalyse
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Dates et versions

hal-03794329 , version 1 (03-10-2022)

Identifiants

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Bakytzhan Yeskendir, Priscilla Magalhaes de Souza, Pardis Simon, Robert Wojcieszak, Christian Courtois, et al.. Water-Based Synthesis of Zr6-Based Metal–Organic Framework Nanocrystals with Sulfonate Functions: Structural Features and Application to Fructose Dehydration. ACS Applied Nano Materials, 2022, ACS Applied Nano Materials, ⟨10.1021/acsanm.2c02916⟩. ⟨hal-03794329⟩
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