In situ formation of a multiporous MOF(Al)@γ-AlOOH composite material: A versatile adsorbent for both N- and S-heterocyclic fuel contaminants with high selectivity

Metal Organic Frameworks as Desulfurization Adsorbents of DBT and 4,6-DMDBT from Fuels

“…The composite presented maximum adsorption capacities with the following order: benzothiophene > dibenzothiophene > 4,6dimethyldibenzothiophene > thiophene. The main adsorption mechanism was due to the presence of Lewis acid sites on the metal (Al) [112].…”

H2/D2 separation in gas chromatography through a MOF-on-MOF strategy using γ-AlOOH@Al(OH)(1,4-NDC)@ZIF-67 as the stationary phase via additive effects of chemical affinity quantum sieving and kinetic sieving

“…The synthesis of γ-AlOOH was obtained according to the method described in the literature. 36 The infrared spectral data (KBr, cm −1 ) were 3299 (s), 3093 (s), 2364 (w), 3100 (w), 1637 (w), 1386 (w), 1159 (w), and 1072 (s).…”

“…γ-AlOOH@Al(OH)(1,4-NDC) was synthesized according to the method described in the literature. 36 In order to obtain composite materials with different Al(OH)(1,4-NDC) contents, the addition amount of 1,4-H 2 NDC was changed to 0.01, 0.03, 0.05, 0.10, and 0.15 g, respectively. The results of elemental analysis showed that the contents of Al(OH)(1,4-NDC) in the γ-AlOOH@Al(OH)(1,4-NDC) composites were 1.02%, 1.12%, 2.61%, 4.35% and 6.63%, respectively.…”

“…According to the analysis above, this work reported a MOFon-MOF strategy, namely, growing ZIF-67 (with the CAQS effect and the kinetic sieving effect) on Al(OH)(1,4-NDC) (with the kinetic sieving effect) to obtain a composite with an additive effect for the separation of the H 2 /D 2 . γ-AlOOH@Al(OH)(1,4-NDC) composite was obtained by reacting porous γ-Al 2 O 3 particles (gas chromatography special carrier, size 80-100 mesh) acting as both a sacrificial template and an aluminum source with 1,4-naphthalene diacid (H 2 NDC) through the in situ sacrificial template method, 35,36 on which ZIF-67 was then loaded by the in situ crystallization method, [37][38][39] leading to the formation of a new composite. The separation conditions were investigated systematically by using the composites as the stationary phase in gas chromatography.…”

“…Fig.S3 † (lines c-f) shows the infrared spectra of γ-AlOOH @1.12%-Al(OH)(1,4-NDC)@n-ZIF-67 (n = 1, 2, 3, 4) composites. The bands of ZIF-67 appeared at 1458, 1423, 1386, 1309 and 850-650 cm −1 (ref.49 and 50) while the bands of γ-AlOOH@1.12%-Al(OH) (1,4-NDC) appeared at 1401, 1367, 740, 618 and 491 cm −1 ,36,51 which indicated that ZIF-67 was successfully loaded on γ-AlOOH@Al(OH)(1,4-NDC). Fig.S4b-f† show the infrared spectra of the γ-AlOOH@n′-ZIF-67 composite (n′ = 2, 4, 6, 8), and the characteristic vibration bands attributable to ZIF-67 appearing at 1386 and 1309 cm −1 and the characteristic vibrational bands attributed to γ-AlOOH appearing at 740, 618 and 491 cm −1 indicate that ZIF-67 is successfully loaded on γ-AlOOH.As shown in Fig.S5† (line a and line b), the characteristic diffraction peaks of γ-Al 2 O 3 and γ-AlOOH appear at 2θ = 14.5, 28.1, 38.2, 48.9 and 64.6°(ref.43 and 44) and 14.5°, 28.1°, 38.2°, 48.9°, 51.6°, 55.0°, 64.6°,52 respectively.…”