Fabrication of Functionalized UiO-66 Anchored on Disorderly Layered Clinoptilolite via Surfactant-Assisted Induction for Selective Adsorption of CO2 and CH4

Bingying Jia; Liujie Bing; Bang Xu; Jihong Sun; Shiyang Bai

doi:10.1021/acs.langmuir.2c02070

Fabrication of Functionalized UiO-66 Anchored on Disorderly Layered Clinoptilolite via Surfactant-Assisted Induction for Selective Adsorption of CO₂ and CH₄

Langmuir. 2022 Dec 6;38(48):14644-14655. doi: 10.1021/acs.langmuir.2c02070. Epub 2022 Nov 25.

Authors

Bingying Jia¹, Liujie Bing¹, Bang Xu¹, Jihong Sun¹, Shiyang Bai¹

Affiliation

¹ Beijing Key Laboratory for Green Catalysis and Separation, Department of Environmental and Chemical Engineering, Beijing University of Technology, Beijing100124, China.

PMID: 36427194
DOI: 10.1021/acs.langmuir.2c02070

Abstract

The amine (NH₂)-functionalized UiO-66 was successfully anchored on disorderly layered clinoptilolite (CP) via surfactant (poly(ethylene glycol) (PEG) and poly(vinylpyrrolidone) (PVP))-assisted induction. The structural features and physicochemical parameters of the resultant UiO-66-on-CPs were characterized by powder X-ray diffraction (XRD) patterns, scanning/transmission electron microscopy (SEM/TEM) images, Fourier transform infrared (FT-IR) spectra, N₂ sorption isotherms, and small-angle X-ray scattering (SAXS) patterns. The results demonstrated that the growth of UiO-66-NH₂ nanoparticles facilitated the disorder degree of the crystal plane of CP along the a-axis, while the addition of PEG in the hydrothermal synthesis system of CP was conducive to the formation of a flower-like microstructure and the introduction of PVP was beneficial to the nucleation and growth of UiO-66-NH₂ nanoparticles with a small size (40 nm) on the surfaces of the obtained CP-PEG lamellas. Finally, the gas-selective adsorption and separation performances of CO₂ and CH₄ were evaluated using the synthesized disorderly layered UiO-66-on-CP heterostructures as adsorbents, indicating that the NH₂-functionalized UiO-66-on-CP exhibited a superior selective factor (3.66) of CO₂/CH₄. These results elucidated that the proposed approach is a promising strategy for constructing MOF-on-zeolite heterostructures, which may open an avenue to expand CP application and improve their performance.