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摘要:
The constructed strategy of the disorderly layered UiO-66-on-clinoptilolite heterostructures was proposed through assistance of polyethylene glycol (PEG) and polyvinylpyrrolidone (PVP). Their physicochemical properties were demonstrated via various characterizations, such as X-ray powder diffraction (XRD) patterns and scanning/transmission electron microscope (SEM/TEM) images. Particularly, the small-angle X-ray scattering (SAXS) method was employed to elucidate their fractal structure evolutions, manifesting the transformations of surface fractal with irregularity and roughness. The results showed that the PEG introduction was beneficial to the formation of disorderly layered clinoptilolites (CP). The particles sizes of UiO-66-NH2 were successfully controlled via additive PVP, and the interactions between UiO-66-NH2 and deposited CP-PEG were enhanced. The preliminarily adsorption performances of the obtained UiO-66-on-CPs exhibited a superior selective factor (around 26) of CO2/CH4. This approach may open a new avenue to improve its adsorption selective performance for CO2 and CH4 due to its dual microporous features and enlarged lamellar spacing.
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来源 :
MATERIALS LETTERS
ISSN: 0167-577X
年份: 2022
卷: 328
3 . 0
JCR@2022
3 . 0 0 0
JCR@2022
ESI学科: MATERIALS SCIENCE;
ESI高被引阀值:66
JCR分区:2
中科院分区:3
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