Adsorption of 2,4-dichlorophenoxyacetic acid in an aqueous medium on nanoscale MIL-53(Al) type materialsстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 20 декабря 2019 г.
Аннотация:A series of flexible metal–organic frameworks (MOFs) belonging to the MIL-53 family, such as MIL-53(Al),
its amino-functionalized analog NH2-MIL-53(Al), and MIL-53(Al) type materials with Al3+ ions and mixed
benzene-1,4-dicarboxylate and 2-aminobenzene-1,4-dicarboxylate linkers (MixLR) in various proportions
were prepared in a nanocrystalline form using MW-activation under atmospheric pressure according to
the original solvothermal procedure. The MIL-53(Al) and NH2-MIL-53(Al) samples feature nanocrystals
with sizes of 200–300 nm, while MixLR matrices synthesized in this manner are composed of small
nanoparticles with sizes of about 20–30 nm. MIL-53(Al) type materials (MIL-53(Al), NH2-MIL-53(Al) and
MixLR) were probed in the adsorption of a typical herbicide 2,4-dichlorophenoxyacetic acid (2,4-D) in an
aqueous medium. This study revealed a strong impact of the flexibility and porosity of the synthesized
MIL-53(Al) type matrices on their physicochemical characteristics. MIL-53(Al) type materials show much
higher 2,4-D adsorption rates than an activated carbon matrix (CSAC). The structural characteristics of the
studied MIL-53(Al) type materials were established with a high resolution X-ray powder diffractometer
equipped with a synchrotron radiation source. The obtained results can be used for the development of
advanced adsorbents based on MIL-53(Al) type materials for water remediation.