A vapour deposition (VD) method was established for preparation of the UiO-66-supported Fe (Fe/UiO-66) catalyst, which provided the first case of the metal-organic framework (MOF)-supported Fe catalyst prepared by using the vapour-based method. The Fe loading was around 7.0–8.5 wt% under the present preparation conditions. The crystal structure of UiO-66 was not obviously influenced by the Fe loading, while the surface area significantly decreased, implicating most of the Fe components resided in the pores on UiO-66. The results for the methyl orange (MO) removal tests showed that MO in aqueous solution can be removed by UiO-66 by adsorption, and in contrast, it can be oxidized by H
2
O
2
with the catalysis of Fe/UiO-66. Further catalytic tests showed that Fe/UiO-66 was rather effective to catalyse the oxidation of benzene derivatives like aniline in water in terms of chemical oxygen demand (COD) removal efficiency. The catalytic test results for Fe/UiO-66 were compared to those of Fe/Al
2
O
3
with the same Fe loading and to the catalysts reported in the literature. This paper provides a general strategy for VD preparation of MOF-supported Fe catalyst on the one hand, and new catalysts for removing organic pollutants from water, on the other hand.
Metal organic framework
(MOF)-supported Fe catalysts belong to
an important class of catalysts used for the advanced oxidation of
organic pollutants in water. The successful preparation of the Fe/MIL-100(Cr)
and Fe/MIL-101(Cr) catalysts in this work reinforced that a recently
established carrier-gas free vapor deposition method can be a general
one for preparing Fe/MOF catalysts. The Fe loading was in the range
of 7.8–27.2 wt % on Fe/MIL-101(Cr) at a deposition temperature
of 110–150 °C, and it was only 4.35 wt % on Fe/MIL-100(Cr)
at 110 °C in comparison. The results obtained from the characterization
using the N2-isotherm and EDX mapping showed that the Fe
components resided uniformly within the pore of the MOF supports.
Both of Fe/MIL-100(Cr) and Fe/MIL-101(Cr) were rather effective for
the catalytic removal of aniline from water with Fenton oxidation.
Fe/MIL-100(Cr) can effectively remove the total organic carbon (TOC)
of the aniline solutions, while Fe/MIL-101(Cr) had a lower TOC removal
efficiency. Both of the Fe/MIL-100(Cr) and Fe/MIL-101(Cr) catalysts
showed good stability in the crystalline form compared to the previously
prepared Fe/UiO-66 catalyst, implicating that they can be potentially
more useful than Fe/UiO-66 for treating organic pollutants in water.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.