MIL-101-NH₂(Fe)-Coated Nylon Microfibers for Immobilized Photocatalysts in RhB and Cr(VI) Removal

Abstract

MIL-101-NH 2 (Fe) is one of the effective photocatalytic metal− organic frameworks (MOFs) working under visible light. However, its powder-type form inhibits reusability in practical applications. In this study, we immobilized MIL-101-NH 2 (Fe) on a polymeric microfiber mesh to improve reusability while minimizing the loss of catalytic performance. To overcome the lack of surface functionality of the nylon fibers, an atomic layer deposition Al 2 O 3 layer and NH 2 -BDC linker were introduced to facilitate uniform coating of the MOF on the fiber surface. The reactions of the metal precursor to the nylon substrate and NH 2 -BDC ligand of the MOF allow chemical bonding from the core to the shell of the entire hybrid catalytic materials. The resulting fiber-immobilized MOFs (Nylon@Al 2 O 3 @ MOF) demonstrated high photocatalytic performance in the removal of RhB and Cr(VI) as representatives of organic dyes and heavy metals, respectively, while retaining over 85% of its efficiency after five cycles.

MXene–MOF architectural hybrid-supported nickel single-atom catalysts for hydrogen evolution reactions

“…S2e † conrms the effective formation of hexagonal Fe-MOF rods, showing crystalline peaks around 8-10°. 50 MFN shows a more similar pattern with MXenes, with a less intense peak of iron oxide, where no other metal clusters or nanoparticle peaks of Ni were observed hinting the distribution of Ni as single atoms (Fig. 3f).…”

Recent Advances in Metal-Organic Framework (MOF)-Based Photocatalysts: Design Strategies and Applications in Heavy Metal Control

“…Exploring computational modeling to guide rational design [ 129 , 134 , 135 ]. Immobilizing MOFs on supports such as fibers and membranes for reuse [ 136 , 137 ]. Developing MOF-based composites and devices for practical applications [ 138 , 139 ].…”

Applications of BiOX in the Photocatalytic Reactions

“…Up to now, many photocatalysts have been discovered and exhibited excellent photocatalytic activities, such as TiO 2 [23], ZnO [24], ZrO 2 [25], In 2 O 3 [26], BiOX [27][28][29], C 3 N 4 [30], MOF [31], etc. Among them, BiOX (X = Cl, Br, I) families are a newly discovered type of photocatalysts, which is the crystal structure of PbFCl type (space groups P4/nmm, D 4h symmetry tetragonal system) [32,33].…”