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

Munchan Kang; Sung Ho Yu; Kyung-Youl Baek; Myung Mo Sung; Sangho Cho

doi:10.1021/acsomega.3c00432

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

ACS Omega. 2023 Apr 21;8(17):15298-15305. doi: 10.1021/acsomega.3c00432. eCollection 2023 May 2.

Authors

Munchan Kang^{1

2}, Sung Ho Yu^{1

2}, Kyung-Youl Baek^{1

3

4}, Myung Mo Sung², Sangho Cho^{1

3}

Affiliations

¹ Materials Architecturing Research Center, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea.
² Department of Chemistry, Hanyang University, Seoul 04763, Republic of Korea.
³ Division of Nano and Information Technology, KIST School, Korea University of Science and Technology, Seoul 02792, Republic of Korea.
⁴ KHU-KIST Department of Converging Science and Technology, Kyung Hee University, Seoul 02447, Republic of Korea.

Abstract

MIL-101-NH₂(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-NH₂(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 Al₂O₃ layer and NH₂-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 NH₂-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@Al₂O₃@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.