Vapor Deposition-Prepared MIL-100(Cr)- and MIL-101(Cr)-Supported Iron Catalysts for Effectively Removing Organic Pollutants from Water

Huimin Zhuang; Wumin Zhang; Lu Wang; Yuanyuan Zhu; Yanyan Xi; Xufeng Lin

doi:10.1021/acsomega.1c03118

Vapor Deposition-Prepared MIL-100(Cr)- and MIL-101(Cr)-Supported Iron Catalysts for Effectively Removing Organic Pollutants from Water

ACS Omega. 2021 Sep 24;6(39):25311-25322. doi: 10.1021/acsomega.1c03118. eCollection 2021 Oct 5.

Authors

Huimin Zhuang¹, Wumin Zhang¹, Lu Wang², Yuanyuan Zhu², Yanyan Xi^{2

3}, Xufeng Lin^{1

3}

Affiliations

¹ Department of Chemistry, College of Science, China University of Petroleum (East China), Qingdao 266580, P. R. China.
² College of Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, P. R. China.
³ State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao 266580, P. R. China.

Abstract

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.